setFloat32()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

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.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Typed Array Specification Obsolete Superseded by ECMAScript 6.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 Latest Draft (ECMA-262)
DataView.prototype.setFloat32
Draft  

浏览器支持

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support912151012.15.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4 Yes Yes15124.2 Yes

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