Int32Array

// Construction  partir d'une longueur
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

// Construction  partir d'un tableau
const x = new Int32Array([21, 31]);
console.log(x[1]); // 31

// Construction  partir d'un autre TypedArray
const y = new Int32Array(x);
console.log(y[0]); // 21

// Construction  partir d'un ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Int32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4

// Construction  partir d'un itrable
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const int32FromIterable = new Int32Array(iterable);
console.log(int32FromIterable);
// Int32Array [1, 2, 3]