DataView.prototype.getBigUint64() - JavaScript 编辑

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

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Syntax

dataview.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

BCD tables only load in the browser

See also

• DataView
• ArrayBuffer
• BigInt