Int32Array
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
TheInt32Array typed array represents an array of 32-bit signed integers in the platform byte order. If control over byte order is needed, useDataView instead. The contents are initialized to0 unless initialization data is explicitly provided. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
Int32Array is a subclass of the hiddenTypedArray class.
Constructor
Int32Array()Creates a new
Int32Arrayobject.
Static properties
Also inherits static properties from its parentTypedArray.
Int32Array.BYTES_PER_ELEMENTReturns a number value of the element size.
4in the case ofInt32Array.
Static methods
Inherits static methods from its parentTypedArray.
Instance properties
Also inherits instance properties from its parentTypedArray.
These properties are defined onInt32Array.prototype and shared by allInt32Array instances.
Int32Array.prototype.BYTES_PER_ELEMENTReturns a number value of the element size.
4in the case of anInt32Array.Int32Array.prototype.constructorThe constructor function that created the instance object. For
Int32Arrayinstances, the initial value is theInt32Arrayconstructor.
Instance methods
Inherits instance methods from its parentTypedArray.
Examples
Different ways to create an Int32Array
// From a lengthconst int32 = new Int32Array(2);int32[0] = 42;console.log(int32[0]); // 42console.log(int32.length); // 2console.log(int32.BYTES_PER_ELEMENT); // 4// From an arrayconst x = new Int32Array([21, 31]);console.log(x[1]); // 31// From another TypedArrayconst y = new Int32Array(x);console.log(y[0]); // 21// From an ArrayBufferconst buffer = new ArrayBuffer(32);const z = new Int32Array(buffer, 4, 4);console.log(z.byteOffset); // 4// From an iterableconst iterable = (function* () { yield* [1, 2, 3];})();const int32FromIterable = new Int32Array(iterable);console.log(int32FromIterable);// Int32Array [1, 2, 3]Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-objects |