Uint16Array
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 typed array represents an array of 16-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).
Uint16Array is a subclass of the hidden TypedArray class.
Constructor
Uint16Array()-
Creates a new
Uint16Arrayobject.
Static properties
Also inherits static properties from its parent TypedArray.
Uint16Array.BYTES_PER_ELEMENT-
Returns a number value of the element size.
2in the case ofUint16Array.
Static methods
Inherits static methods from its parent TypedArray.
Instance properties
Also inherits instance properties from its parent TypedArray.
These properties are defined on Uint16Array.prototype and shared by all Uint16Array instances.
Uint16Array.prototype.BYTES_PER_ELEMENT-
Returns a number value of the element size.
2in the case of aUint16Array. Uint16Array.prototype.constructor-
The constructor function that created the instance object. For
Uint16Arrayinstances, the initial value is theUint16Arrayconstructor.
Instance methods
Inherits instance methods from its parent TypedArray.
Examples
Different ways to create a Uint16Array
// 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® 2026 Language Specification # table-49 |