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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></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/4c0e63f/src/pools/pool.ts#L35">src/pools/pool.ts:35</a></li></ul></aside>
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<details class="tsd-index-content tsd-index-accordion" open><summary class="tsd-accordion-summary tsd-index-summary">
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<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" width="24" height="24" viewBox="0 0 24 24"><rect fill="var(--color-icon-background)" stroke="#4D7FFF" stroke-width="1.5" x="1" y="1" width="22" height="22" rx="12" id="icon-512-path"></rect><path d="M11.898 16.1201C11.098 16.1201 10.466 15.8961 10.002 15.4481C9.53803 15.0001 9.30603 14.3841 9.30603 13.6001V9.64012C9.30603 8.85612 9.53803 8.24012 10.002 7.79212C10.466 7.34412 11.098 7.12012 11.898 7.12012C12.682 7.12012 13.306 7.34812 13.77 7.80412C14.234 8.25212 14.466 8.86412 14.466 9.64012H13.386C13.386 9.14412 13.254 8.76412 12.99 8.50012C12.734 8.22812 12.37 8.09212 11.898 8.09212C11.426 8.09212 11.054 8.22412 10.782 8.48812C10.518 8.75212 10.386 9.13212 10.386 9.62812V13.6001C10.386 14.0961 10.518 14.4801 10.782 14.7521C11.054 15.0161 11.426 15.1481 11.898 15.1481C12.37 15.1481 12.734 15.0161 12.99 14.7521C13.254 14.4801 13.386 14.0961 13.386 13.6001H14.466C14.466 14.3761 14.234 14.9921 13.77 15.4481C13.306 15.8961 12.682 16.1201 11.898 16.1201Z" fill="var(--color-text)" id="icon-512-text"></path></svg><span>constructor</span></a>
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<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" width="24" height="24" viewBox="0 0 24 24"><rect fill="var(--color-icon-background)" stroke="#FF984D" stroke-width="1.5" x="1" y="1" width="22" height="22" rx="12" id="icon-1024-path"></rect><path d="M9.354 16V7.24H12.174C12.99 7.24 13.638 7.476 14.118 7.948C14.606 8.412 14.85 9.036 14.85 9.82C14.85 10.604 14.606 11.232 14.118 11.704C13.638 12.168 12.99 12.4 12.174 12.4H10.434V16H9.354ZM10.434 11.428H12.174C12.646 11.428 13.022 11.284 13.302 10.996C13.59 10.7 13.734 10.308 13.734 9.82C13.734 9.324 13.59 8.932 13.302 8.644C13.022 8.356 12.646 8.212 12.174 8.212H10.434V11.428Z" fill="var(--color-text)" id="icon-1024-text"></path></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-1024-path"></use><use href="#icon-1024-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-1024-path"></use><use href="#icon-1024-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-1024-path"></use><use href="#icon-1024-text"></use></svg><span>error<wbr/>Monitor</span></a>
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<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" width="24" height="24" viewBox="0 0 24 24"><rect fill="var(--color-icon-background)" stroke="#FF4DB8" stroke-width="1.5" x="1" y="1" width="22" height="22" rx="12" id="icon-2048-path"></rect><path d="M9.162 16V7.24H10.578L11.514 10.072C11.602 10.328 11.674 10.584 11.73 10.84C11.794 11.088 11.842 11.28 11.874 11.416C11.906 11.28 11.954 11.088 12.018 10.84C12.082 10.584 12.154 10.324 12.234 10.06L13.122 7.24H14.538V16H13.482V12.82C13.482 12.468 13.49 12.068 13.506 11.62C13.53 11.172 13.558 10.716 13.59 10.252C13.622 9.78 13.654 9.332 13.686 8.908C13.726 8.476 13.762 8.1 13.794 7.78L12.366 12.16H11.334L9.894 7.78C9.934 8.092 9.97 8.456 10.002 8.872C10.042 9.28 10.078 9.716 10.11 10.18C10.142 10.636 10.166 11.092 10.182 11.548C10.206 12.004 10.218 12.428 10.218 12.82V16H9.162Z" fill="var(--color-text)" id="icon-2048-text"></path></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></use></svg><span>set<wbr/>Max<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#getEventListeners" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></use></svg><span>get<wbr/>Event<wbr/>Listeners</span></a>
<a href="PoolEmitter.html#listenerCount-2" class="tsd-index-link tsd-is-inherited tsd-is-external"><svg class="tsd-kind-icon" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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" width="24" height="24" viewBox="0 0 24 24"><use href="#icon-2048-path"></use><use href="#icon-2048-text"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none" id="icon-anchor-a"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5" id="icon-anchor-b"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5" id="icon-anchor-c"></path></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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@20.1.0/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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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><aside class="tsd-sources">
<p>Inherited from EventEmitter.captureRejectionSymbol</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:322</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>Sets or gets the default captureRejection value for all emitters.</p>
</div><aside class="tsd-sources">
<p>Inherited from EventEmitter.captureRejections</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:327</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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><aside class="tsd-sources">
<p>Inherited from EventEmitter.defaultMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:328</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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><aside class="tsd-sources">
<p>Inherited from EventEmitter.errorMonitor</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:321</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Alias for <code>emitter.on(eventName, listener)</code>.</p>

<h3>Since</h3><p>v0.1.26</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.addListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:348</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.1.26</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><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><aside class="tsd-sources">
<p>Inherited from EventEmitter.emit</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:610</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v6.0.0</p>
</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.eventNames</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:673</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v1.0.0</p>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.getMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:525</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v3.2.0</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></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></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.listenerCount</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:619</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.1.26</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></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.listeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:538</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></use></svg></a></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>Alias for <code>emitter.removeListener()</code>.</p>

<h3>Since</h3><p>v10.0.0</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.off</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:498</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.1.101</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></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>
<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><aside class="tsd-sources">
<p>Inherited from EventEmitter.on</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:380</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.3.0</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></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>
<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><aside class="tsd-sources">
<p>Inherited from EventEmitter.once</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:410</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v6.0.0</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></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>
<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><aside class="tsd-sources">
<p>Inherited from EventEmitter.prependListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:637</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v6.0.0</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></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>
<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><aside class="tsd-sources">
<p>Inherited from EventEmitter.prependOnceListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:653</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v9.4.0</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></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type ">Function</span><span class="tsd-signature-symbol">[]</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.rawListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:569</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.1.26</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.removeAllListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:509</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.1.26</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.removeListener</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:493</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.3.5</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><aside class="tsd-sources">
<p>Inherited from EventEmitter.setMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:519</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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v15.2.0, v14.17.0</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">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><aside class="tsd-sources">
<p>Inherited from EventEmitter.getEventListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/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="listenerCount-2" class="tsd-anchor"></a>
<h3 class="tsd-anchor-link"><code class="tsd-tag ts-flagStatic">Static</code> <span>listener<wbr/>Count</span><a href="#listenerCount-2" aria-label="Permalink" class="tsd-anchor-icon"><svg class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v0.9.12</p>

<h3>Deprecated</h3><p>Since v3.2.0 - Use <code>listenerCount</code> instead.</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">emitter</span>: <span class="tsd-signature-type ">EventEmitter</span></h5>
<div class="tsd-comment tsd-typography"><p>The emitter to query</p>
</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></li></ul></div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4><aside class="tsd-sources">
<p>Inherited from EventEmitter.listenerCount</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v13.6.0, v12.16.0</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">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></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>
<aside class="tsd-sources">
<p>Inherited from EventEmitter.on</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v11.13.0, v10.16.0</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">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><aside class="tsd-sources">
<p>Inherited from EventEmitter.once</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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@20.1.0/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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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 class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><use href="#icon-anchor-a"></use><use href="#icon-anchor-b"></use><use href="#icon-anchor-c"></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>

<h3>Since</h3><p>v15.4.0</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">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></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><aside class="tsd-sources">
<p>Inherited from EventEmitter.setMaxListeners</p>
<ul>
<li>Defined in node_modules/.pnpm/@types+node@20.1.0/node_modules/@types/node/events.d.ts:311</li></ul></aside></li></ul></section></section></div>
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