DataView.prototype.setFloat64()

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).

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

Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 6.
ECMAScript 2015 (6th Edition, ECMA-262)
DataView.prototype.setFloat64		 Standard Initial definition in an ECMA standard.
ECMAScript (ECMA-262)
DataView.prototype.setFloat64		 Living Standard  

浏览器支持

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
setFloat64Chrome Full support 9Edge Full support 12Firefox Full support 15IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support 4Chrome Android Full support 18Firefox Android Full support 15Opera Android Full support 12.1Safari iOS Full support 4.2Samsung Internet Android Full support 1.0nodejs Full support 0.10

Legend

Full support  
Full support

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    2. DataView.prototype.byteLength
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    2. DataView.prototype.getBigUint64()
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    4. DataView.prototype.getFloat64()
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    12. DataView.prototype.setBigUint64()
    13. DataView.prototype.setFloat32()
    14. DataView.prototype.setFloat64()
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    16. DataView.prototype.setInt32()
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