jquery复制到剪切板

<script>
    function copylink(){
        var text = $('.sharelink').text();
        copyToClipboard(text)
    }

    //复制到剪贴板
    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 ? '成功复制到剪贴板' : '该浏览器不支持点击复制到剪贴板';
            parent.layer.alert(msg);
            $('textarea').hide();
        } catch (err) {
            alert('该浏览器不支持点击复制到剪贴板');
        }
    }
</script>