Uint16Array() constructor

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.

The Uint16Array() constructor creates Uint16Array objects. The contents are initialized to 0 unless initialization data is explicitly provided.

Syntax

js
new Uint16Array()
new Uint16Array(length)
new Uint16Array(typedArray)
new Uint16Array(object)

new Uint16Array(buffer)
new Uint16Array(buffer, byteOffset)
new Uint16Array(buffer, byteOffset, length)

Note: Uint16Array() can only be constructed with new. Attempting to call it without new throws a TypeError.

Parameters

See TypedArray.

Exceptions

See TypedArray.

Examples

Different ways to create a Uint16Array

js
// From a length
const uint16 = new Uint16Array(2);
uint16[0] = 42;
console.log(uint16[0]); // 42
console.log(uint16.length); // 2
console.log(uint16.BYTES_PER_ELEMENT); // 2

// From an array
const x = new Uint16Array([21, 31]);
console.log(x[1]); // 31

// From another TypedArray
const y = new Uint16Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
const buffer = new ArrayBuffer(16);
const z = new Uint16Array(buffer, 2, 4);
console.log(z.byteOffset); // 2

// From an iterable
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const uint16FromIterable = new Uint16Array(iterable);
console.log(uint16FromIterable);
// Uint16Array [1, 2, 3]

Specifications

Specification
ECMAScript Language Specification
# sec-typedarray-constructors

Browser compatibility

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See also