Mapping Array Elements Asynchronously in JavaScript using map() and Callback

Async Function In Map Javascript. How to return a value from an async function in JavaScript How to Use async/await inside map() in JavaScript I recently needed to use async / await inside a map function You want to execute an async function inside a map() call, to perform an operation on every element of the array, and get the results back.

It waits for all promises to resolve and returns their results usernames.map(async (username) => {return await simulateFetchData(username);}) returns an array of promises, just what we need so we pass it to Promise.all to resolve them

Async Await in Node.js How to Master it? RisingStack Engineering

Combining And Resolving all Promises with Promise.all(), map() and Async/Await It waits for all promises to resolve and returns their results First, it needs to map every item to a Promise with the new value, which is what adding async before the function does

Node.js Tutorial — Run an Async Function in Array.map() YouTube. So I changed the code accordingly, primarily by adding Promise.all() and - voila, it started to work: usernames.map(async (username) => {return await simulateFetchData(username);}) returns an array of promises, just what we need so we pass it to Promise.all to resolve them

22 Javascript Async Await Class Method Javascript Info. However, the returned result by .map() is no promise, but an array of promises So unlike the for of, let's see how long it takes to execute this function in the console: