问题描述
我正在尝试用 Javascript 开发一些代码，将突出显示的文本添加到类中.我想要实现的是使用自定义颜色突出显示文本的能力.
I'm trying to develop some code in Javascript that adds highlighted text to a class. What I want to achieve with this is the ability of text highlighting with a custom color.
我希望它看起来像下面这样:
I want it to kind of look like the following:
window.getSelected = "<span class=\"highlighted\">" + window.getSelected + "</span>"
执行上述代码后，所选文本的背景被span标签包围.
after the above code is executed the selected text's background is surrounded by span tags.
谢谢，
fbr
推荐答案
你会想要研究范围对象，这里有一个很好的总结:
You'll want to look into Range Objects, there is a good summary here:
http://www.quirksmode.org/dom/range_intro.html
浏览器兼容性会是个问题，但基本上，你可以按照你建议的方式获取当前选择，然后将其转换为一个Range，并使用Range对象的方法来查找和拆分现有的DOM节点，并且插入包含所选文本的您自己的 标签.
Browser compatibility will be an issue, but basically, you can get the current selection in the way you suggest, then convert it into a Range, and use the methods of the Range object to find and split the existing DOM nodes, and insert your own <span> tag containing the selected text.
这并不完全是微不足道的，并且涉及到认真的 DOM 操作，但它是一个有益的主题，让您了解一下.享受！
It's not entirely trivial, and involves getting into serious DOM manipulation, but it's a rewarding subject to get your head around. Enjoy!
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