JS点击复制文本

html

<p>邀请码:<i>999999999999</i> <span class="copys">复制</span> </p>
            <textarea rows="" style="display:none" cols="">999999999999</textarea>

        $(".copys").on("touchstart", function() {
            $('textarea').select();
            document.execCommand("Copy");
            alert("复制成功!");
        });