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Arrays Newly available

Array.fromAsync()

The Array.fromAsync() static method copies items from an async iterable object to make a new array.

Arrays

Overview

The Array.fromAsync() static method copies items from an async iterable object to make a new array.

Browser support

Feature Desktop Mobile
Chrome
Edge
Firefox
Safari
Chrome Android
Safari iOS
javascript.builtins.Array.fromAsync
121
121
115
16.4
121
16.4
1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)

Syntax

JAVASCRIPT 
async function* asyncRange(n) {
  for (let i = 0; i < n; i++) yield i;
}

const arr = await Array.fromAsync(asyncRange(5));
// [0, 1, 2, 3, 4]

Live demo

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Use cases

  • Using Array.fromAsync()

    The Array.fromAsync() static method copies items from an async iterable object to make a new array.

Cautions

  • Not supported in older browsers. Verify your target environments before adopting.

Accessibility

  • When updating the DOM dynamically, announce important changes to assistive technology with aria-live regions.

Related links

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