Understanding JavaScript promise object - Stack Overflow
Sep 13, 2016 · Summary: A promise in Javascript is an object which represent the eventual completion or failure of an asynchronous operation. Promises represent a proxy for a value …
javascript - How do I wait for a promise to finish before returning …
I'm still struggling with promises, but making some progress thanks to the community here. I have a simple JS function which queries a Parse database. It's supposed to return the array of …
javascript - How to pass parameter to a Promise? - Stack Overflow
Feb 10, 2016 · This might seem a silly question but I am a newbie in this topic. I am working with Promises on Nodejs and I want to pass a parameter to a Promise function. However I could …
javascript - Wait for multiple promises to finish - Stack Overflow
Use Promise.all (): The Promise.all (iterable) method returns a promise that resolves when all of the promises in the iterable argument have resolved, or rejects with the reason of the first …
javascript - Promise - is it possible to force cancel a promise
May 14, 2015 · Here #2 naturally takes precedence over #1 so I would like to cancel the Promise wrapping request #1. I already have a cache of all Promises in the data layer so I can …
Exactly when were JavaScript promises created? - Stack Overflow
Dec 3, 2017 · I have been using promises for a while in my React code. But I have to include the babel polyfill library to support promises and map function for browsers which do not support …
javascript - How do I await multiple promises in-parallel without …
I'm using async / await to fire several api calls in parallel: async function foo(arr) { const results = await Promise.all(arr.map(v => { return doAsyncThing(v) })) return results } I know that, unlike …
JavaScript ES6 promise for loop - Stack Overflow
Oct 30, 2016 · After the loop completes, execute the Promise all statement with the prepared array of such queries/promises as argument. The basic concept is that the javascript loop is …
Javascript push a promise into an array - Stack Overflow
Nov 6, 2017 · I'm trying to create an array of promises and call them with Promise.all. I'm having trouble with correctly pushing the functions into the array, it seems they are being called …
Correct way to write loops for promise. - Stack Overflow
How to correctly construct a loop to make sure the following promise call and the chained logger.log(res) runs synchronously through iteration? (bluebird) …