Use EventEmitter in ES6 class

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栀梦
栀梦 2021-02-18 13:07

I am trying to get the EventEmitter in my own class running in ES6:

\"use strict\";
const EventEmitter = require(\'events\');

class Client extends EventEmitter{         


        
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  • 2021-02-18 13:52

    You could use process.nextTick() to make you code asynchronous. Afterwards everything will work as expected. This is the note from the node documentation:

    The process.nextTick() method adds the callback to the "next tick queue". Once the current turn of the event loop turn runs to completion, all callbacks currently in the next tick queue will be called.

    eventTest(){
        process.nextTick(() => {
            this.emit("event");
        });
        console.log(this.token);
    }
    
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  • 2021-02-18 14:07

    Events are synchronous - you're firing it before you are listening. Use

    const testClient = new Client(1,2,3,4,5);
    testClient.on('event', () => {console.log('triggered!')} );
    testClient.eventTest();
    
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