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.
TypedArray.prototype.fill()
Try it
Syntax
fill(value) fill(value, start) fill(value, start, end)
Parameters
-
value -
Value to fill the typed array with.
-
startOptional -
Start index. Defaults to 0.
-
endOptional -
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]
Polyfill
Since there is no global object with the name TypedArray, polyfilling must be done on an "as needed" basis. Use the following "polyfill" along with the Array.prototype.fill() polyfill.
// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill if (!Uint8Array.prototype.fill) { Uint8Array.prototype.fill = Array.prototype.fill; }
Specifications
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
|
14
|
37
|
No
|
36
|
9.1
|
No
|
45
|
37
|
No
|
9.3
|
5.0
|
1.0
|
4.0.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/fill
