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TomVista
V2EX    Node.js

node EventEmitter

  •   
  •   TomVista 2020-05-14 11:19:14 +08:00 4705 次点击
    这是一个创建于 2050 天前的主题，其中的信息可能已经有所发展或是发生改变。

    想在 event.emmit('eventName') 执行完异步事件之后 触发一个 end 事件,怎么做?

    暴露 event 给 listener 吗?

    const event = new (require('events').EventEmitter) event.on('name',(event)=>{ // dosomething setTimeout(()=>{ ... event.emmit('nameEnd') },100) }) event.on('nameEnd',()=>{ console.log(name) }) event.emmit('name',event)
  • event
  • emmit
  • nameend'
  • name'
    1 条回复    2020-05-15 12:04:21 +08:00
    JayLin1011
        1
    JayLin1011  
       2020-05-15 12:04:21 +08:00   1
    const EventEmitter = require('events');

    const event = new EventEmitter();

    event.on('eventEnd', () => {
    console.log('步事件行後 eventEnd 事件');
    });

    event.on('eventAsync', function () {
    setImmediate(() => {
    console.log('步事件');
    // to do...
    this.emit('eventEnd');
    });
    });

    event.emit('eventAsync');
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