<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div class="u_div"> <span>微信</span>
<div id="wxnum">123456</div>
<a href="javascript:void(0);" id="copyBtn">复制</a>
</div>
</body>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script type="text/javascript">
function copyArticle(event) {
const range = document.createRange();
range.selectNode(document.getElementById('wxnum'));
const selection = window.getSelection();
if(selection.rangeCount > 0) selection.removeAllRanges();
selection.addRange(range);
document.execCommand('copy');
alert("复制成功！");
}
document.getElementById('copyBtn').addEventListener('click', copyArticle, false);
</script>
</html>
