<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>target-div</title>
</head>
<body>
    <div id="helloDiv">hello</div>
    <button class="btn" data-clipboard-action="copy" data-clipboard-target="#helloDiv">Copy</button>
    <script src="https://cdn.jsdelivr.net/npm/clipboard@2.0.6/dist/clipboard.min.js"></script>
    <script>
        //这一句不行,是个坑.现在官网是推荐new ClipboardJS
       // var clipboard = new Clipboard('.btn');
        var clipboard = new ClipboardJS('.btn');
        clipboard.on('success', function(e) {
            console.log(e.text);
            e.clearSelection();
        });
    
        clipboard.on('error', function(e) {
            console.log(e.text);
            
        });
    </script>
</body>
</html>