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ArrayBuffer.prototype.resize() - JavaScript | MDN
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ArrayBuffer.prototype.resize()

Baseline 2024
Newly available

Since 2024 7, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

ArrayBuffer resize() ArrayBuffer .

In this article

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

console.log(buffer.byteLength);
// Expected output: 8

buffer.resize(12);

console.log(buffer.byteLength);
// Expected output: 12

js
resize(newLength)

newLength

ArrayBuffer .

(undefined).

TypeError

ArrayBuffer .

RangeError

ArrayBuffer maxByteLength newLength .

resize() ArrayBuffer resizable ArrayBuffer maxByteLength newLength ArrayBuffer . 0 .

resize() ArrayBuffer . newLength ArrayBuffer byteLength .

resize()

16 8 resizable resizable true .

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

if (buffer.resizable) {
  console.log("Buffer is resizable!");
  buffer.resize(12);
}

Specification
ECMAScript 2027 LanguageSpecification
# sec-arraybuffer.prototype.resize

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  2. ArrayBuffer
    1. ArrayBuffer()
    1. ArrayBuffer.isView()
    1. ArrayBuffer[Symbol.species]
    1. ArrayBuffer.prototype.resize()
    2. ArrayBuffer.prototype.slice()
    3. ArrayBuffer.prototype.transfer()
    4. ArrayBuffer.prototype.transferToFixedLength()
    1. ArrayBuffer.prototype.byteLength
    2. ArrayBuffer.prototype.detached
    3. ArrayBuffer.prototype.maxByteLength
    4. ArrayBuffer.prototype.resizable
  9. Object/Function
    1. Function.prototype.apply()
    2. Function.prototype.bind()
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    5. Function.prototype[@@hasInstance]()
    1. Function: displayName
    2. Function.prototype.length
    3. Function: name
    4. Function
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    1. Object.prototype.__defineGetter__()
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    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
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    8. Object.prototype.toLocaleString()
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    1. Object.prototype.__proto__
    2. Object.prototype.constructor
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