JS dataview getBigUint64()

getBigUint64()方法，从DataView的指定偏移量位置获取一个无符号64位整数(unsigned long long)。

上述交互例程存储在github仓库中. 如果你想贡献这段交互代码， 请克隆https://github.com/mdn/interactive-examples ，然后给我们提交一个pull request.

语法

dataview.getBigUint64(byteOffset [, littleEndian])

参数

byteOffset

偏移量，按字节偏移，从DataView读取一个整数

littleEndian

可选 指出64位整数以 little- or big-endian 类型存储. 如果值为 false or undefined, 读取一个大端数值.

返回值

A BigInt.

异常

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

See also

• DataView
• ArrayBuffer
• BigInt