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
js
new BigInt64Array()
new BigInt64Array(length)
new BigInt64Array(typedArray)
new BigInt64Array(object)
new BigInt64Array(buffer)
new BigInt64Array(buffer, byteOffset)
new BigInt64Array(buffer, byteOffset, length)
Parameters
See TypedArray
.
Exceptions
See TypedArray
.
Examples
Different ways to create a BigInt64Array
js
// 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® 2025 Language Specification # sec-typedarray-constructors |
Browser compatibility
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