Uint32Array - JavaScript | MDN (original) (raw)
Constructor
Creates a new Uint32Array object.
Static properties
Also inherits static properties from its parent TypedArray.
Returns a number value of the element size. 4 in the case of Uint32Array.
Static methods
Inherits static methods from its parent TypedArray.
Instance properties
Also inherits instance properties from its parent TypedArray.
These properties are defined on Uint32Array.prototype and shared by all Uint32Array instances.
Uint32Array.prototype.BYTES_PER_ELEMENT
Returns a number value of the element size. 4 in the case of a Uint32Array.
Uint32Array.prototype.constructor
The constructor function that created the instance object. For Uint32Array instances, the initial value is the Uint32Array constructor.
Instance methods
Inherits instance methods from its parent TypedArray.
Examples
Different ways to create a Uint32Array
// From a length
const uint32 = new Uint32Array(2);
uint32[0] = 42;
console.log(uint32[0]); // 42
console.log(uint32.length); // 2
console.log(uint32.BYTES_PER_ELEMENT); // 4
// From an array
const x = new Uint32Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Uint32Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Uint32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const uint32FromIterable = new Uint32Array(iterable);
console.log(uint32FromIterable);
// Uint32Array [1, 2, 3]
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-objects |