Async/await inside loops in JavaScript

#javascript #tutorial #video #webdev

This is a video tutorial based on my earlier post in Dev.to. You can find written tutorial in the link below. Enjoy the video and let me know if you have any feedback.

Written tutorial

How to use async/await inside loops in JavaScript

Shadid Haque ・ Oct 2 '21

#javascript #webdev #tutorial #codenewbie

Top comments (4)

yathink3 • Nov 13 '21 • Edited

i think best way to achieve this making prototype function and then good to go

Array.prototype.forAsyncSerial = async function (fn = null) {
let result = [];
for (let i = 0; i < this.length; i++) {
if (typeof fn !== 'function') result[i] = await this[i];
else result[i] = await fn(this[i], i);
}
return result;
};

Array.prototype.forAsyncParallel = async function (fn = null) {
if (typeof fn !== 'function') return await Promise.all(this);
else return await Promise.all(this.map(fn));
};