Baseline Widely available
The Uint32Array
typed array represents an array of 32-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView
instead. The contents are initialized to 0
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).
Uint32Array
is a subclass of the hidden TypedArray
class.
Uint32Array()
Creates a new Uint32Array
object.
Also inherits static properties from its parent TypedArray
.
Uint32Array.BYTES_PER_ELEMENT
Returns a number value of the element size. 4
in the case of Uint32Array
.
Inherits static methods from its parent TypedArray
.
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.
Inherits instance methods from its parent TypedArray
.
// 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]
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