setFloat64()从DataView起始位置以byte为计数的指定偏移量(byteOffset)处储存一个64-bit数(双精度浮点型).

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

语法

dataview.setFloat64(byteOffset, value [, littleEndian])

参数

byteOffset

偏移量,从头开始计算,单位为字节.

value

设置的数值.

littleEndian

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

返回

undefined.

抛出错误

RangeError

如果byteOffset超出了视图能储存的值,就会抛出错误.

例子

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.setFloat64(0, 3);
dataview.getFloat64(0); // 3

规范

浏览器支持

相关内容

• DataView
• ArrayBuffer