The BigUint64Array()
typed array constructor creates a new BigUint64Array
object, which is, an array of 64-bit unsigned 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 by using standard array index syntax (that is, using bracket notation).
Syntax
new BigUint64Array(); new BigUint64Array(length); new BigUint64Array(typedArray); new BigUint64Array(object); new BigUint64Array(buffer [, byteOffset [, length]]);
Parameters
length
- When called with a
length
argument, an internal array buffer is created in memory, of sizelength
multiplied byBYTES_PER_ELEMENT
bytes, containing zeros. typedArray
- When called with a
typedArray
argument, which can be an object of any of the typed array types (such asInt32Array
), thetypedArray
gets copied into a new typed array. Each value intypedArray
is converted to the corresponding type of the constructor before being copied into the new array. The length of the new typed array will be same as the length of thetypedArray
argument. object
- When called with an
object
argument, a new typed array is created as if by theTypedArray.from()
method. buffer
,byteOffset
,length
- When called with a
buffer
, and optionally abyteOffset
and alength
argument, a new typed array view is created that views the specifiedArrayBuffer
. ThebyteOffset
andlength
parameters specify the memory range that will be exposed by the typed array view. If both are omitted, all ofbuffer
is viewed; if onlylength
is omitted, the remainder ofbuffer
is viewed.
Examples
Different ways to create a BigUint64Array
// From a length var biguint64 = new BigUint64Array(2); biguint64[0] = 42n; console.log(biguint64[0]); // 42n console.log(biguint64.length); // 2 console.log(biguint64.BYTES_PER_ELEMENT); // 8 // From an array var arr = new BigUint64Array([21n,31n]); console.log(arr[1]); // 31n // From another TypedArray var x = new BigUint64Array([21n, 31n]); var y = new BigUint64Array(x); console.log(y[0]); // 21n // From an ArrayBuffer var buffer = new ArrayBuffer(32); var z = new BigUint64Array(buffer, 0, 4); // From an iterable var iterable = function*(){ yield* [1n, 2n, 3n]; }(); var biguint64 = new BigUint64Array(iterable); // BigUint64Array[1n, 2n, 3n]
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'BigUint64Array' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BigUint64Array() constructor | Chrome Full support 67 | Edge Full support 79 | Firefox Full support 68 | IE No support No | Opera Full support 54 | Safari No support No | WebView Android Full support 67 | Chrome Android Full support 67 | Firefox Android Full support 68 | Opera Android Full support 48 | Safari iOS No support No | Samsung Internet Android Full support 9.0 | nodejs Full support 10.4.0 |
Legend
- Full support
- Full support
- No support
- No support