BigInt64Array
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
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
unless initialization data is explicitly provided. 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.
Try it
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 ofBigInt64Array
.
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 aBigInt64Array
. BigInt64Array.prototype.constructor
-
The constructor function that created the instance object. For
BigInt64Array
instances, the initial value is theBigInt64Array
constructor.
Instance methods
Inherits instance methods from its parent 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-objects |
Browser compatibility
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