BigInt64Array() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

The BigInt64Array() constructor creates BigInt64Array objects. The contents are initialized to 0n unless initialization data is explicitly provided.

Syntax

new BigInt64Array()
new BigInt64Array(length)
new BigInt64Array(typedArray)
new BigInt64Array(object)

new BigInt64Array(buffer)
new BigInt64Array(buffer, byteOffset)
new BigInt64Array(buffer, byteOffset, length)

Note: BigInt64Array() can only be constructed with new. Attempting to call it without new throws a TypeError.

Parameters

See TypedArray.

Exceptions

See TypedArray.

Examples

Different ways to create a BigInt64Array

// From a length
const bigint64 = new BigInt64Array(2);
bigint64[0] = 42n;
console.log(bigint64[0]); // 42n
console.log(bigint64.length); // 2
console.log(bigint64.BYTES_PER_ELEMENT); // 8

// From an array
const x = new BigInt64Array([21n, 31n]);
console.log(x[1]); // 31n

// From another TypedArray
const y = new BigInt64Array(x);
console.log(y[0]); // 21n

// From an ArrayBuffer
const buffer = new ArrayBuffer(64);
const z = new BigInt64Array(buffer, 8, 4);
console.log(z.byteOffset); // 8

// From an iterable
const iterable = (function* () {
  yield* [1n, 2n, 3n];
})();
const bigint64FromIterable = new BigInt64Array(iterable);
console.log(bigint64FromIterable);
// BigInt64Array [1n, 2n, 3n]

Specifications

Specification
ECMAScript Language Specification # sec-typedarray-constructors

Browser compatibility

	Desktop					Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`BigInt64Array`	67	79	68	54	15	67	68	48	15	9.0	67	1.0	10.4.0