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鼠標經過, 選中文字

var log get style head hover his charset java

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<div id="a">aaa</div>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script type="text/javascript">
     
      $(
"#a").hover(function(){ this.focus(); if(window.getSelection){ var range=document.createRange(); range.selectNodeContents(this); var selection = window.getSelection(); selection.removeAllRanges(); selection.addRange(range) }
else if(document.selection){ //for ie var range=document.body.createTextRange() range.moveToElementText(this) range.select(); } },function(){ if(window.getSelection){ var range=document.createRange(); range.selectNodeContents(
this); var selection = window.getSelection(); selection.removeAllRanges(); } else if(document.selection){ //for ie var range=document.body.createTextRange() range.moveToElementText(none) } }); </script> </body> </html>

鼠標經過, 選中文字