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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 shared array is constructed, set via the maxByteLength option of the SharedArrayBuffer() constructor, and cannot be changed.

If this SharedArrayBuffer was constructed without specifying a maxByteLength value, this property returns a value equal to the value of the SharedArrayBuffer's byteLength.

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

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

buffer.maxByteLength; // 16

• SharedArrayBuffer