DataView.prototype.getBigUint64()

The getBigUint64() method gets an unsigned 64-bit integer (unsigned long long) at the specified byte offset from the start of the DataView.

Syntax

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

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

Specifications

Browser compatibility

See also

• DataView
• ArrayBuffer
• BigInt