Sep 13, 2016 · 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 which are getting in some point …

Mar 24, 2016 · Estava pesquisando sobre callback em JavaScript quando achei esta questão: Como realmente aprender a usar promises (promessas) em javascript? Mas afinal : O que são promessas? …

Sep 14, 2019 · The only drawback from having a mix of promises and async functions might be readability and maintainability of the code, but you can certainly use the return value of async …

Jul 19, 2016 · I'm trying to understand Promises from the MDN documentation. The first example demonstrates the then and catch methods: // We define what to do when the promise is …

And, for clarity, the return value of the function doSomething in this example is still a promise - because async functions return promises. So if you wanted to access that return value, you would have to do …

Dec 22, 2015 · For simple queries and data manipulation, Promises can be simple, but if you run into scenarios where there's complex data manipulation and whatnot involved, it's easier to understand …

Jun 1, 2015 · Because JavaScript is single-threaded, it's hard to find a common enough use case to justify putting this in the spec. The best place to know if a promise is resolved is in .then (). Testing if …

How do I await multiple promises in-parallel without 'fail-fast' behavior? [duplicate] Asked 9 years, 1 month ago Modified 11 months ago Viewed 159k times

For now the first function doesn't return promises. That I have to implement. I want to edit my message to add some details of the workflow of my functions. And yes I need that all the stuff of the first loop …

promise.all takes an array of promise objects, created from the return values of functions you have called already. "Now, I can put all functions in an array and can do Promise.all (array of functions)" …