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Int32Array() constructor

The Int32Array() constructor creates Int32Array objects. The contents are initialized to 0.

Syntax

js
new Int32Array()
new Int32Array(length)
new Int32Array(typedArray)
new Int32Array(object)

new Int32Array(buffer)
new Int32Array(buffer, byteOffset)
new Int32Array(buffer, byteOffset, length)

Note: Int32Array() can only be constructed with new. Attempting to call it without new throws a TypeError.

Parameters

Exceptions

Examples

Different ways to create an Int32Array

js
// From a length
const int32 = new Int32Array(2);
int32[0] = 42;
console.log(int32[0]); // 42
console.log(int32.length); // 2
console.log(int32.BYTES_PER_ELEMENT); // 4

// From an array
const x = new Int32Array([21, 31]);
console.log(x[1]); // 31

// From another TypedArray
const y = new Int32Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Int32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4

// From an iterable
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const int32FromIterable = new Int32Array(iterable);
console.log(int32FromIterable);
// Int32Array [1, 2, 3]

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
Int32Array 7 12 4 11.6 5.1 18 4 12 4.2 1.0 4 1.0 0.10.0
constructor_without_parameters 7 12 55 11.6 5.1 18 55 12 5 1.0 ≤37 1.0 0.10.0
iterable_allowed 39 14 52 26 10 39 52 26 10 4.0 39 1.0 4.0.0
new_required 7 14 44 15 5.1 18 44 14 5 1.0 ≤37 1.0 0.12.0

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/Int32Array/Int32Array