Uint8ClampedArray()-Konstruktor
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since Juli 2015.
Der Uint8ClampedArray()-Konstruktor erstellt Uint8ClampedArray-Objekte. Der Inhalt wird auf 0 initialisiert, es sei denn, es werden explizit Initialisierungsdaten bereitgestellt.
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)
Parameter
Siehe TypedArray.
Ausnahmen
Siehe TypedArray.
Beispiele
Verschiedene Möglichkeiten, ein Uint8ClampedArray zu erstellen
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]
Spezifikationen
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-constructors |