OffscreenCanvas()

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这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

OffscreenCanvas()构造函数,返回一个新的OffscreenCanvas对象

语法

new OffscreenCanvas(width, height);

参数

width
离屏canvas 的高度
height
离屏canvas 的宽度

示例

创建一个离屏Canvas并且初始一个 WebGL 上下文:

var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext("webgl");

规范

Specification Status Comment
HTML Living Standard
OffscreenCanvas()
Living Standard  

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Experimental
Chrome Full support 69Edge ? Firefox Full support 46
Disabled
Full support 46
Disabled
Disabled From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 56Safari No support NoWebView Android No support NoChrome Android Full support 69Edge Mobile ? Firefox Android Full support 46
Disabled
Full support 46
Disabled
Disabled From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.
Opera Android Full support YesSafari iOS No support NoSamsung Internet Android Full support 4.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.
User must explicitly enable this feature.

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