Range.getBoundingClientRect()

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.

实验性: 这是一项实验性技术
在将其用于生产之前,请仔细检查浏览器兼容性表格

Range.getBoundingClientRect() 返回一个 DOMRect 对象,该对象将范围中的内容包围起来;即该对象是一个将范围内所有元素的边界矩形包围起来的矩形(译者注:关于边界矩形,可以参考 Minimum Bouding Rectangles)。

此方法可用于确定文本区域中选中的部分或光标的视窗坐标。关于返回值的详细信息,参见 Element.getBoundingClientRect()

语法

boundingRect = range.getBoundingClientRect()

示例

HTML

html
<div id="highlight"></div>
<p>
  This example positions a "highlight" rectangle behind the contents of a range.
  The range's content <b>starts here</b> and continues on until it
  <b>ends here</b>. The bounding client rectangle contains everything selected
  in the range.
</p>

CSS

css
#highlight {
  background: yellow;
  position: absolute;
  z-index: -1;
}

p {
  width: 200px;
}

JavaScript

js
const range = document.createRange();
range.setStartBefore(document.getElementsByTagName("b").item(0), 0);
range.setEndAfter(document.getElementsByTagName("b").item(1), 0);

const clientRect = range.getBoundingClientRect();
const highlight = document.getElementById("highlight");
highlight.style.left = `${clientRect.x}px`;
highlight.style.top = `${clientRect.y}px`;
highlight.style.width = `${clientRect.width}px`;
highlight.style.height = `${clientRect.height}px`;

结果

规范

Specification
CSSOM View Module
# dom-range-getboundingclientrect

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
getBoundingClientRect

Legend

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

Full support
Full support

参见