Range.collapse()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2017.

Range.collapse() 方法向边界点折叠该 Range

折叠后的 Range 为空,不包含任何内容。

要确定 Range 是否已折叠,使用Range.collapsed 属性。

语法

js
collapse()
collapse(toStart)

参数

toStart 可选

一个布尔值: true 折叠到 Range 的 start 节点,false 折叠到 end 节点。如果省略,则默认为 false 实验性 .

示例

js
var range = document.createRange();

referenceNode = document.getElementsByTagName("div").item(0);
range.selectNode(referenceNode);
range.collapse(true);

规范

Specification
DOM
# dom-range-collapse

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
collapse
toStart parameter is optional

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参阅