如何用元素包装/环绕突出显示的文本 [英] How To Wrap / Surround Highlighted Text With An Element
问题描述
我想将选定的文本用span包裹在div容器中,可以吗?
I want to wrap a selected text in a div container with span, is it possible?
用户将选择一个文本并单击一个按钮,在按钮上单击事件,我想用span元素包装所选的文本。我可以使用 window.getSelection()
获取所选文本,但是如何知道其在DOM结构中的确切位置?
A user will select a text and will click a button, on button click event I want to wrap that selected text with span element. I can get the selected text using window.getSelection()
but how to know its exact position in DOM structure?
推荐答案
如果所选内容完全包含在单个文本节点中,则可以使用您从选择中获得的范围的 surroundContents()
方法。但是,这非常脆弱:如果选择不能在逻辑上包围在单个元素中(通常,如果范围跨越节点边界,则该选择不起作用,尽管这不是精确定义)。要在一般情况下执行此操作,您需要一种更复杂的方法。
If the selection is completely contained within a single text node, you can do this using the surroundContents()
method of the range you obtain from the selection. However, this is very brittle: it does not work if the selection cannot logically be surrounded in a single element (generally, if the range crosses node boundaries, although this is not the precise definition). To do this in the general case, you need a more complicated approach.
此外,DOM Range
和<$ IE< c中不支持c $ c> window.getSelection()。 9.对于这些浏览器,您将再次需要另一种方法。您可以使用我自己的 Rangy 之类的库来规范浏览器行为,并且您可能会发现课程应用模块对此问题很有用。
Also, DOM Range
and window.getSelection()
are not supported in IE < 9. You'll need another approach again for those browsers. You can use a library such as my own Rangy to normalize browser behaviour and you may find the class applier module useful for this question.
简单的 surroundContents()
示例jsFiddle: http:// jsfiddle.net/VRcvn/
Simple surroundContents()
example jsFiddle: http://jsfiddle.net/VRcvn/
代码:
function surroundSelection(element) {
if (window.getSelection) {
var sel = window.getSelection();
if (sel.rangeCount) {
var range = sel.getRangeAt(0).cloneRange();
range.surroundContents(element);
sel.removeAllRanges();
sel.addRange(range);
}
}
}
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