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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<textarea id="copy">acret</textarea>
<input type="button" οnclick="copy();" value="点击复制"></input>
</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>
