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<h1>Class PoolEmitter</h1></div>
<section class="tsd-panel tsd-comment">
<div class="tsd-comment tsd-typography"><p>Pool events emitter.</p>
</div>
<div class="tsd-comment tsd-typography"></div></section>
<section class="tsd-panel tsd-hierarchy">
<h4>Hierarchy</h4>
<ul class="tsd-hierarchy">
<li><span class="tsd-signature-type ">EventEmitter</span>
<ul class="tsd-hierarchy">
<li><span class="target">PoolEmitter</span></li></ul></li></ul></section><aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/poolifier/poolifier/blob/3e9ac5c/src/pools/pool.ts#L40">src/pools/pool.ts:40</a></li></ul></aside>
<section class="tsd-panel-group tsd-index-group">
<section class="tsd-panel tsd-index-panel">
<details class="tsd-index-content tsd-index-accordion" open><summary class="tsd-accordion-summary tsd-index-summary">
<h5 class="tsd-index-heading uppercase" role="button" aria-expanded="false" tabIndex=0><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><use href="#icon-chevronSmall"></use></svg> Index</h5></summary>
<div class="tsd-accordion-details">
<section class="tsd-index-section">
<h3 class="tsd-index-heading">Constructors</h3>
<div class="tsd-index-list"><a href="PoolEmitter.html#constructor" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-512"></use></svg><span>constructor</span></a>
</div></section>
<section class="tsd-index-section">
<h3 class="tsd-index-heading">Properties</h3>
<div class="tsd-index-list"><a href="PoolEmitter.html#captureRejectionSymbol" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-1024"></use></svg><span>capture<wbr/>Rejection<wbr/>Symbol</span></a>
<a href="PoolEmitter.html#captureRejections" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-1024"></use></svg><span>capture<wbr/>Rejections</span></a>
<a href="PoolEmitter.html#defaultMaxListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-1024"></use></svg><span>default<wbr/>Max<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#errorMonitor" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-1024"></use></svg><span>error<wbr/>Monitor</span></a>
</div></section>
<section class="tsd-index-section">
<h3 class="tsd-index-heading">Methods</h3>
<div class="tsd-index-list"><a href="PoolEmitter.html#addListener" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>add<wbr/>Listener</span></a>
<a href="PoolEmitter.html#emit" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>emit</span></a>
<a href="PoolEmitter.html#eventNames" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>event<wbr/>Names</span></a>
<a href="PoolEmitter.html#getMaxListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>get<wbr/>Max<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#listenerCount" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>listener<wbr/>Count</span></a>
<a href="PoolEmitter.html#listeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>listeners</span></a>
<a href="PoolEmitter.html#off" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>off</span></a>
<a href="PoolEmitter.html#on" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>on</span></a>
<a href="PoolEmitter.html#once" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>once</span></a>
<a href="PoolEmitter.html#prependListener" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>prepend<wbr/>Listener</span></a>
<a href="PoolEmitter.html#prependOnceListener" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>prepend<wbr/>Once<wbr/>Listener</span></a>
<a href="PoolEmitter.html#rawListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>raw<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#removeAllListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>remove<wbr/>All<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#removeListener" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>remove<wbr/>Listener</span></a>
<a href="PoolEmitter.html#setMaxListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>set<wbr/>Max<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#addAbortListener" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>add<wbr/>Abort<wbr/>Listener</span></a>
<a href="PoolEmitter.html#getEventListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>get<wbr/>Event<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#getMaxListeners-2" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>get<wbr/>Max<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#listenerCount-2" class="tsd-index-link deprecated tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>listener<wbr/>Count</span></a>
<a href="PoolEmitter.html#on-2" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>on</span></a>
<a href="PoolEmitter.html#once-2" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>once</span></a>
<a href="PoolEmitter.html#setMaxListeners-2" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" viewBox="0 0 24 24"><use href="#icon-2048"></use></svg><span>set<wbr/>Max<wbr/>Listeners</span></a>
</div></section></div></details></section></section>
<section class="tsd-panel-group tsd-member-group">
<h2>Constructors</h2>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="constructor" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>constructor</span><a href="#constructor" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="constructor.new_PoolEmitter"><span class="tsd-kind-constructor-signature">new <wbr/>Pool<wbr/>Emitter</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">options</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#constructor.new_PoolEmitter" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">options</span>: <span class="tsd-signature-type ">EventEmitterOptions</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.constructor</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:109</li></ul></aside></li></ul></section></section>
<section class="tsd-panel-group tsd-member-group">
<h2>Properties</h2>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="captureRejectionSymbol" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <code class="tsd-tag ts-flagReadonly">Readonly</code> <span>capture<wbr/>Rejection<wbr/>Symbol</span><a href="#captureRejectionSymbol" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<div class="tsd-signature"><span class="tsd-kind-property">capture<wbr/>Rejection<wbr/>Symbol</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-symbol">typeof </span><a href="PoolEmitter.html#captureRejectionSymbol" class="tsd-signature-type tsd-kind-property">captureRejectionSymbol</a></div>
<div class="tsd-comment tsd-typography"><p>Value: <code>Symbol.for(&#39;nodejs.rejection&#39;)</code></p>
<p>See how to write a custom <code>rejection handler</code>.</p>
</div>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v13.4.0, v12.16.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.captureRejectionSymbol</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:390</li></ul></aside></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="captureRejections" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>capture<wbr/>Rejections</span><a href="#captureRejections" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<div class="tsd-signature"><span class="tsd-kind-property">capture<wbr/>Rejections</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">boolean</span></div>
<div class="tsd-comment tsd-typography"><p>Value: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type">boolean</a></p>
<p>Change the default <code>captureRejections</code> option on all new <code>EventEmitter</code> objects.</p>
</div>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v13.4.0, v12.16.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.captureRejections</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:397</li></ul></aside></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="defaultMaxListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>default<wbr/>Max<wbr/>Listeners</span><a href="#defaultMaxListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<div class="tsd-signature"><span class="tsd-kind-property">default<wbr/>Max<wbr/>Listeners</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div>
<div class="tsd-comment tsd-typography"><p>By default, a maximum of <code>10</code> listeners can be registered for any single
event. This limit can be changed for individual <code>EventEmitter</code> instances
using the <code>emitter.setMaxListeners(n)</code> method. To change the default
for <em>all</em><code>EventEmitter</code> instances, the <code>events.defaultMaxListeners</code>property can be used. If this value is not a positive number, a <code>RangeError</code>is thrown.</p>
<p>Take caution when setting the <code>events.defaultMaxListeners</code> because the
change affects <em>all</em><code>EventEmitter</code> instances, including those created before
the change is made. However, calling <code>emitter.setMaxListeners(n)</code> still has
precedence over <code>events.defaultMaxListeners</code>.</p>
<p>This is not a hard limit. The <code>EventEmitter</code> instance will allow
more listeners to be added but will output a trace warning to stderr indicating
that a &quot;possible EventEmitter memory leak&quot; has been detected. For any single<code>EventEmitter</code>, the <code>emitter.getMaxListeners()</code> and <code>emitter.setMaxListeners()</code>methods can be used to
temporarily avoid this warning:</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">emitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">setMaxListeners</span><span class="hl-0">(</span><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">getMaxListeners</span><span class="hl-0">() + </span><span class="hl-1">1</span><span class="hl-0">);</span><br/><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-8">// do stuff</span><br/><span class="hl-0">  </span><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">setMaxListeners</span><span class="hl-0">(</span><span class="hl-3">Math</span><span class="hl-0">.</span><span class="hl-2">max</span><span class="hl-0">(</span><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">getMaxListeners</span><span class="hl-0">() - </span><span class="hl-1">1</span><span class="hl-0">, </span><span class="hl-1">0</span><span class="hl-0">));</span><br/><span class="hl-0">});</span>
</code><button>Copy</button></pre>
<p>The <code>--trace-warnings</code> command-line flag can be used to display the
stack trace for such warnings.</p>
<p>The emitted warning can be inspected with <code>process.on(&#39;warning&#39;)</code> and will
have the additional <code>emitter</code>, <code>type</code>, and <code>count</code> properties, referring to
the event emitter instance, the event&#39;s name and the number of attached
listeners, respectively.
Its <code>name</code> property is set to <code>&#39;MaxListenersExceededWarning&#39;</code>.</p>
</div>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.11.2</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.defaultMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:434</li></ul></aside></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="errorMonitor" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <code class="tsd-tag ts-flagReadonly">Readonly</code> <span>error<wbr/>Monitor</span><a href="#errorMonitor" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<div class="tsd-signature"><span class="tsd-kind-property">error<wbr/>Monitor</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-symbol">typeof </span><a href="PoolEmitter.html#errorMonitor" class="tsd-signature-type tsd-kind-property">errorMonitor</a></div>
<div class="tsd-comment tsd-typography"><p>This symbol shall be used to install a listener for only monitoring <code>&#39;error&#39;</code>events. Listeners installed using this symbol are called before the regular<code>&#39;error&#39;</code> listeners are called.</p>
<p>Installing a listener using this symbol does not change the behavior once an<code>&#39;error&#39;</code> event is emitted. Therefore, the process will still crash if no
regular <code>&#39;error&#39;</code> listener is installed.</p>
</div>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v13.6.0, v12.17.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.errorMonitor</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:383</li></ul></aside></section></section>
<section class="tsd-panel-group tsd-member-group">
<h2>Methods</h2>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="addListener" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>add<wbr/>Listener</span><a href="#addListener" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="addListener.addListener-1"><span class="tsd-kind-call-signature">add<wbr/>Listener</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#addListener.addListener-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Alias for <code>emitter.on(eventName, listener)</code>.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.26</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.addListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:454</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="emit" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>emit</span><a href="#emit" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="emit.emit-1"><span class="tsd-kind-call-signature">emit</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span><a href="#emit.emit-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Synchronously calls each of the listeners registered for the event named<code>eventName</code>, in the order they were registered, passing the supplied arguments
to each.</p>
<p>Returns <code>true</code> if the event had listeners, <code>false</code> otherwise.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEmitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-8">// First listener</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">firstListener</span><span class="hl-0">() {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;Helloooo! first listener&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><span class="hl-8">// Second listener</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">secondListener</span><span class="hl-0">(</span><span class="hl-3">arg1</span><span class="hl-0">, </span><span class="hl-3">arg2</span><span class="hl-0">) {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">`event with parameters </span><span class="hl-4">${</span><span class="hl-3">arg1</span><span class="hl-4">}</span><span class="hl-6">, </span><span class="hl-4">${</span><span class="hl-3">arg2</span><span class="hl-4">}</span><span class="hl-6"> in second listener`</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><span class="hl-8">// Third listener</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">thirdListener</span><span class="hl-0">(...</span><span class="hl-3">args</span><span class="hl-0">) {</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">parameters</span><span class="hl-0"> = </span><span class="hl-3">args</span><span class="hl-0">.</span><span class="hl-2">join</span><span class="hl-0">(</span><span class="hl-6">&#39;, &#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">`event with parameters </span><span class="hl-4">${</span><span class="hl-3">parameters</span><span class="hl-4">}</span><span class="hl-6"> in third listener`</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><br/><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">listeners</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">));</span><br/><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-1">1</span><span class="hl-0">, </span><span class="hl-1">2</span><span class="hl-0">, </span><span class="hl-1">3</span><span class="hl-0">, </span><span class="hl-1">4</span><span class="hl-0">, </span><span class="hl-1">5</span><span class="hl-0">);</span><br/><br/><span class="hl-8">// Prints:</span><br/><span class="hl-8">// [</span><br/><span class="hl-8">//   [Function: firstListener],</span><br/><span class="hl-8">//   [Function: secondListener],</span><br/><span class="hl-8">//   [Function: thirdListener]</span><br/><span class="hl-8">// ]</span><br/><span class="hl-8">// Helloooo! first listener</span><br/><span class="hl-8">// event with parameters 1, 2 in second listener</span><br/><span class="hl-8">// event with parameters 1, 2, 3, 4, 5 in third listener</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li>
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.26</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.emit</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:716</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="eventNames" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>event<wbr/>Names</span><a href="#eventNames" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="eventNames.eventNames-1"><span class="tsd-kind-call-signature">event<wbr/>Names</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">[]</span><a href="#eventNames.eventNames-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns an array listing the events for which the emitter has registered
listeners. The values in the array are strings or <code>Symbol</code>s.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEE</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {});</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;bar&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {});</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">sym</span><span class="hl-0"> = </span><span class="hl-2">Symbol</span><span class="hl-0">(</span><span class="hl-6">&#39;symbol&#39;</span><span class="hl-0">);</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-3">sym</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {});</span><br/><br/><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">eventNames</span><span class="hl-0">());</span><br/><span class="hl-8">// Prints: [ &#39;foo&#39;, &#39;bar&#39;, Symbol(symbol) ]</span>
</code><button>Copy</button></pre>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-symbol">(</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">[]</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v6.0.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.eventNames</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:779</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="getMaxListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>get<wbr/>Max<wbr/>Listeners</span><a href="#getMaxListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="getMaxListeners.getMaxListeners-1"><span class="tsd-kind-call-signature">get<wbr/>Max<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span><a href="#getMaxListeners.getMaxListeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns the current max listener value for the <code>EventEmitter</code> which is either
set by <code>emitter.setMaxListeners(n)</code> or defaults to <a href="PoolEmitter.html#defaultMaxListeners" class="tsd-kind-property">defaultMaxListeners</a>.</p>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v1.0.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.getMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:631</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="listenerCount" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>listener<wbr/>Count</span><a href="#listenerCount" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="listenerCount.listenerCount-1"><span class="tsd-kind-call-signature">listener<wbr/>Count</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span><a href="#listenerCount.listenerCount-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns the number of listeners listening for the event named <code>eventName</code>.
If <code>listener</code> is provided, it will return how many times the listener is found
in the list of the listeners of the event.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event being listened for</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-type ">Function</span></h5>
<div class="tsd-comment tsd-typography"><p>The event handler function</p>
</div>
<div class="tsd-comment tsd-typography"></div></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v3.2.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.listenerCount</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:725</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="listeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>listeners</span><a href="#listeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="listeners.listeners-1"><span class="tsd-kind-call-signature">listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span><a href="#listeners.listeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns a copy of the array of listeners for the event named <code>eventName</code>.</p>
<pre><code class="language-js"><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;someone connected!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">util</span><span class="hl-0">.</span><span class="hl-2">inspect</span><span class="hl-0">(</span><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">listeners</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">)));</span><br/><span class="hl-8">// Prints: [ [Function] ]</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.26</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.listeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:644</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="off" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>off</span><a href="#off" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="off.off-1"><span class="tsd-kind-call-signature">off</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#off.off-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Alias for <code>emitter.removeListener()</code>.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v10.0.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.off</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:604</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="on" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>on</span><a href="#on" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="on.on-1"><span class="tsd-kind-call-signature">on</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#on.on-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Adds the <code>listener</code> function to the end of the listeners array for the
event named <code>eventName</code>. No checks are made to see if the <code>listener</code> has
already been added. Multiple calls passing the same combination of <code>eventName</code>and <code>listener</code> will result in the <code>listener</code> being added, and called, multiple
times.</p>
<pre><code class="language-js"><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;someone connected!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span>
</code><button>Copy</button></pre>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
<p>By default, event listeners are invoked in the order they are added. The<code>emitter.prependListener()</code> method can be used as an alternative to add the
event listener to the beginning of the listeners array.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEE</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;a&#39;</span><span class="hl-0">));</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">prependListener</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;b&#39;</span><span class="hl-0">));</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">);</span><br/><span class="hl-8">// Prints:</span><br/><span class="hl-8">//   b</span><br/><span class="hl-8">//   a</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event.</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<div class="tsd-comment tsd-typography"><p>The callback function</p>
</div>
<div class="tsd-comment tsd-typography"></div>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.101</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.on</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:486</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="once" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>once</span><a href="#once" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="once.once-1"><span class="tsd-kind-call-signature">once</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#once.once-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Adds a <strong>one-time</strong><code>listener</code> function for the event named <code>eventName</code>. The
next time <code>eventName</code> is triggered, this listener is removed and then invoked.</p>
<pre><code class="language-js"><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;Ah, we have our first user!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span>
</code><button>Copy</button></pre>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
<p>By default, event listeners are invoked in the order they are added. The<code>emitter.prependOnceListener()</code> method can be used as an alternative to add the
event listener to the beginning of the listeners array.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEE</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;a&#39;</span><span class="hl-0">));</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">prependOnceListener</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;b&#39;</span><span class="hl-0">));</span><br/><span class="hl-3">myEE</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">);</span><br/><span class="hl-8">// Prints:</span><br/><span class="hl-8">//   b</span><br/><span class="hl-8">//   a</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event.</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<div class="tsd-comment tsd-typography"><p>The callback function</p>
</div>
<div class="tsd-comment tsd-typography"></div>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.3.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.once</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:516</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="prependListener" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>prepend<wbr/>Listener</span><a href="#prependListener" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="prependListener.prependListener-1"><span class="tsd-kind-call-signature">prepend<wbr/>Listener</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#prependListener.prependListener-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Adds the <code>listener</code> function to the <em>beginning</em> of the listeners array for the
event named <code>eventName</code>. No checks are made to see if the <code>listener</code> has
already been added. Multiple calls passing the same combination of <code>eventName</code>and <code>listener</code> will result in the <code>listener</code> being added, and called, multiple
times.</p>
<pre><code class="language-js"><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">prependListener</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;someone connected!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span>
</code><button>Copy</button></pre>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event.</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<div class="tsd-comment tsd-typography"><p>The callback function</p>
</div>
<div class="tsd-comment tsd-typography"></div>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v6.0.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.prependListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:743</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="prependOnceListener" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>prepend<wbr/>Once<wbr/>Listener</span><a href="#prependOnceListener" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="prependOnceListener.prependOnceListener-1"><span class="tsd-kind-call-signature">prepend<wbr/>Once<wbr/>Listener</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#prependOnceListener.prependOnceListener-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Adds a <strong>one-time</strong><code>listener</code> function for the event named <code>eventName</code> to the <em>beginning</em> of the listeners array. The next time <code>eventName</code> is triggered, this
listener is removed, and then invoked.</p>
<pre><code class="language-js"><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">prependOnceListener</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;Ah, we have our first user!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">});</span>
</code><button>Copy</button></pre>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event.</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<div class="tsd-comment tsd-typography"><p>The callback function</p>
</div>
<div class="tsd-comment tsd-typography"></div>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v6.0.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.prependOnceListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:759</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="rawListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>raw<wbr/>Listeners</span><a href="#rawListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="rawListeners.rawListeners-1"><span class="tsd-kind-call-signature">raw<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span><a href="#rawListeners.rawListeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns a copy of the array of listeners for the event named <code>eventName</code>,
including any wrappers (such as those created by <code>.once()</code>).</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">emitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-6">&#39;log&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;log once&#39;</span><span class="hl-0">));</span><br/><br/><span class="hl-8">// Returns a new Array with a function `onceWrapper` which has a property</span><br/><span class="hl-8">// `listener` which contains the original listener bound above</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">listeners</span><span class="hl-0"> = </span><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">rawListeners</span><span class="hl-0">(</span><span class="hl-6">&#39;log&#39;</span><span class="hl-0">);</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">logFnWrapper</span><span class="hl-0"> = </span><span class="hl-3">listeners</span><span class="hl-0">[</span><span class="hl-1">0</span><span class="hl-0">];</span><br/><br/><span class="hl-8">// Logs &quot;log once&quot; to the console and does not unbind the `once` event</span><br/><span class="hl-3">logFnWrapper</span><span class="hl-0">.</span><span class="hl-2">listener</span><span class="hl-0">();</span><br/><br/><span class="hl-8">// Logs &quot;log once&quot; to the console and removes the listener</span><br/><span class="hl-2">logFnWrapper</span><span class="hl-0">();</span><br/><br/><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;log&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;log persistently&#39;</span><span class="hl-0">));</span><br/><span class="hl-8">// Will return a new Array with a single function bound by `.on()` above</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">newListeners</span><span class="hl-0"> = </span><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">rawListeners</span><span class="hl-0">(</span><span class="hl-6">&#39;log&#39;</span><span class="hl-0">);</span><br/><br/><span class="hl-8">// Logs &quot;log persistently&quot; twice</span><br/><span class="hl-3">newListeners</span><span class="hl-0">[</span><span class="hl-1">0</span><span class="hl-0">]();</span><br/><span class="hl-3">emitter</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;log&#39;</span><span class="hl-0">);</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v9.4.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.rawListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:675</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="removeAllListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>remove<wbr/>All<wbr/>Listeners</span><a href="#removeAllListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="removeAllListeners.removeAllListeners-1"><span class="tsd-kind-call-signature">remove<wbr/>All<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">event</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#removeAllListeners.removeAllListeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Removes all listeners, or those of the specified <code>eventName</code>.</p>
<p>It is bad practice to remove listeners added elsewhere in the code,
particularly when the <code>EventEmitter</code> instance was created by some other
component or module (e.g. sockets or file streams).</p>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">event</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.26</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.removeAllListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:615</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="removeListener" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>remove<wbr/>Listener</span><a href="#removeListener" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="removeListener.removeListener-1"><span class="tsd-kind-call-signature">remove<wbr/>Listener</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">listener</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#removeListener.removeListener-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Removes the specified <code>listener</code> from the listener array for the event named<code>eventName</code>.</p>
<pre><code class="language-js"><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-2">callback</span><span class="hl-0"> = (</span><span class="hl-3">stream</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;someone connected!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">};</span><br/><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, </span><span class="hl-3">callback</span><span class="hl-0">);</span><br/><span class="hl-8">// ...</span><br/><span class="hl-3">server</span><span class="hl-0">.</span><span class="hl-2">removeListener</span><span class="hl-0">(</span><span class="hl-6">&#39;connection&#39;</span><span class="hl-0">, </span><span class="hl-3">callback</span><span class="hl-0">);</span>
</code><button>Copy</button></pre>
<p><code>removeListener()</code> will remove, at most, one instance of a listener from the
listener array. If any single listener has been added multiple times to the
listener array for the specified <code>eventName</code>, then <code>removeListener()</code> must be
called multiple times to remove each instance.</p>
<p>Once an event is emitted, all listeners attached to it at the
time of emitting are called in order. This implies that any<code>removeListener()</code> or <code>removeAllListeners()</code> calls <em>after</em> emitting and <em>before</em> the last listener finishes execution
will not remove them from<code>emit()</code> in progress. Subsequent events behave as expected.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">class</span><span class="hl-0"> </span><span class="hl-9">MyEmitter</span><span class="hl-0"> </span><span class="hl-4">extends</span><span class="hl-0"> </span><span class="hl-9">EventEmitter</span><span class="hl-0"> {}</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEmitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">MyEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-2">callbackA</span><span class="hl-0"> = () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;A&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">removeListener</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-3">callbackB</span><span class="hl-0">);</span><br/><span class="hl-0">};</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-2">callbackB</span><span class="hl-0"> = () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;B&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">};</span><br/><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-3">callbackA</span><span class="hl-0">);</span><br/><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, </span><span class="hl-3">callbackB</span><span class="hl-0">);</span><br/><br/><span class="hl-8">// callbackA removes listener callbackB but it will still be called.</span><br/><span class="hl-8">// Internal listener array at time of emit [callbackA, callbackB]</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">);</span><br/><span class="hl-8">// Prints:</span><br/><span class="hl-8">//   A</span><br/><span class="hl-8">//   B</span><br/><br/><span class="hl-8">// callbackB is now removed.</span><br/><span class="hl-8">// Internal listener array [callbackA]</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">);</span><br/><span class="hl-8">// Prints:</span><br/><span class="hl-8">//   A</span>
</code><button>Copy</button></pre>
<p>Because listeners are managed using an internal array, calling this will
change the position indices of any listener registered <em>after</em> the listener
being removed. This will not impact the order in which listeners are called,
but it means that any copies of the listener array as returned by
the <code>emitter.listeners()</code> method will need to be recreated.</p>
<p>When a single function has been added as a handler multiple times for a single
event (as in the example below), <code>removeListener()</code> will remove the most
recently added instance. In the example the <code>once(&#39;ping&#39;)</code>listener is removed:</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">pong</span><span class="hl-0">() {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;pong&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">}</span><br/><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;ping&#39;</span><span class="hl-0">, </span><span class="hl-3">pong</span><span class="hl-0">);</span><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-6">&#39;ping&#39;</span><span class="hl-0">, </span><span class="hl-3">pong</span><span class="hl-0">);</span><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">removeListener</span><span class="hl-0">(</span><span class="hl-6">&#39;ping&#39;</span><span class="hl-0">, </span><span class="hl-3">pong</span><span class="hl-0">);</span><br/><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;ping&#39;</span><span class="hl-0">);</span><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;ping&#39;</span><span class="hl-0">);</span>
</code><button>Copy</button></pre>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">listener</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">args</span>: <span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.1.26</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.removeListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:599</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="setMaxListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><span>set<wbr/>Max<wbr/>Listeners</span><a href="#setMaxListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="setMaxListeners.setMaxListeners-1"><span class="tsd-kind-call-signature">set<wbr/>Max<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">n</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a><a href="#setMaxListeners.setMaxListeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>By default <code>EventEmitter</code>s will print a warning if more than <code>10</code> listeners are
added for a particular event. This is a useful default that helps finding
memory leaks. The <code>emitter.setMaxListeners()</code> method allows the limit to be
modified for this specific <code>EventEmitter</code> instance. The value can be set to<code>Infinity</code> (or <code>0</code>) to indicate an unlimited number of listeners.</p>
<p>Returns a reference to the <code>EventEmitter</code>, so that calls can be chained.</p>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">n</span>: <span class="tsd-signature-type">number</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <a href="PoolEmitter.html" class="tsd-signature-type tsd-kind-class">PoolEmitter</a></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.3.5</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.setMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:625</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="addAbortListener" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>add<wbr/>Abort<wbr/>Listener</span><a href="#addAbortListener" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="addAbortListener.addAbortListener-1"><span class="tsd-kind-call-signature">add<wbr/>Abort<wbr/>Listener</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">signal</span>, <span class="tsd-kind-parameter">resource</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Disposable</span><a href="#addAbortListener.addAbortListener-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description"><code class="tsd-tag ts-flagExperimental">Experimental</code> 
<div class="tsd-comment tsd-typography"><p>Listens once to the <code>abort</code> event on the provided <code>signal</code>.</p>
<p>Listening to the <code>abort</code> event on abort signals is unsafe and may
lead to resource leaks since another third party with the signal can
call <code>e.stopImmediatePropagation()</code>. Unfortunately Node.js cannot change
this since it would violate the web standard. Additionally, the original
API makes it easy to forget to remove listeners.</p>
<p>This API allows safely using <code>AbortSignal</code>s in Node.js APIs by solving these
two issues by listening to the event such that <code>stopImmediatePropagation</code> does
not prevent the listener from running.</p>
<p>Returns a disposable so that it may be unsubscribed from more easily.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">addAbortListener</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">example</span><span class="hl-0">(</span><span class="hl-3">signal</span><span class="hl-0">) {</span><br/><span class="hl-0">  </span><span class="hl-4">let</span><span class="hl-0"> </span><span class="hl-3">disposable</span><span class="hl-0">;</span><br/><span class="hl-0">  </span><span class="hl-5">try</span><span class="hl-0"> {</span><br/><span class="hl-0">    </span><span class="hl-3">signal</span><span class="hl-0">.</span><span class="hl-2">addEventListener</span><span class="hl-0">(</span><span class="hl-6">&#39;abort&#39;</span><span class="hl-0">, (</span><span class="hl-3">e</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">e</span><span class="hl-0">.</span><span class="hl-2">stopImmediatePropagation</span><span class="hl-0">());</span><br/><span class="hl-0">    </span><span class="hl-3">disposable</span><span class="hl-0"> = </span><span class="hl-2">addAbortListener</span><span class="hl-0">(</span><span class="hl-3">signal</span><span class="hl-0">, (</span><span class="hl-3">e</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">      </span><span class="hl-8">// Do something when signal is aborted.</span><br/><span class="hl-0">    });</span><br/><span class="hl-0">  } </span><span class="hl-5">finally</span><span class="hl-0"> {</span><br/><span class="hl-0">    </span><span class="hl-3">disposable</span><span class="hl-0">?.[</span><span class="hl-3">Symbol</span><span class="hl-0">.</span><span class="hl-3">dispose</span><span class="hl-0">]();</span><br/><span class="hl-0">  }</span><br/><span class="hl-0">}</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">signal</span>: <span class="tsd-signature-type ">AbortSignal</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">resource</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">event</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span></h5>
<ul class="tsd-parameters">
<li class="tsd-parameter-signature">
<ul class="tsd-signatures tsd-is-external">
<li class="tsd-signature"><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">event</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">event</span>: <span class="tsd-signature-type ">Event</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></li></ul></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Disposable</span></h4><p>that removes the <code>abort</code> listener.</p>

<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v20.5.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.addAbortListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:375</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="getEventListeners" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>get<wbr/>Event<wbr/>Listeners</span><a href="#getEventListeners" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="getEventListeners.getEventListeners-1"><span class="tsd-kind-call-signature">get<wbr/>Event<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span>, <span class="tsd-kind-parameter">name</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span><a href="#getEventListeners.getEventListeners-1" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns a copy of the array of listeners for the event named <code>eventName</code>.</p>
<p>For <code>EventEmitter</code>s this behaves exactly the same as calling <code>.listeners</code> on
the emitter.</p>
<p>For <code>EventTarget</code>s this is the only way to get the event listeners for the
event target. This is useful for debugging and diagnostic purposes.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">getEventListeners</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-0">{</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-2">listener</span><span class="hl-0"> = () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;Events are fun&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-3">listener</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getEventListeners</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">)); </span><span class="hl-8">// [ [Function: listener] ]</span><br/><span class="hl-0">}</span><br/><span class="hl-0">{</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">et</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventTarget</span><span class="hl-0">();</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-2">listener</span><span class="hl-0"> = () </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;Events are fun&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">et</span><span class="hl-0">.</span><span class="hl-2">addEventListener</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-3">listener</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getEventListeners</span><span class="hl-0">(</span><span class="hl-3">et</span><span class="hl-0">, </span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">)); </span><span class="hl-8">// [ [Function: listener] ]</span><br/><span class="hl-0">}</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">EventEmitter</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type ">_DOMEventTarget</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">name</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v15.2.0, v14.17.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.getEventListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:296</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="getMaxListeners-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>get<wbr/>Max<wbr/>Listeners</span><a href="#getMaxListeners-2" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="getMaxListeners-2.getMaxListeners-3"><span class="tsd-kind-call-signature">get<wbr/>Max<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span><a href="#getMaxListeners-2.getMaxListeners-3" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Returns the currently set max amount of listeners.</p>
<p>For <code>EventEmitter</code>s this behaves exactly the same as calling <code>.getMaxListeners</code> on
the emitter.</p>
<p>For <code>EventTarget</code>s this is the only way to get the max event listeners for the
event target. If the number of event handlers on a single EventTarget exceeds
the max set, the EventTarget will print a warning.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">getMaxListeners</span><span class="hl-0">, </span><span class="hl-3">setMaxListeners</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-0">{</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getMaxListeners</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">)); </span><span class="hl-8">// 10</span><br/><span class="hl-0">  </span><span class="hl-2">setMaxListeners</span><span class="hl-0">(</span><span class="hl-1">11</span><span class="hl-0">, </span><span class="hl-3">ee</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getMaxListeners</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">)); </span><span class="hl-8">// 11</span><br/><span class="hl-0">}</span><br/><span class="hl-0">{</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">et</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventTarget</span><span class="hl-0">();</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getMaxListeners</span><span class="hl-0">(</span><span class="hl-3">et</span><span class="hl-0">)); </span><span class="hl-8">// 10</span><br/><span class="hl-0">  </span><span class="hl-2">setMaxListeners</span><span class="hl-0">(</span><span class="hl-1">11</span><span class="hl-0">, </span><span class="hl-3">et</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">getMaxListeners</span><span class="hl-0">(</span><span class="hl-3">et</span><span class="hl-0">)); </span><span class="hl-8">// 11</span><br/><span class="hl-0">}</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">EventEmitter</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type ">_DOMEventTarget</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v19.9.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.getMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:325</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="listenerCount-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span class="deprecated">listener<wbr/>Count</span><a href="#listenerCount-2" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="listenerCount-2.listenerCount-3"><span class="tsd-kind-call-signature">listener<wbr/>Count</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span>, <span class="tsd-kind-parameter">eventName</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span><a href="#listenerCount-2.listenerCount-3" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>A class method that returns the number of listeners for the given <code>eventName</code>registered on the given <code>emitter</code>.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0">, </span><span class="hl-3">listenerCount</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">myEmitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {});</span><br/><span class="hl-3">myEmitter</span><span class="hl-0">.</span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">, () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {});</span><br/><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-2">listenerCount</span><span class="hl-0">(</span><span class="hl-3">myEmitter</span><span class="hl-0">, </span><span class="hl-6">&#39;event&#39;</span><span class="hl-0">));</span><br/><span class="hl-8">// Prints: 2</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">EventEmitter</span></h5>
<div class="tsd-comment tsd-typography"><p>The emitter to query</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5>
<div class="tsd-comment tsd-typography"><p>The event name</p>
</div>
<div class="tsd-comment tsd-typography"></div></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v0.9.12</p>

<h4>Deprecated</h4><p>Since v3.2.0 - Use <code>listenerCount</code> instead.</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.listenerCount</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:268</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="on-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>on</span><a href="#on-2" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="on-2.on-3"><span class="tsd-kind-call-signature">on</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span>, <span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">options</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">AsyncIterableIterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">&gt;</span><a href="#on-2.on-3" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">on</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-5">import</span><span class="hl-0"> </span><span class="hl-3">process</span><span class="hl-0"> </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:process&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-8">// Emit later on</span><br/><span class="hl-3">process</span><span class="hl-0">.</span><span class="hl-2">nextTick</span><span class="hl-0">(() </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-6">&#39;bar&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-1">42</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><br/><span class="hl-5">for</span><span class="hl-0"> </span><span class="hl-5">await</span><span class="hl-0"> (</span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">event</span><span class="hl-0"> </span><span class="hl-4">of</span><span class="hl-0"> </span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">)) {</span><br/><span class="hl-0">  </span><span class="hl-8">// The execution of this inner block is synchronous and it</span><br/><span class="hl-0">  </span><span class="hl-8">// processes one event at a time (even with await). Do not use</span><br/><span class="hl-0">  </span><span class="hl-8">// if concurrent execution is required.</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">event</span><span class="hl-0">); </span><span class="hl-8">// prints [&#39;bar&#39;] [42]</span><br/><span class="hl-0">}</span><br/><span class="hl-8">// Unreachable here</span>
</code><button>Copy</button></pre>
<p>Returns an <code>AsyncIterator</code> that iterates <code>eventName</code> events. It will throw
if the <code>EventEmitter</code> emits <code>&#39;error&#39;</code>. It removes all listeners when
exiting the loop. The <code>value</code> returned by each iteration is an array
composed of the emitted event arguments.</p>
<p>An <code>AbortSignal</code> can be used to cancel waiting on events:</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">on</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-5">import</span><span class="hl-0"> </span><span class="hl-3">process</span><span class="hl-0"> </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:process&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ac</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">AbortController</span><span class="hl-0">();</span><br/><br/><span class="hl-0">(</span><span class="hl-4">async</span><span class="hl-0"> () </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-0">  </span><span class="hl-8">// Emit later on</span><br/><span class="hl-0">  </span><span class="hl-3">process</span><span class="hl-0">.</span><span class="hl-2">nextTick</span><span class="hl-0">(() </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">    </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-6">&#39;bar&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">    </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-1">42</span><span class="hl-0">);</span><br/><span class="hl-0">  });</span><br/><br/><span class="hl-0">  </span><span class="hl-5">for</span><span class="hl-0"> </span><span class="hl-5">await</span><span class="hl-0"> (</span><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">event</span><span class="hl-0"> </span><span class="hl-4">of</span><span class="hl-0"> </span><span class="hl-2">on</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, { </span><span class="hl-3">signal:</span><span class="hl-0"> </span><span class="hl-3">ac</span><span class="hl-0">.</span><span class="hl-3">signal</span><span class="hl-0"> })) {</span><br/><span class="hl-0">    </span><span class="hl-8">// The execution of this inner block is synchronous and it</span><br/><span class="hl-0">    </span><span class="hl-8">// processes one event at a time (even with await). Do not use</span><br/><span class="hl-0">    </span><span class="hl-8">// if concurrent execution is required.</span><br/><span class="hl-0">    </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">event</span><span class="hl-0">); </span><span class="hl-8">// prints [&#39;bar&#39;] [42]</span><br/><span class="hl-0">  }</span><br/><span class="hl-0">  </span><span class="hl-8">// Unreachable here</span><br/><span class="hl-0">})();</span><br/><br/><span class="hl-3">process</span><span class="hl-0">.</span><span class="hl-2">nextTick</span><span class="hl-0">(() </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">ac</span><span class="hl-0">.</span><span class="hl-2">abort</span><span class="hl-0">());</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">EventEmitter</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span></h5>
<div class="tsd-comment tsd-typography"><p>The name of the event being listened for</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">options</span>: <span class="tsd-signature-type ">StaticEventEmitterOptions</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">AsyncIterableIterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">&gt;</span></h4><p>that iterates <code>eventName</code> events emitted by the <code>emitter</code></p>

<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v13.6.0, v12.16.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.on</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:250</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="once-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>once</span><a href="#once-2" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="once-2.once-3"><span class="tsd-kind-call-signature">once</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span>, <span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">options</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">&gt;</span><a href="#once-2.once-3" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Creates a <code>Promise</code> that is fulfilled when the <code>EventEmitter</code> emits the given
event or that is rejected if the <code>EventEmitter</code> emits <code>&#39;error&#39;</code> while waiting.
The <code>Promise</code> will resolve with an array of all the arguments emitted to the
given event.</p>
<p>This method is intentionally generic and works with the web platform <a href="https://dom.spec.whatwg.org/#interface-eventtarget">EventTarget</a> interface, which has no special<code>&#39;error&#39;</code> event
semantics and does not listen to the <code>&#39;error&#39;</code> event.</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">once</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><span class="hl-5">import</span><span class="hl-0"> </span><span class="hl-3">process</span><span class="hl-0"> </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:process&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-3">process</span><span class="hl-0">.</span><span class="hl-2">nextTick</span><span class="hl-0">(() </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;myevent&#39;</span><span class="hl-0">, </span><span class="hl-1">42</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> [</span><span class="hl-7">value</span><span class="hl-0">] = </span><span class="hl-5">await</span><span class="hl-0"> </span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;myevent&#39;</span><span class="hl-0">);</span><br/><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-3">value</span><span class="hl-0">);</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">err</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">Error</span><span class="hl-0">(</span><span class="hl-6">&#39;kaboom&#39;</span><span class="hl-0">);</span><br/><span class="hl-3">process</span><span class="hl-0">.</span><span class="hl-2">nextTick</span><span class="hl-0">(() </span><span class="hl-4">=&gt;</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;error&#39;</span><span class="hl-0">, </span><span class="hl-3">err</span><span class="hl-0">);</span><br/><span class="hl-0">});</span><br/><br/><span class="hl-5">try</span><span class="hl-0"> {</span><br/><span class="hl-0">  </span><span class="hl-5">await</span><span class="hl-0"> </span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;myevent&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">} </span><span class="hl-5">catch</span><span class="hl-0"> (</span><span class="hl-3">err</span><span class="hl-0">) {</span><br/><span class="hl-0">  </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">error</span><span class="hl-0">(</span><span class="hl-6">&#39;error happened&#39;</span><span class="hl-0">, </span><span class="hl-3">err</span><span class="hl-0">);</span><br/><span class="hl-0">}</span>
</code><button>Copy</button></pre>
<p>The special handling of the <code>&#39;error&#39;</code> event is only used when <code>events.once()</code>is used to wait for another event. If <code>events.once()</code> is used to wait for the
&#39;<code>error&#39;</code> event itself, then it is treated as any other kind of event without
special handling:</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0">, </span><span class="hl-3">once</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;error&#39;</span><span class="hl-0">)</span><br/><span class="hl-0">  .</span><span class="hl-2">then</span><span class="hl-0">(([</span><span class="hl-3">err</span><span class="hl-0">]) </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;ok&#39;</span><span class="hl-0">, </span><span class="hl-3">err</span><span class="hl-0">.</span><span class="hl-3">message</span><span class="hl-0">))</span><br/><span class="hl-0">  .</span><span class="hl-2">catch</span><span class="hl-0">((</span><span class="hl-3">err</span><span class="hl-0">) </span><span class="hl-4">=&gt;</span><span class="hl-0"> </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">error</span><span class="hl-0">(</span><span class="hl-6">&#39;error&#39;</span><span class="hl-0">, </span><span class="hl-3">err</span><span class="hl-0">.</span><span class="hl-3">message</span><span class="hl-0">));</span><br/><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;error&#39;</span><span class="hl-0">, </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">Error</span><span class="hl-0">(</span><span class="hl-6">&#39;boom&#39;</span><span class="hl-0">));</span><br/><br/><span class="hl-8">// Prints: ok boom</span>
</code><button>Copy</button></pre>
<p>An <code>AbortSignal</code> can be used to cancel waiting for the event:</p>
<pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">EventEmitter</span><span class="hl-0">, </span><span class="hl-3">once</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ee</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">ac</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">AbortController</span><span class="hl-0">();</span><br/><br/><span class="hl-4">async</span><span class="hl-0"> </span><span class="hl-4">function</span><span class="hl-0"> </span><span class="hl-2">foo</span><span class="hl-0">(</span><span class="hl-3">emitter</span><span class="hl-0">, </span><span class="hl-3">event</span><span class="hl-0">, </span><span class="hl-3">signal</span><span class="hl-0">) {</span><br/><span class="hl-0">  </span><span class="hl-5">try</span><span class="hl-0"> {</span><br/><span class="hl-0">    </span><span class="hl-5">await</span><span class="hl-0"> </span><span class="hl-2">once</span><span class="hl-0">(</span><span class="hl-3">emitter</span><span class="hl-0">, </span><span class="hl-3">event</span><span class="hl-0">, { </span><span class="hl-3">signal</span><span class="hl-0"> });</span><br/><span class="hl-0">    </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">log</span><span class="hl-0">(</span><span class="hl-6">&#39;event emitted!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">  } </span><span class="hl-5">catch</span><span class="hl-0"> (</span><span class="hl-3">error</span><span class="hl-0">) {</span><br/><span class="hl-0">    </span><span class="hl-5">if</span><span class="hl-0"> (</span><span class="hl-3">error</span><span class="hl-0">.</span><span class="hl-3">name</span><span class="hl-0"> === </span><span class="hl-6">&#39;AbortError&#39;</span><span class="hl-0">) {</span><br/><span class="hl-0">      </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">error</span><span class="hl-0">(</span><span class="hl-6">&#39;Waiting for the event was canceled!&#39;</span><span class="hl-0">);</span><br/><span class="hl-0">    } </span><span class="hl-5">else</span><span class="hl-0"> {</span><br/><span class="hl-0">      </span><span class="hl-3">console</span><span class="hl-0">.</span><span class="hl-2">error</span><span class="hl-0">(</span><span class="hl-6">&#39;There was an error&#39;</span><span class="hl-0">, </span><span class="hl-3">error</span><span class="hl-0">.</span><span class="hl-3">message</span><span class="hl-0">);</span><br/><span class="hl-0">    }</span><br/><span class="hl-0">  }</span><br/><span class="hl-0">}</span><br/><br/><span class="hl-2">foo</span><span class="hl-0">(</span><span class="hl-3">ee</span><span class="hl-0">, </span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">, </span><span class="hl-3">ac</span><span class="hl-0">.</span><span class="hl-3">signal</span><span class="hl-0">);</span><br/><span class="hl-3">ac</span><span class="hl-0">.</span><span class="hl-2">abort</span><span class="hl-0">(); </span><span class="hl-8">// Abort waiting for the event</span><br/><span class="hl-3">ee</span><span class="hl-0">.</span><span class="hl-2">emit</span><span class="hl-0">(</span><span class="hl-6">&#39;foo&#39;</span><span class="hl-0">); </span><span class="hl-8">// Prints: Waiting for the event was canceled!</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">_NodeEventTarget</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">symbol</span></h5></li>
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">options</span>: <span class="tsd-signature-type ">StaticEventEmitterOptions</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">&gt;</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v11.13.0, v10.16.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.once</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:189</li></ul></aside></li>
<li class="tsd-signature tsd-anchor-link" id="once-2.once-4"><span class="tsd-kind-call-signature">once</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">emitter</span>, <span class="tsd-kind-parameter">eventName</span>, <span class="tsd-kind-parameter">options</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type ">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">&gt;</span><a href="#once-2.once-4" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><span class="tsd-kind-parameter">emitter</span>: <span class="tsd-signature-type ">_DOMEventTarget</span></h5></li>
<li>
<h5><span class="tsd-kind-parameter">eventName</span>: <span class="tsd-signature-type">string</span></h5></li>
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">options</span>: <span class="tsd-signature-type ">StaticEventEmitterOptions</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">&gt;</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.once</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:190</li></ul></aside></li></ul></section>
<section class="tsd-panel tsd-member tsd-is-inherited tsd-is-external"><a id="setMaxListeners-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>set<wbr/>Max<wbr/>Listeners</span><a href="#setMaxListeners-2" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3>
<ul class="tsd-signatures tsd-is-inherited tsd-is-external">
<li class="tsd-signature tsd-anchor-link" id="setMaxListeners-2.setMaxListeners-3"><span class="tsd-kind-call-signature">set<wbr/>Max<wbr/>Listeners</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">n</span><span class="tsd-signature-symbol">?</span>, <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">eventTargets</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span><a href="#setMaxListeners-2.setMaxListeners-3" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><pre><code class="language-js"><span class="hl-5">import</span><span class="hl-0"> { </span><span class="hl-3">setMaxListeners</span><span class="hl-0">, </span><span class="hl-3">EventEmitter</span><span class="hl-0"> } </span><span class="hl-5">from</span><span class="hl-0"> </span><span class="hl-6">&#39;node:events&#39;</span><span class="hl-0">;</span><br/><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">target</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventTarget</span><span class="hl-0">();</span><br/><span class="hl-4">const</span><span class="hl-0"> </span><span class="hl-7">emitter</span><span class="hl-0"> = </span><span class="hl-4">new</span><span class="hl-0"> </span><span class="hl-2">EventEmitter</span><span class="hl-0">();</span><br/><br/><span class="hl-2">setMaxListeners</span><span class="hl-0">(</span><span class="hl-1">5</span><span class="hl-0">, </span><span class="hl-3">target</span><span class="hl-0">, </span><span class="hl-3">emitter</span><span class="hl-0">);</span>
</code><button>Copy</button></pre>
</div>
<div class="tsd-parameters">
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameter-list">
<li>
<h5><code class="tsd-tag ts-flagOptional">Optional</code> <span class="tsd-kind-parameter">n</span>: <span class="tsd-signature-type">number</span></h5>
<div class="tsd-comment tsd-typography"><p>A non-negative number. The maximum number of listeners per <code>EventTarget</code> event.</p>
</div>
<div class="tsd-comment tsd-typography"></div></li>
<li>
<h5><code class="tsd-tag ts-flagRest">Rest</code> <span class="tsd-signature-symbol">...</span><span class="tsd-kind-parameter">eventTargets</span>: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-type ">EventEmitter</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type ">_DOMEventTarget</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">[]</span></h5></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
<div class="tsd-comment tsd-typography">
<h4>Since</h4><p>v15.4.0</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.setMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.6.2/node_modules/@types/node/events.d.ts:340</li></ul></aside></li></ul></section></section></div>
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