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21 de jul. de 2017 · Using promises. In This Article. A Promise is an object representing the eventual completion or failure of an asynchronous operation. A promise may be created using its constructor. However, most people are consumers of already-created promises returned from functions. This guide will therefore explore consumption of returned promises first.
6 de dic. de 2023 · To take advantage of the readability improvement and language features offered by promises, the Promise() constructor allows one to transform the callback-based API to a promise-based one. Note: If your task is already promise-based, you likely do not need the Promise() constructor. The executor is custom code that ties an outcome in a callback ...
29 de dic. de 2023 · Промис (Promise) — специальный объект JavaScript, который используется для написания и обработки асинхронного кода. Асинхронные функции возвращают объект Promise в качестве значения. Внутри промиса ...
promise noun volume_up US /ˈprɑməs/ • volume_up UK /ˈprɒmɪs/ 1. (countable) (pledge) promesa (feminine) he made a promise that he would return prometió que volvería I'll see what I can do, but I can't make any promises veré lo que puedo hacer, pero no puedo prometer nada to keep one's promise cumplir (con) su (or mi etc.) promesa you broke your promise no cumpliste (con) tu promesa ...
PROMISE definition: 1. to tell someone that you will certainly do something: 2. If something promises to be good…. Learn more.
11 de feb. de 2022 · 2.1 什么是 Promise. Promise 是一个类，可以翻译为承诺、期约. 当通过 new 创建 Promise 实例时，需要传入一个回调函数，我们称之为 executor. 这个回调函数会被立刻执行，并传入两个回调参数 resolve 、 reject. 当调用 resolve 回调函数时，会执行 Promise 对象的 then 方法传入 ...
