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Uint8ClampedArray - JavaScript | MDN

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Uint8ClampedArray

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since 2015 7.

Uint8ClampedArray (TypedArray) 0-255 8 . [0,255] 0 255 . . 0 . (, ) .

In this article

Uint8ClampedArray()

Uint8ClampedArray .

TypedArray .

Uint8ClampedArray.BYTES_PER_ELEMENT

. Uint8ClampedArray 1 .

Uint8ClampedArray.name

. Uint8ClampedArray "Uint8ClampedArray".

TypedArray .

TypedArray .

Uint8ClampedArray.prototype.BYTES_PER_ELEMENT

. Uint8ClampedArray 1.

TypedArray .

Uint8ClampedArray

js
//  
const uintc8 = new Uint8ClampedArray(2);
uintc8[0] = 42;
uintc8[1] = 1337;
console.log(uintc8[0]); // 42
console.log(uintc8[1]); // 255 (clamped)
console.log(uintc8.length); // 2
console.log(uintc8.BYTES_PER_ELEMENT); // 1

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

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

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

//  
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const uintc8FromIterable = new Uint8ClampedArray(iterable);
console.log(uintc8FromIterable);
// Uint8ClampedArray [1, 2, 3]

Specification
ECMAScript 2027 LanguageSpecification
# sec-typedarray-objects


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