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TypedArray.prototype.fill()

The fill() method fills all the elements of a typed array from a start index to an end index with a static value. This method has the same algorithm as Array.prototype.fill(). TypedArray is one of the typed array types here.

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Syntax

fill(value)
fill(value, start)
fill(value, start, end)

Parameters

value: Value to fill the typed array with.
start Optional: Start index. Defaults to 0.
end Optional: End index (not included). Defaults to this.length.

Return value

The modified array.

Description

The elements interval to fill is [start, end).

The fill() method takes up to three arguments value, start and end. The start and end arguments are optional with default values of 0 and the length of the this object.

If start is negative, it is treated as length+start where length is the length of the array. If end is negative, it is treated as length+end.

Examples

Using fill()

new Uint8Array([1, 2, 3]).fill(4);         // Uint8Array [4, 4, 4]
new Uint8Array([1, 2, 3]).fill(4, 1);      // Uint8Array [1, 4, 4]
new Uint8Array([1, 2, 3]).fill(4, 1, 2);   // Uint8Array [1, 4, 3]
new Uint8Array([1, 2, 3]).fill(4, 1, 1);   // Uint8Array [1, 2, 3]
new Uint8Array([1, 2, 3]).fill(4, -3, -2); // Uint8Array [4, 2, 3]

Specifications

Specification
ECMAScript Language Specification # sec-%typedarray%.prototype.fill

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`fill`	45	12	37	No	32	9.1	No	45	37	32	9.3	5.0	1.0	4.0.0