<script src="clipboard.js-master/dist/clipboard.min.js" type="text/javascript"></script>
<input id="foo" value="這里是內(nèi)容123">
<button class="btn" data-clipboard-target="#foo">點擊復制</button>
<script>
    var clipboard = new Clipboard('.btn');
    clipboard.on('success', function(e) {
        alert("復制成功!");
        e.clearSelection();
    });
    clipboard.on('error', function(e) {
        alert("復制失敗!");
    });
</script>

clipboard 下載地址：https://pan.baidu.com/s/1c2EVJxe
來源：https://www.huoduan.com/clipboardjs.html