JavaScript Info

I played with promises a few times a few years ago using either jQuery or Q. I'm now quite rust… Read more "waiting" On Either A Promise Or Regular Object Using Native(es6) Javascript Promises

I am new to JavaScript and I really got confused by the documentation about promises. I have the fo… Read more How To Make A Promise Resolve With A Specific Condition?

Say I have a function that returns a resolved promise like this: let a = () => {return new Promi… Read more Js Promises: If A Handler In A `then` Block Returns A Value Vs Returning A Resolved Promise, Does The `then` Block Handle It The Same Way?

I'm trying to create a function which sends HTTP requests with the following logic: If there a… Read more How To Get The Number Of Pending Promises?

I looked at many examples today. They seem to suggest that the following code should be executed in… Read more Promise Not Waiting To Finish

I have a code that searches for some data in memory storage and if not found searches that data on … Read more How To Wrap Object In A Promise?

I have the following code: function myPromiseFunc() { return new Promise((resolve) => { re… Read more Is Resolve Function Passed To Promise Executor Async?

I want to clarify for which http status codes the promise from $http is resolved and for which it i… Read more For Which Status Codes Does The Promise Resolve

I am under the impression that these two things are not equivalent: return somePromise() .then() … Read more How To Properly Catch Errors In Promises?

I know that a thenable has the then method, but how does Promise know the state of the thenable obj… Read more How Does A Thenable Object Get Rejected In Javascript?

I tried to build easy app to build img-parser and started to use library image-scraper(node-image-s… Read more Image-scraper Nodejs. How To Send Callback Function To Result Array

I'm a bit of a novice with promises/Deferreds. Is there a good pattern to handle the case where… Read more Is There A Good Way Of Short Circuiting Javascript Promises?

I have a db.js set up to do all my database calls. This is an example of one of the functions that … Read more How Can I Make A Promise Reject For Testing?

I´m runnig into CORS issues. In my functions/index.js I have: const cors = require('cors')(… Read more How To Solve Cors In Firebase Functions Enviroment?

I'm toying with promises in JavaScript and tried to promisify setTimeout function: function tim… Read more How To Cancel Timeout Inside Of Javascript Promise?

I am using the code below to remove all docs in a collection in Firestore. My question is, how to e… Read more Return All Docs When All Docs Are Deleted In A Collection In Firestore

I have an array of links, but executing them in parallel like this makes the server hang up and tim… Read more Running Promises In Array In Series

Lets say, for example, I have three promises. One that will take 1000ms to resolve, another that ta… Read more How Do I Resolve Multiple Promises As They Resolve?

To begin with, I am taking a follow up from this question I posted few moments ago Now, I thought I… Read more How To Handle Error And Use Promises Correctly

I have been reading up on methods to implement a polling function and found a great article on http… Read more Incorporating Async Actions, Promise.then() And Recursive Settimeout Whilst Avoiding "deferred Antipattern"