可以实现一键复制需要的字段。

HTML页面：

<!DOCTYPE html><html lang="en"><head>	<meta charset="UTF-8">	<meta name="viewport" content="width=device-width, initial-scale=1.0">	<title>Document</title>	<script src="../npm/jquery@3.6.0/dist/jquery.min.js"></script>	<script src="js/clipboard.js"></script>	<style>		.tips,.tipsbg{display: none;}		.tipsbg{width: 100%;height: 100%;position: fixed;background: rgba(0, 0, 0, 0.3); top: 0px; left: 0px; right: 0px; bottom: 0px;z-index: 2;}		.tips{width: 160px;height: 200px;position: fixed;background: rgba(0, 0, 0, 0.5); top: 0px; left: 0px; right: 0px; bottom: 0px;z-index: 3;margin: 200px auto 0 auto;border-radius: 10px;}		.tips img{width: 80px;margin: 30px auto;display: block;}		.tipssuc{width: 100%;height: 40px;line-height: 40px;text-align: center;color: #fff;font-size: 16px;}		.sidebar{width:30px;position:fixed;top:300px;left:50%;margin-left:-555px;z-index:9}		.sidebar a {width: 42px;padding: 13px 0;color: #666;background: #fff;-webkit-box-shadow:0px 2px 15px 0px rgba(0,0,0,0.1);box-shadow: 0px 2px 15px 0px rgba(0,0,0,0.1);border-radius: 21px;text-align: center;transition: all .2s cubic-bezier(.215,.61,.355,1);position: relative;cursor: pointer;margin-bottom:15px;display: block;text-decoration:none;}		.sidebar span {font-size: 13px;display: block;padding: 0 12px;line-height: 17px;}		.sidebar a:hover{background-color:#478ede; text-decoration:none;color:#fff;-webkit-box-shadow:0px 0px 10px 0px rgba(0,0,0,0.3);box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.3);}	</style></head><body>	<div id="docopy" class="content">		alskdjf	</div>	<div class="tipsbg" onclick="$('.tips').hide();$('.tipsbg').hide();"></div>	<div id="success" class="tips" onclick="$('.tips').hide();$('.tipsbg').hide();">		<img src="images/cg.png" alt="">		<div class="tipssuc">复制成功</div>	</div>	<div class="sidebar">		<a id="copytext" data-clipboard-action="copy" data-clipboard-target="#docopy" class="fuzhi"><span>一键复制</span></a>	</div>	<script>		$(document).ready(function () {			var clipboard = new ClipboardJS('#copytext');			clipboard.on('success', function (e) {				$('#success').show();				$('.tipsbg').show();			});		});	</script></body></html>