dataView.getFloat32
dataView.getFloat32
getFloat32()方法从DataView
起始位置以byte为计数的指定偏移量(byteOffset)处获取一个32-bit数(浮点型).
语法
dataview.getFloat32(byteOffset [, littleEndian])
参数
byteOffset偏移量, 单位为字节, 从头开始计算.littleEndian可选Indicates whether the 32-bit float is stored inlittle- or big-endianformat. If false or undefined, a big-endian value is read.
返回值
一个浮点型32位数.
抛出错误
RangeError
如果byteOffset超出了视图能储存的值,就会抛出错误.
描述
没有对齐约束; 多字节值可以从任何偏移量获取.
例子
使用该getFloat32方法
var buffer = new ArrayBuffer(8
var dataview = new DataView(buffer
dataview.getFloat32(1 // 0
规范
Specification | Status | Comment |
---|---|---|
Typed Array Specification | Obsolete | Superseded by ECMAScript 2015. |
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'DataView.prototype.getFloat32' in that specification. | Standard | Initial definition in an ECMA standard. |
ECMAScript Latest Draft (ECMA-262)The definition of 'DataView.prototype.getFloat32' in that specification. | Draft | |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 9.0 | (Yes) | 15.0 (15.0) | 10 | 12.1 | 5.1 |
Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | 4.0 | (Yes) | (Yes) | 15.0 (15) | ? | 12.0 | 4.2 |