JavaScript es de un solo hilo, es decir, dos porciones de secuencia de comandos no se pueden ejecutar al mismo tiempo, tienen que ejecutarse uno después del otro. En navegadores, …

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 …

It's supposed to return the array of results, but obviously due to the asynchronous nature of the query (hence the promises), the function returns before the results, leaving me with an …

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 …

This is not a realworld problem, I'm just trying to understand how promises are created. I need to understand how to make a promise for a function that returns nothing, like setTimeout. …

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 …

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 …

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 …

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 (). …

Nov 20, 2013 · This is precisely how you make promises sequential, by returning the later promise from the then of the promise that should finish before it. It is helpful to think of such a …