Array fill()Baseline · Widely available

The fill() method of arrays and typed arrays sets all or some items of an array to a given a value.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 20, 2016. Widely available since Mar 20, 2019.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–44Not supported

45+Supportedsince Sep 1, 2015

Current: 155

Edge

12+Supportedsince Jul 29, 2015

Current: 154

Firefox

1–36Not supported

37+Supportedsince Mar 31, 2015

Current: 157

Safari

1–9.1Not supported

10+Supportedsince Sep 20, 2016

Current: 27

MobileChrome Android

18–44Not supported

45+Supportedsince Sep 1, 2015

Current: 155

Firefox Android

4–36Not supported

37+Supportedsince Mar 31, 2015

Current: 157

Safari iOS

1–9.3Not supported

10+Supportedsince Sep 13, 2016

Current: 27

How to use

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

Example

Full syntax and examples are on MDN: fill.

Feature detection

JS · check before using

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

Documentation (MDN)

Specification

Sub-features

Support for each part of the feature (2). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Array.fill	45	12	31	8	45	31	8
TypedArray.fill	45	12	37	10	45	37	10