textarea如何实现水印提示 - 问答

要实现水印提示，可以通过在标签中使用placeholder属性来添加水印提示。placeholder属性允许您在文本框中显示灰色文本，以指示用户应该输入的内容。</p> <p>示例代码如下：</p> <pre class="hljs"><code><span class="hljs-tag"><<span class="hljs-name">textarea</span> <span class="hljs-attr">placeholder</span>=<span class="hljs-string">"请输入您的内容"</span>></span><span class="hljs-tag"></<span class="hljs-name">textarea</span>></span> </code></pre> <p>这样，当用户未输入任何内容时，文本框中会显示灰色的“请输入您的内容”提示文字，一旦用户开始输入内容，水印提示就会消失。这是一种简单而有效的方法来实现水印提示。</p> </p> </div> <p class="tj-wenzhang recommend-article"></p> <div class="zixun-tj-product adv-bottom"></div> <div class="user-estimate clearfix"> <div class="like"><i></i><span>0</span> 赞</div> <div class="dislike"><i></i><span>0</span> 踩</div> </div> </div> </div> <div class="prve-next-qanews"> <ul> </ul> </div> <div class="hot-answer"> <div class="hot-answer-tit"><h2>最新问答</h2></div> <div class="hot-answer-list"> <ul> <li> <a href="/ask/95449398.html">linux的nc命令常见错误怎么办</a> </li> <li> <a href="/ask/48204414.html">linux的nc命令参数有哪些</a> </li> <li> <a href="/ask/38816244.html">linux的nc命令如何使用</a> </li> <li> <a href="/ask/60648406.html">linux的nc命令有何作用</a> </li> <li> <a href="/ask/31996033.html">webview android安全如何保障</a> </li> <li> <a href="/ask/34979704.html">webview android性能如何优化</a> </li> <li> <a href="/ask/78248836.html">webview android能进行哪些操作</a> </li> <li> <a href="/ask/52695912.html">webview android怎样处理缓存</a> </li> <li> <a href="/ask/31980790.html">webview android如何加载网页</a> </li> </ul> </div> </div> </div> <div class="qa-box-right"> <div class="hot-product-link adv-right"></div> <div class="browse-other-question"> <div class="other-question-tit"><i></i>相关问答</div> <div class="other-question-list"> <ul> <li> <a href="/ask/57501196.html">textarea滚动条怎么实现</a> </li> <li> <a href="/ask/20464259.html">php确认取消提示功能怎么实现</a> </li> <li> <a href="/ask/46751227.html">android弹出提示框怎么实现</a> </li> <li> <a href="/ask/1121734.html">利用Golang和FFmpeg实现视频水印的添加</a> </li> <li> <a href="/ask/71942427.html">利用Golang和FFmpeg实现视频水印的去除</a> </li> <li> <a href="/ask/48058802.html">sqldeveloper自动提示表名怎么实现</a> </li> <li> <a href="/ask/1771522.html">plsql智能提示字段怎么实现</a> </li> <li> <a href="/ask/68241257.html">Python怎么实现图片添加水印</a> </li> <li> <a href="/ask/72511115.html">textarea怎样实现富文本编辑</a> </li> </ul> </div> </div> <div class="hot-tag"> <div class="hot-tag-tit"><h2>相关标签</h2></div> <div class="hot-tag-list clearfix"> <a href="/ask/tags/14335/">contextconfiglocation</a> <a href="/ask/tags/17373/">applicationcontext.xml</a> <a href="/ask/tags/17659/">contextPath</a> <a href="/ask/tags/17725/">accepttext</a> <a href="/ask/tags/18473/">textout</a> <a href="/ask/tags/18613/">responseText</a> <a href="/ask/tags/18669/">textbox</a> <a href="/ask/tags/19159/">cssText</a> <a href="/ask/tags/20005/">richtextbox</a> <a href="/ask/tags/20169/">InitialContext</a> <a href="/ask/tags/20607/">outtextxy</a> <a href="/ask/tags/20903/">nextcloud</a> <a href="/ask/tags/21415/">Sublime Text</a> <a href="/ask/tags/21539/">text-align</a> <a href="/ask/tags/21661/">drawtext</a> <a href="/ask/tags/21807/">contextmenustrip</a> <a href="/ask/tags/22141/">extractAll</a> <a href="/ask/tags/22433/">ActionContext</a> <a href="/ask/tags/22515/">TextWatcher</a> <a href="/ask/tags/22577/">externalinterface</a> </div> </div> </div> </div> </div> <div class="footer"> <div class="other-link clearfix"> <div class="link-look clearfix"> <div class="link-list"> <div class="link-title">产品服务</div> <ul> <li><a href="/cloud/">云服务器</a></li> <li><a href="/ddos/">高防服务器</a></li> <li><a href="/ip/">高防IP</a></li> <li><a href="/physicsserver/">裸金属服务器</a></li>  <li><a href="/trusteeship/">机柜租用</a></li> <li><a href="/ssl/">SSL证书</a></li> <li><a href="/ddoscdn/">高防CDN</a></li> <li><a href="/elasticip/">弹性IP</a></li>  </ul> </div> <div class="link-list"> <div class="link-title">地区划分</div> <ul>  <li><a href="/hk/">中国香港服务器</a></li> <li><a href="/usa/">美国服务器</a></li> <li><a href="/germany/">德国服务器</a></li> <li><a href="/japan/">日本服务器</a></li> <li><a href="/korea/">韩国服务器</a></li> <li><a href="/singapore/">新加坡服务器</a></li> </ul> </div> <div class="link-list"> <div class="link-title">专题活动</div> <ul> <li><a href="https://uc.yisu.com/vhost" rel="nofollow" target="_blank" class="c_login">控制台</a></li> <li><a href="/appmarket/">应用市场</a></li> <li><a href="/coupon/">最新活动</a></li> <li><a href="https://www.jiuma.com/" target="_blank">九马智能直播</a></li>   </ul> </div> <div class="link-list"> <div class="link-title">帮助支持</div> <ul> <li><a href="/help/">帮助中心</a></li> <li><a href="/help/index_38_41.html">网站备案</a></li> <li><a href="/help/index_45_46.html" rel="nofollow">法律条款</a></li> <li><a href="/city/">全国服务</a></li> <li><a href="/cve/">安全漏洞</a></li> <li><a href="/theme/">主题地图</a></li> </ul> </div> <div class="link-list"> <div class="link-title">关于我们</div> <ul> <li><a href="/about/" rel="nofollow">关于亿速云</a></li> <li><a href="/case/">客户案例</a></li> <li><a href="/news/">新闻资讯</a></li> <li><a href="/zixun/time/">资讯地图</a></li> <li><a href="/ask/time/">问答地图</a></li> <li><a href="/about/contact.html">联系我们</a></li> <li><a href="/employ/">人才招聘</a></li> </ul> </div> </div> <div class="yisu-contact"> <div class="contact-tit">售后咨询</div> <div class="yisu-phone">7*24小时在线电话：<span>400-100-2938</span></div> <div class="yisu-qq">7*24小时在线 QQ：<span>800811969</span></div> <div class="guanzhu-tit">关注亿速云</div> <div class="erweima-box clearfix"> <div class="wechat-erwei"> <img src="https://cache.yisu.com/www/images/ys-gzh-erweima.png" alt=""> <p>亿速云公众号</p> </div> <div class="phonenet-erwei"> <img src="https://cache.yisu.com/www/images/ys-web-erweima.png" alt=""> <p>手机网站二维码</p> </div> </div> </div> </div> <div class="footer-bottom"> <p>Copyright © Yisu Cloud Ltd. All Rights Reserved. 2018 版权所有</p> <p><span>广州亿速云计算有限公司</span><span><a href="http://beian.miit.gov.cn/" style="color: #6C6E73;" target="_blank" rel="nofollow">粤ICP备17096448号-1</a> </span><span><span class="police-icon"></span>粤公网安备 44010402001142号</span><span>增值电信业务经营许可证编号：B1-20181529</span></p> </div> </div> <div class="common-backtop-link"><i></i></div> <script type="text/javascript" src="https://cache.yisu.com/www/js/qa/qa.js?v=1732443279&v=202410311444"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery.SuperSlide.2.1.js?v=202410311444"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery-ui.js?v=202410311444"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery.flexslider-min.js?v=202410311444"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/common/common.js?v=202410311444"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/common/kfonline.js?v=202410311444"></script> <script type="text/javascript"> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?0910b1e24e81c0e61462b7a766830fec"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); $('.fifth_ic').hover(function(){ $(this).children('.erweima_box').show() },function(){ $(this).children('.erweima_box').hide() }) })(); (function(b,a,e,h,f,c,g,s){b[h]=b[h]||function(){(b[h].c=b[h].c||[]).push(arguments)}; b[h].s=!!c;g=a.getElementsByTagName(e)[0];s=a.createElement(e); s.src="//s.union.360.cn/"+f+".js";s.defer=!0;s.async=!0;g.parentNode.insertBefore(s,g) })(window,document,"script","_qha",340413,false); </script> <script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script> </body> </html> <script type="text/javascript" src="https://cache.yisu.com/www/vendor/highlight/highlight.js"></script> <script>hljs.initHighlightingOnLoad();</script> <script> document.addEventListener('DOMContentLoaded', (event) => { document.querySelectorAll('pre').forEach((block) => { hljs.highlightBlock(block); }); }); </script> <script> var page_position = 'detail'; parseInLinks(); getDetialQuantities(); </script>