Array findLast() and findLastIndex()Baseline · Widely available

The findLast() and findLastIndex() methods of arrays and typed arrays search an array in reverse order for the first item that satisfies a test function.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Aug 23, 2022. Widely available since Feb 23, 2025.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–96Not supported

97+Supportedsince Jan 4, 2022

Current: 155

Edge

12–96Not supported

97+Supportedsince Jan 6, 2022

Current: 154

Firefox

1–103Not supported

104+Supportedsince Aug 23, 2022

Current: 157

Safari

1–15.3Not supported

15.4+Supportedsince Mar 14, 2022

Current: 27

MobileChrome Android

18–96Not supported

97+Supportedsince Jan 4, 2022

Current: 155

Firefox Android

4–103Not supported

104+Supportedsince Aug 23, 2022

Current: 157

Safari iOS

1–15.3Not supported

15.4+Supportedsince Mar 14, 2022

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

const events = [{ ok: true }, { ok: false, id: 2 }, { ok: false, id: 3 }];
events.findLast((e) => !e.ok);      // { ok: false, id: 3 }
events.findLastIndex((e) => !e.ok); // 2

Feature detection

JS · check before using

if ("findLast" in Array || ("prototype" in Array && "findLast" in Array.prototype)) {
  // Array.findLast is available
}

Documentation (MDN)

Specification

Sub-features

Support for each part of the feature (4). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Array.findLast	97	97	104	15.4	97	104	15.4
Array.findLastIndex	97	97	104	15.4	97	104	15.4
TypedArray.findLast	97	97	104	15.4	97	104	15.4
TypedArray.findLastIndex	97	97	104	15.4	97	104	15.4