Widely availableSupported across all major browsers. Safe to use in production.
Arrays Widely available

Array fill()

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

Arrays

Overview

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

Browser support

Feature Desktop Mobile
Chrome
Edge
Firefox
Safari
Chrome Android
Safari iOS
javascript.builtins.Array.fill
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Built-in object
TypedArray.fill

The fill() method of TypedArray instances changes all elements within a range of indices in a typed array to a static value. It returns the modified typed array. This method has the same algorithm as Array.prototype.fill().
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1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)

Syntax

JAVASCRIPT 
// Initializing an array
new Array(5).fill(0); // [0, 0, 0, 0, 0]

// Partially filling an array
[1, 2, 3, 4, 5].fill(9, 2, 4); // [1, 2, 9, 9, 5]

Live demo

Array. initialize

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range specifiedfill

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de-ta. initialize(reset)

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Use cases

  • Using Array fill()

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

Cautions

  • No specific concerns. Stable across all major browsers.

Accessibility

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

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