javascript 中的 resolve, reject 关键字是什么？

Question

const promise = new Promise((resolve, reject) => {
  if(allWentWell) {
    resolve('All things went well!');
  } else {
    reject('Something went wrong');
  }
});

我可以将resolve更改为res吗？ 或者resolve在这里有什么特殊含义吗？

Answer 1

不，它们不是关键字，您可以随意命名它们，但 IMO 您应该尽可能保持名称的描述性。

 const promise = new Promise((res, rej) => { if(true) { res('All things went well;'); } else { rej('Something went wrong'); } }). promise.then(val=> console.log(val))

Answer 2

No. The Promise constructor expects a function and will pass two arguments to it: the first one being a function that resolves the promise, and the second one being a function that rejects the promise. 话虽如此，您可以随意命名这些 arguments，但它们的顺序必须正确。

const myFunction = function (x, y) {
  if (allWentWell) {
    x('All things went well!')
  } else {
    y('Something went wrong')
  }
}

new Promise(myFunction)

我想说这是一个很好的做法，尽管将它们命名为resolve和reject ，因为 web 上的大多数示例都使用它，所以程序员最终会期待它。