javascript constructor
BigInt64Array() constructor
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 withnew. Attempting to call it withoutnewthrows aTypeError.
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
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.