需求如下:点击按钮复制对应内容到剪贴板

方案:利用document.execCommand('copy')来实现,但是要注意兼容性。

 <div class="assistant-wechat">小助理微信号:qbxq01</div>        <div class="copy-wechat" onclick="copyToClipboard('qbxq01')">复制微信号</div>
<script type="text/javascript">    function copyToClipboard(text) {        if (text.indexOf('-') !== -1) {            let arr = text.split('-');            text = arr[0] + arr[1];        }        var textArea = document.createElement("textarea");        textArea.style.position = 'fixed';        textArea.style.top = '0';        textArea.style.left = '0';        textArea.style.width = '2em';        textArea.style.height = '2em';        textArea.style.padding = '0';        textArea.style.border = 'none';        textArea.style.outline = 'none';        textArea.style.boxShadow = 'none';        textArea.style.background = 'transparent';        textArea.value = text;        document.body.appendChild(textArea);        textArea.select();        try {            var successful = document.execCommand('copy');            var msg = successful ? '<div>小助理微信号已复制</div><div>快去加好友邀你入群</div>' : '<div>该浏览器不支持点击复制到剪贴板</div>';            showAlert(msg)        } catch (err) {            showAlert('<div>该浏览器不支持点击复制到剪贴板</div>');        }        document.body.removeChild(textArea);    }    // 自定义提示框    function showAlert(str) {        var alertPart = document.createElement('div');        alertPart.className = "alert-part";        alertPart.innerHTML = str;        document.body.appendChild(alertPart);        var timeout = setTimeout(function () {            document.body.removeChild(alertPart);            clearTimeout(timeout);        }, 2000)    }</script>