JavaScript-Promise-Lite

JavaScript-Promise-Lite.js

function MyPromise(fn) {
    this.resolve;
    this.reject;
    _this = this;
    setTimeout(function () {
        fn(_this.resolveFunc.bind(_this), _this.rejectFunc.bind(_this));
    }, 0)
}

MyPromise.prototype = {
    then: function (resolve, reject) {
        this.resolve = resolve;
        this.reject = reject;
    },
    resolveFunc: function (value) {
        this.resolve(value);
    },
    rejectFunc: function (value) {
        this.reject(value);
    }
}


new MyPromise(function (resolve, reject) {
    var flag = Math.round(Math.random())
    if (flag) {
        resolve(flag);
    } else {
        reject(flag);
    }
}).then(function (resolve) {
    console.log(resolve);
}, function (reject) {
    console.log(reject);
})