Int32Array()-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 Int32Array()-Konstruktor erstellt Int32Array-Objekte. Der Inhalt wird auf 0 initialisiert, es sei denn, es werden explizit Initialisierungsdaten bereitgestellt.
Syntax
js
new Int32Array()
new Int32Array(length)
new Int32Array(typedArray)
new Int32Array(object)
new Int32Array(buffer)
new Int32Array(buffer, byteOffset)
new Int32Array(buffer, byteOffset, length)
Parameter
Siehe TypedArray.
Ausnahmen
Siehe TypedArray.
Beispiele
Verschiedene Möglichkeiten, ein Int32Array zu erstellen
js
// From a length
const int32 = new Int32Array(2);
int32[0] = 42;
console.log(int32[0]); // 42
console.log(int32.length); // 2
console.log(int32.BYTES_PER_ELEMENT); // 4
// From an array
const x = new Int32Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Int32Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Int32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const int32FromIterable = new Int32Array(iterable);
console.log(int32FromIterable);
// Int32Array [1, 2, 3]
Spezifikationen
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-constructors |