如何在contenteditable元素（div）中设置插入符号（光标）？

问题描述

我将这个简单的HTML作为示例：

I have this simple HTML as an example:

<div id="editable" contenteditable="true">
  text text text<br>
  text text text<br>
  text text text<br>
</div>
<button id="button">focus</button>

我想要简单的事情 - 当我点击按钮时，我想把插入符号（光标）放到特定的位置放在可编辑的div中。通过网络搜索，我将这个JS附加到按钮点击，但它不起作用（FF，Chrome）：

I want simple thing - when I click the button, I want to place caret(cursor) into specific place in the editable div. From searching over the web, I have this JS attached to button click, but it doesn't work (FF, Chrome):

var range = document.createRange();
var myDiv = document.getElementById("editable");
range.setStart(myDiv, 5);
range.setEnd(myDiv, 5);

是否可以设置这样的手动插入位置？

Is it possible to set manually caret position like this ?

推荐答案

在大多数浏览器中，您需要和对象。您将每个选择边界指定为节点和该节点内的偏移量。例如，要将插入符号设置为第二行文本的第五个字符，您需要执行以下操作：

In most browsers, you need the Range and Selection objects. You specify each of the selection boundaries as a node and an offset within that node. For example, to set the caret to the fifth character of the second line of text, you'd do the following:

var el = document.getElementById("editable");
var range = document.createRange();
var sel = window.getSelection();
range.setStart(el.childNodes[2], 5);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);

IE< 9完全不同。如果你需要支持这些浏览器，你需要不同的代码。

IE < 9 works completely differently. If you need to support these browsers, you'll need different code.

jsFiddle示例：

jsFiddle example: http://jsfiddle.net/timdown/vXnCM/

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