W3cubDocs

/JavaScript

Uint8ClampedArray() constructor

The Uint8ClampedArray() constructor creates Uint8ClampedArray objects. The contents are initialized to 0.

Syntax

js
new Uint8ClampedArray()
new Uint8ClampedArray(length)
new Uint8ClampedArray(typedArray)
new Uint8ClampedArray(object)

new Uint8ClampedArray(buffer)
new Uint8ClampedArray(buffer, byteOffset)
new Uint8ClampedArray(buffer, byteOffset, length)

Note: Uint8ClampedArray() can only be constructed with new. Attempting to call it without new throws a TypeError.

Parameters

Exceptions

Examples

Different ways to create a Uint8ClampedArray

js
// From a length
const uint8c = new Uint8ClampedArray(2);
uint8c[0] = 42;
uint8c[1] = 1337;
console.log(uint8c[0]); // 42
console.log(uint8c[1]); // 255 (clamped)
console.log(uint8c.length); // 2
console.log(uint8c.BYTES_PER_ELEMENT); // 1

// From an array
const x = new Uint8ClampedArray([21, 31]);
console.log(x[1]); // 31

// From another TypedArray
const y = new Uint8ClampedArray(x);
console.log(y[0]); // 21

// From an ArrayBuffer
const buffer = new ArrayBuffer(8);
const z = new Uint8ClampedArray(buffer, 1, 4);
console.log(z.byteOffset); // 1

// From an iterable
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const uint8cFromIterable = new Uint8ClampedArray(iterable);
console.log(uint8cFromIterable);
// Uint8ClampedArray [1, 2, 3]

Specifications

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android Deno Node.js
Uint8ClampedArray 7 12 4 11.6 5.1 18 4 12 4.2 1.0 4 1.0 0.10.0
constructor_without_parameters 7 12 55 11.6 5.1 18 55 12 5 1.0 ≤37 1.0 0.10.0
iterable_allowed 39 14 52 26 10 39 52 26 10 4.0 39 1.0 4.0.0
new_required 7 14 44 15 5.1 18 44 14 5 1.0 ≤37 1.0 0.12.0

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray/Uint8ClampedArray