setFloat32()
从
DataView
起始位置以byte为计数的指定偏移量(byteOffset)处储存一个32-bit数(浮点型).
语法
dataview.setFloat32(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 32-bit float is stored in little- or big-endian format. If false or undefined, a big-endian value is written.
返回
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.setFloat32(1, 3); dataview.getFloat32(1); // 3
规范
Specification | Status | Comment |
---|---|---|
Typed Array Specification | Obsolete | Superseded by ECMAScript 6. |
ECMAScript 2015 (6th Edition, ECMA-262) DataView.prototype.setFloat32 |
Standard | Initial definition in an ECMA standard. |
ECMAScript 2017 Draft (ECMA-262) DataView.prototype.setFloat32 |
Draft |
浏览器支持
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 9.0 | 15.0 (15.0) | 10 | 12.1 | 5.1 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | 4.0 | (Yes) | 15.0 (15) | ? | 12.0 | 4.2 |