没有回调的 JavaScript 原生 Promise() [英] JavaScript native Promise() without callback

问题描述

看看这个 jQuery 代码:

Look at this jQuery code:

var promise = new Deferred(),
    some;

some = function(promise) {
    // do cool things

    promise.resolve();
};

promise.then(/*  callback cool things   */);

// init everything
some(promise);

我不确定这种方法的架构正确性，但我使用了很长时间，对我来说很方便.

I am not sure about architecture correctness of such approach, but I used it for long time and it is convenient for me.

在原生 JavaScript 中，我不能使用这种方法.构造函数 new Promise() 需要回调参数，所以我不能将 Promise 的实例作为参数传递.

In native JavaScript I can not use such approach. Constructor new Promise() requires a callback parameter, so I can not pass instance of Promise as a parameter.

所以我的问题是:如何预定义 JavaScript 本机承诺，将其作为参数传递给函数和解析?

So my question is: how can I predefine JavaScript native promise, pass it as a parameter to function and the resolve?

推荐答案

执行流程会有些不同，但基本上都是一样的:

The execution flow would be a little different, but basically work the same way:

function some(resolve, reject) {
    resolve();
}

var promise = new Promise(some);

promise.then(/*  callback cool things   */);

它没有通过 some 本身，而是通过 resolve 和 reject 函数.所以，依赖正好相反.

Instead of some getting passed the promise itself, it gets passed the resolve and reject functions. So, the dependency is just the other way round.

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