Selection.collapse()

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。

 Selection.collapse() 方法可以收起当前选区到一个点。文档不会发生改变。如果选区的内容是可编辑的并且焦点落在上面,则光标会在该处闪烁。

语法

sel.collapse(parentNode, offset);

参数

parentNode
光标落在的目标节点。
offset 可选
落在节点的偏移量。

例子

/* 将光标收起到文档body的开头 */
var body = document.getElementsByTagName("body")[0];
window.getSelection().collapse(body,0);

规范

规范 状态 备注
Selection API
Selection.collapse()
Working Draft  
HTML Editing APIs
Selection.collapse()
Editor's Draft Initial definition

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
collapse
Experimental
Chrome Full support YesEdge Full support 12Firefox Full support YesIE Full support 9Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
 

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