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ArrayBuffer.prototype.maxByteLength

The maxByteLength accessor property of ArrayBuffer instances returns the maximum length (in bytes) that this array buffer can be resized to.

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Description

The maxByteLength property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when the array is constructed, set via the maxByteLength option of the ArrayBuffer() constructor, and cannot be changed.

This property returns 0 if this ArrayBuffer has been detached. If this ArrayBuffer was constructed without specifying a maxByteLength value, this property returns a value equal to the value of the ArrayBuffer's byteLength.

Examples

Using maxByteLength

In this example, we create an 8-byte buffer that is resizable to a max length of 16 bytes, then return its maxByteLength:

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

buffer.maxByteLength; // 16

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
maxByteLength 111 111 No 97 16.4 111 No 75 16.4 22.0 111 1.33 20.0.0

See also

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/maxByteLength