更改innerHTML后，更改contenteditable div中的光标位置

问题描述

我有一个简单的contenteditable div，里面有一些文字。
在onkeyup事件中，我想根据正则表达式替换div的整个内容（innerHTML）。 例如，

HTML：

 一些文字，更多文字和$甚至更多文字
  

函数，我打算用$（$甚至在上面的例子中）获取所有文本并将其包装在span标记中：

  div.onkeypress = function（）{
 div.innerHTML.replace（/（some_regexp）/，< span class = '类' > $ 1·/跨度>中）; 
}; 
  

问题出在这样的替换光标跳转到div的开头。我希望它保持原来的位置。

我想我必须在更改之前保存光标的坐标，然后以某种方式使用它们来设置光标，但我该怎么办它？ ：）

我试过保存范围对象，但编辑后我认为它指向无处。

谢谢！ / p>

解决方案

问题是你正在更新整个innerHTML，但只有一小部分正在改变。您不能使用正则表达式和批量替换。您需要扫描div并查找匹配项，从中创建文本范围并用span覆盖内容。请参阅，以编程方式创建一个范围。

然而，如果光标位于要替换的文本中，我认为这将不起作用，这是一个开始。

I have a simple contenteditable div with some text in it.On onkeyup event i want to replace whole content (innerHTML) of the div based on regex.

For example,

HTML:

some text, more text and $even more text

Function in which i plan to get all text with $ ($even in example above) and wrap it in span tag:

div.onkeypress = function() {
     div.innerHTML.replace(/(some_regexp)/, "<span class='class'>$1</span>");
};

The problem is after such replacement cursor jumps to the start of the div. I want it to stay where it was before.

I imagine i have to save coordinates of the cursor before change and then somehow using them set cursor back but how can i do it? :)

I tried saving range object but after editing i believe it points to nowhere.

Thanks!

解决方案

The problem is that you're updating the whole innerHTML, but only a small part of it is changing. You can't use a regular expression and o a bulk replace. You need to scan the div and look for matches, create text ranges out of them and wrap the content with the span. See http://www.quirksmode.org/dom/range_intro.html , Programmatically creating a Range.

However, I think this won't work if the cursor is in the text to be replaced, it's a start though.

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