<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<textarea id="copy">acret</textarea>
<button type="primary" onclick="copy()">点击复制</button>
</body>
<script type="text/javascript">
function copy() {
console.log('aaa')
var e = document.getElementById("copy");
e.select(); // 选择对象
document.execCommand("Copy"); // 执行浏览器复制命令
alert("复制成功！");
}
</script>
</html>