Uint32Array() constructor
The Uint32Array() constructor creates Uint32Array objects. The contents are initialized to 0.
Syntax
js
new Uint32Array()
new Uint32Array(length)
new Uint32Array(typedArray)
new Uint32Array(object)
new Uint32Array(buffer)
new Uint32Array(buffer, byteOffset)
new Uint32Array(buffer, byteOffset, length)
Parameters
See TypedArray.
Exceptions
See TypedArray.
Examples
Different ways to create a Uint32Array
js
// 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 Language Specification # sec-typedarray-constructors |
Browser compatibility
| desktop | mobile | server | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uint32Array() constructor | |||||||||||||
Constructor without parameters | |||||||||||||
new Uint32Array(iterable) | |||||||||||||