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PROMISE definition: 1. to tell someone that you will certainly do something: 2. If something promises to be good…. Learn more.
Jul 7, 2012 · promise: [noun] a declaration that one will do or refrain from doing something specified. a legally binding declaration that gives the person to whom it is made a right to expect or to claim the performance or forbearance of a specified act.
promise翻译：肯定地说, 允诺，答应;保证, 预计, 肯定地说, 允诺;诺言;保证, 预计, （成功的）迹象，征兆；（有）出息，（有）前途。了解更多。
4 days ago · Promise.all() Takes an iterable of promises as input and returns a single Promise.This returned promise fulfills when all of the input's promises fulfill (including when an empty iterable is passed), with an array of the fulfillment values.
A Promise is an Object that links Producing code and Consuming code. JavaScript Promise Object. A Promise contains both the producing code and calls to the consuming code: Promise Syntax. let myPromise = new Promise(function(myResolve, myReject) {// "Producing Code" (May take some time)
Jan 15, 2020 · Promise.all(iterable) is very usefull for multiple request to different source. The Promise.all(iterable) method returns a single Promise that resolves when all of the promises in the iterable argument have resolved or when the iterable argument contains no promises. It rejects with the reason of the first promise that rejects.
Promise.all takes an iterable (usually, an array of promises) and returns a new promise.. The new promise resolves when all listed promises are resolved, and the array of their results becomes its result. For instance, the Promise.all below settles after 3 seconds, and then its result is an array [1, 2, 3]:
Dec 16, 2013 · Although promise implementations follow a standardized behaviour, their overall APIs differ. JavaScript promises are similar in API to RSVP.js. Here's how you create a promise: var promise = new Promise(function(resolve, reject) { // do a thing, possibly async, then…
What is a promise? The core idea behind promises is that a promise represents the result of an asynchronous operation. A promise is in one of three different states: pending - The initial state of a promise. fulfilled - The state of a promise representing a successful operation. rejected - The state of a promise representing a failed operation.
Jul 21, 2017 · It creates a promise that will be fulfilled, using window.setTimeout(), to the promise count (number starting from 1) every 1-3 seconds, at random. The Promise() constructor is used to create the promise. The fulfillment of the promise is simply logged, via a fulfill callback set using p1.then().
