+
+ protected isRequest(message: JsonType[]): boolean {
+ return Array.isArray(message) && message.length === 3;
+ }
+
+ protected isResponse(message: JsonType[]): boolean {
+ return Array.isArray(message) && message.length === 2;
+ }
+
+ protected validateMessageEvent(messageEvent: MessageEvent): MessageEvent {
+ if (Array.isArray(messageEvent.data) === false) {
+ throw new BaseError('Worker broadcast channel protocol message event data is not an array');
+ }
+ return messageEvent;
+ }