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SharedArrayBuffer.prototype.grow()

The grow() method of SharedArrayBuffer instances grows the SharedArrayBuffer to the specified size, in bytes.

Syntax

js
grow(newLength)

Parameters

newLength

The new length, in bytes, to resize the SharedArrayBuffer to.

Return value

None (undefined).

Exceptions

TypeError

Thrown if the SharedArrayBuffer is not growable.

RangeError

Thrown if newLength is larger than the maxByteLength of the SharedArrayBuffer or smaller than the byteLength.

Description

The grow() method grows a SharedArrayBuffer to the size specified by the newLength parameter, provided that the SharedArrayBuffer is growable and the new size is less than or equal to the maxByteLength of the SharedArrayBuffer. New bytes are initialized to 0.

Examples

Using grow()

In this example, we create a 8-byte buffer that is growable to a max length of 16 bytes, then check its growable property, growing it if growable returns true:

js
const buffer = new SharedArrayBuffer(8, { maxByteLength: 16 });

if (buffer.growable) {
  console.log("SAB is growable!");
  buffer.grow(12);
}

Specifications

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android Deno Node.js
grow 111 111 No 97 16.4 111 No 75 16.4 22.0 No 1.33 20.0.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow