获取鼠标指针下的文本 [英] Getting the text under the mouse pointer

问题描述

我正在编写一个浏览器插件，想要通过Javascript获取用户当前悬停的单词/单词。

I'm writing a browser add-on and want to get the word / words the user is currently hovering over via Javascript.

推荐答案

一种选择是将每个单词放在自己的< span> 元素中，并添加 mouseover 处理程序到检查事件的目标 / srcElement 属性的主体，以检索范围，从而检索单词。这有很大的缺点：用跨度围绕每个单词的初始过程可能很慢;新的跨度可能会破坏现有的CSS规则;该文档最终将包含大量没有语义价值的元素。

One option is to place every word inside its own <span> element and adding a mouseover handler to the body that checks the event's target / srcElement property to retrieve the span and therefore the word. This has significant downsides: the initial process of surrounding each word with a span could be slow; the new spans could mess up existing CSS rules; the document would end up with loads of elements that have no semantic value.

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