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BigInt64Array

The BigInt64Array typed array represents an array of 64-bit signed integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0n. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

BigInt64Array is a subclass of the hidden TypedArray class.

Constructor

BigInt64Array()

Creates a new BigInt64Array object.

Static properties

Also inherits static properties from its parent TypedArray.

BigInt64Array.BYTES_PER_ELEMENT

Returns a number value of the element size. 8 in the case of BigInt64Array.

Static methods

Inherits static methods from its parent TypedArray.

Instance properties

Also inherits instance properties from its parent TypedArray.

These properties are defined on BigInt64Array.prototype and shared by all BigInt64Array instances.

BigInt64Array.prototype.BYTES_PER_ELEMENT

Returns a number value of the element size. 8 in the case of a BigInt64Array.

BigInt64Array.prototype.constructor

The constructor function that created the instance object. For BigInt64Array instances, the initial value is the BigInt64Array constructor.

Instance methods

Inherits instance methods from its parent 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

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
BigInt64Array 67 79 68 54 15 67 68 48 15 9.0 67 1.0 10.4.0

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array