Uint16Array
BaselineWidely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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 new
Uint16Array
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. For
Uint16Array
instances, the initial value is theUint16Array
constructor.
Instance methods
Inherits instance methods from its parentTypedArray
.
Examples
Different ways to create a Uint16Array
// 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 |