javascript 中的 resolve, reject 關鍵字是什么？

Question

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

我可以將resolve更改為res嗎？ 或者resolve在這里有什么特殊含義嗎？

Answer 1

不，它們不是關鍵字，您可以隨意命名它們，但 IMO 您應該盡可能保持名稱的描述性。

 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. 話雖如此，您可以隨意命名這些 arguments，但它們的順序必須正確。

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

new Promise(myFunction)

我想說這是一個很好的做法，盡管將它們命名為resolve和reject ，因為 web 上的大多數示例都使用它，所以程序員最終會期待它。