Uint8ClampedArray

BaselineWidely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

TheUint8ClampedArray typed array represents an array of 8-bit unsigned integers clamped to 0–255. 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).

Uint8ClampedArray is a subclass of the hiddenTypedArray class.

Constructor

Uint8ClampedArray(): Creates a newUint8ClampedArray object.

Static properties

Also inherits static properties from its parentTypedArray.

Uint8ClampedArray.BYTES_PER_ELEMENT: Returns a number value of the element size.1 in the case ofUint8ClampedArray.

Static methods

Inherits static methods from its parentTypedArray.

Instance properties

Also inherits instance properties from its parentTypedArray.

These properties are defined onUint8ClampedArray.prototype and shared by allUint8ClampedArray instances.

Uint8ClampedArray.prototype.BYTES_PER_ELEMENT: Returns a number value of the element size.1 in the case of aUint8ClampedArray.
Uint8ClampedArray.prototype.constructor: The constructor function that created the instance object. ForUint8ClampedArray instances, the initial value is theUint8ClampedArray constructor.

// From a lengthconst uint8c = new Uint8ClampedArray(2);uint8c[0] = 42;uint8c[1] = 1337;console.log(uint8c[0]); // 42console.log(uint8c[1]); // 255 (clamped)console.log(uint8c.length); // 2console.log(uint8c.BYTES_PER_ELEMENT); // 1// From an arrayconst x = new Uint8ClampedArray([21, 31]);console.log(x[1]); // 31// From another TypedArrayconst y = new Uint8ClampedArray(x);console.log(y[0]); // 21// From an ArrayBufferconst buffer = new ArrayBuffer(8);const z = new Uint8ClampedArray(buffer, 1, 4);console.log(z.byteOffset); // 1// From an iterableconst iterable = (function* () {  yield* [1, 2, 3];})();const uint8cFromIterable = new Uint8ClampedArray(iterable);console.log(uint8cFromIterable);// Uint8ClampedArray [1, 2, 3]