Int8Array()-Konstruktor
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.
Der Int8Array()-Konstruktor erstellt Int8Array-Objekte. Der Inhalt wird auf 0 initialisiert, es sei denn, es werden explizit Initialisierungsdaten bereitgestellt.
Syntax
js
new Int8Array()
new Int8Array(length)
new Int8Array(typedArray)
new Int8Array(object)
new Int8Array(buffer)
new Int8Array(buffer, byteOffset)
new Int8Array(buffer, byteOffset, length)
Parameter
Siehe TypedArray.
Ausnahmen
Siehe TypedArray.
Beispiele
Verschiedene Möglichkeiten, ein Int8Array zu erstellen
js
// From a length
const int8 = new Int8Array(2);
int8[0] = 42;
console.log(int8[0]); // 42
console.log(int8.length); // 2
console.log(int8.BYTES_PER_ELEMENT); // 1
// From an array
const x = new Int8Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Int8Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(8);
const z = new Int8Array(buffer, 1, 4);
console.log(z.byteOffset); // 1
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const int8FromIterable = new Int8Array(iterable);
console.log(int8FromIterable);
// Int8Array [1, 2, 3]
Spezifikationen
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-constructors |