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Js Promise All Map
This returned promise will resolve when all of the input's promises have resolved, or if the input iterable contains no promises. (async () => { const items = [1, 2, 3] const vals = await promise.all (items.map (async (it) => it * 2)) console.log (vals) }) () to calls items.map with an async function as the callback. You would use promise.all () on the array of returned promises to know when they are all done and/or to collect their resolved results.
Javascript Promise.all() Function: The Complete Guide from appdividend.com
Here the promise.all () method waits till all the promises resolve. Here, promise.all () method is the order of the maintained promises. That's where promises.all () comes in.
You can do the same thing with a for loop if you want.
Promises.all () collects a bunch of promises, and rolls them up into a single promise. Here, promise.all () method is the order of the maintained promises. Fyi,.map () is just a plain loop. As a result, you are returning an array of promises.
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