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Uint16Array

BaselineWidely available

TheUint16Array typed array represents an array of 16-bit unsigned 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).

Uint16Array is a subclass of the hiddenTypedArray class.

Constructor

Uint16Array()

Creates a newUint16Array object.

Static properties

Also inherits static properties from its parentTypedArray.

Uint16Array.BYTES_PER_ELEMENT

Returns a number value of the element size.2 in the case ofUint16Array.

Static methods

Inherits static methods from its parentTypedArray.

Instance properties

Also inherits instance properties from its parentTypedArray.

These properties are defined onUint16Array.prototype and shared by allUint16Array instances.

Uint16Array.prototype.BYTES_PER_ELEMENT

Returns a number value of the element size.2 in the case of aUint16Array.

Uint16Array.prototype.constructor

The constructor function that created the instance object. ForUint16Array instances, the initial value is theUint16Array constructor.

Instance methods

Inherits instance methods from its parentTypedArray.

Examples

Different ways to create a Uint16Array

js
// From a lengthconst uint16 = new Uint16Array(2);uint16[0] = 42;console.log(uint16[0]); // 42console.log(uint16.length); // 2console.log(uint16.BYTES_PER_ELEMENT); // 2// From an arrayconst x = new Uint16Array([21, 31]);console.log(x[1]); // 31// From another TypedArrayconst y = new Uint16Array(x);console.log(y[0]); // 21// From an ArrayBufferconst buffer = new ArrayBuffer(16);const z = new Uint16Array(buffer, 2, 4);console.log(z.byteOffset); // 2// From an iterableconst iterable = (function* () {  yield* [1, 2, 3];})();const uint16FromIterable = new Uint16Array(iterable);console.log(uint16FromIterable);// Uint16Array [1, 2, 3]

Specifications

Specification
ECMAScript® 2026 Language Specification
# sec-typedarray-objects

Browser compatibility

See also

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