解析函数范围外的 Javascript Promise [英] Resolve Javascript Promise outside function scope

问题描述

我一直在使用 ES6 Promise.

I have been using ES6 Promise.

一般来说，一个 Promise 是这样构造和使用的

Ordinarily, a Promise is constructed and used like this

new Promise(function(resolve, reject){
    if (someCondition){
        resolve();
    } else {
        reject();
    } 
});

但为了灵活起见，我一直在做类似下面的事情来解决问题.

But I have been doing something like below to take the resolve outside for the sake of flexibility.

var outsideResolve;
var outsideReject;
new Promise(function(resolve, reject) { 
    outsideResolve = resolve; 
    outsideReject = reject; 
});

以后

onClick = function(){
    outsideResolve();
}

这很好用，但有没有更简单的方法来做到这一点?如果不是，这是一个好习惯吗?

This works fine, but is there an easier way to do this? If not, is this a good practice?

推荐答案

简单:

var promiseResolve, promiseReject;

var promise = new Promise(function(resolve, reject){
  promiseResolve = resolve;
  promiseReject = reject;
});

promiseResolve();

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