JavaScript Apprenticeships

This is part of a larger process that I've distilled down to the minimal, reproducible example … Read more Why Does This Readline Async Iterator Not Work Properly?

I'm learning about promises and I absolutely want to make sure I am understanding their use bef… Read more Using Resolved Promise Data Synchronously

With an Array of Promises how do I wait until they have all resolved before proceeding? Below is an… Read more Waiting For Promises To Resolve Within An Array

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

My models has lot of relationship between each object and when I want to search some data I have to… Read more Mongoose Multiple Synchronous Find To Reuse Object Id

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 need to utilize a key stored in my firebase using the user's firebase user id. The steps to … Read more How Do I Use Javascript Promise Chaining With Firebase Authentication And Firebase?

So.. I'm having the hardest time learning how to Promise. I'm using bluebird (https://githu… Read more I Broke My Promise

I am using AngularJS here, but if you have a more generic answer I’ll be glad to know about it. I h… Read more How To Assign The Result Of A Promise To Array Elements Using .map()?

Lately I've been stuck with a problem that I don't know how to solve. I asked this question… Read more Javascript - How To Use Promises In Firebase?

I've been puzzling for quite a while trying to wrap my head around JavaScript promises. I want … Read more How To Use Jquery Deferred (when/then, Etc.) To Fix Asynchroneous Pyramid Of Doom Issue

I have some async code that needs to stop in case of error but keeps executing: async saveCoupons({… Read more Promise Continues After Error

I've been playing with promises, and usually can figure out how to handle them well, but in thi… Read more Promise Of Promise To Simple Promise?

I have a complex SVG that is drawn to a canvas, and this task needs to complete before other object… Read more Why Is My Javascript Promise Stuck As "pending"?

I have an object like so: let myObject = { 'db1': [db1_file1Id,db1_file2Id,db_1file3Id], &#… Read more Iterating Javascript Object Synchronously

How does work this promise chain? Promise.resolve(1) .then(x => console.log(1)) .catch(x =&g… Read more Promise Chain .then .catch

Browser reads and runs a JavaScript file, the synchronous tasks written in the file immediately bec… Read more When Will Requestanimationframe Be Executed?

In my code, I am using Promise.all() to run code asynchronously once some promises have all fulfill… Read more Promise.all Find Which Promise Rejected

How to chain ES6 nested Promises with each Promise in the nesting having then and catch blocks? F… Read more How To Chain Nested Promises Containing Then And Catch Blocks?

in my application, I have and array of promises that access network in parallel, but some times, wh… Read more Javascript - How To Control How Many Promises Access Network In Parallel