小编Dav*_*071的帖子

我有一个关于events.EventEmitterNode.js的问题，为什么要使用它？示例1和示例2有什么区别？我发现它们完全相同，是吗？什么时候可以使用它？

let events = require("events");
let util = require("util");
let eventEmitter = new events.EventEmitter();

示例 1 与EventEmitter：

let Student = function(name) {
    this.name = name;
}

util.inherits(Student, events.EventEmitter);

let student_max = new Student('max');

student_max.on('scored', function(points) {
    if (points > 90) {
        points = points + ' wow you scored more than 90'
    }
    console.log(`${this.name} ${points} points`);
})

student_max.emit('scored',95);

示例 2 不带 EventEmitter

let Student2 = function(name) {
    this.name = name;
    this.score = function(str,points) {
        if (str!=='scored') …