DataView.prototype.getBigUint64()

The getBigUint64() method of DataView instances reads 8 bytes starting at the specified byte offset of this DataView and interprets them as a 64-bit unsigned integer.

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Syntax

js

getBigUint64(byteOffset)
getBigUint64(byteOffset, littleEndian)

Parameters

byteOffset

The offset, in bytes, from the start of the view to read the data from.

littleEndian Optional

Indicates whether the 64-bit int is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

Return value

A BigInt.

Errors thrown

RangeError

Thrown if the byteOffset is set such that it would read beyond the end of the view.

Description

There is no alignment constraint; multi-byte values may be fetched from any offset.

Examples

Using the getBigUint64 method

js

const buffer = new ArrayBuffer(8);
const dataview = new DataView(buffer);
dataview.getBigUint64(0); // 0n

Specifications

Specification
ECMAScript Language Specification
# sec-dataview.prototype.getbiguint64

Browser compatibility

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See also