突出显示textarea中的输入

我试图在我的textarea中实现突出显示效果，基本上当用户键入一个句子时，正在添加背景颜色，类似于此效果：http://jsbin.com/josatozeyi/1/edit（我知道这是对textarea的调整大小，但有没有其他方法？）突出显示textarea中的输入

<textarea class='animated'>With CSS transition.</textarea>

有什么建议吗？

附加信息 这就是我的意思：http://prntscr.com/63xdi9

来源

2015-02-11 KingAlfredChameleon

是否确定要加s''到''？ – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/483779/">Stickers</a></span> <span>2015-02-11 20:46:53</span> </small> </span> </p> </div> </div> </div> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">只要它达到预期的结果，并不会弄乱textarea的功能，那么是的:) – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/4156135/">KingAlfredChameleon</a></span> <span>2015-02-11 20:48:28</span> </small> </span> </p> </div> </div> </div> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">我想，如果你以真实的形式使用这个textarea并且可以提交，那就不行了。 – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/483779/">Stickers</a></span> <span>2015-02-11 20:50:28</span> </small> </span> </p> </div> </div> </div> </div> </div> </article> </div> <div class="answer-title"> <span class="text-logo margin-top-sm">A</span> <h2 class="title h4">回答</h2> </div> <div class="item-description text-md markdown-body margin-bottom-40 voidso"> <article class="board-top-1 padding-top-10"> <div class="post-col vote-info"> <span class="count">0<i class="fa fa-thumbs-up"></i></span> </div> <div class="post-offset"> <div class="answer fmt"> <p>添加CSS规则，增加了一个背景色为焦点textarea的。</p> <pre><code class="prettyprint-override">input:focus { background-color: yellow; } </code></pre> </div> <div class="post-info"> <div class="post-meta row"> <p class="text-secondary col-lg-6"> <span class="source"> <a rel="noopener" target="_blank" href="https://stackoverflow.com/q/28463880">来源</a> </span> </p> <p class="text-secondary col-lg-6"> <span class="float-right date"> <span>2015-02-11 20:29:31</span> </p> <p class="col-12"></p> <p class="col-12"></p></div> </div>  <div class="comments"> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">嗨，这个只是使整个textarea背景变成黄色，而不仅仅是文本的特定背景。 – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/4156135/">KingAlfredChameleon</a></span> <span>2015-02-11 20:33:20</span> </small> </span> </p> </div> </div> </div> </div> </div> </article> <div> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6208739752673518" data-ad-slot="1038284119" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <article class="board-top-1 padding-top-10"> <div class="post-col vote-info"> <span class="count">0<i class="fa fa-thumbs-up"></i></span> </div> <div class="post-offset"> <div class="answer fmt"> <p>你可以达到你想要<code class="prettyprint-override">contenteditable</code> span元素，然后在重点应用背景颜色的影响：<a href="http://jsfiddle.net/13L9zudf/" rel="nofollow">http://jsfiddle.net/13L9zudf/</a></p> <p></p> <div class="snippet" data-lang="js" data-hide="false"> <div class="snippet-code" id="sn1"> <pre class="snippet-code-js lang-js prettyprint-override"><code class="prettyprint-override">$(document).ready(function(){ var defaultVal = "Type content here..."; $("div.textbox span").keyup(function(){ if($(this).html() == "") { $(this).html(defaultVal); } }).keydown(function(){ if($(this).html() == defaultVal) { $(this).html(""); } }); });</code></pre> <pre class="snippet-code-css lang-css prettyprint-override"><code class="prettyprint-override">div.textbox { border: 1px #000 solid; padding: .5em; width: 30em; height: 10em; overflow-y: scroll; } div.textbox span { line-height: 1.5em; max-width:30em; display: inline-block; } div.textbox span:focus { background: #ff0; border:0; outline: 0; } div.textbox span:active { border: 0; outline: 0; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code class="prettyprint-override"><script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="textbox"> <span contenteditable="true">Type content here...</span> </div></code></pre> </div> </div> <p></p> </div> <div class="post-info"> <div class="post-meta row"> <p class="text-secondary col-lg-6"> <span class="source"> <a rel="noopener" target="_blank" href="https://stackoverflow.com/q/28464061">来源</a> </span> </p> <p class="text-secondary col-lg-6"> <span class="float-right date"> <span>2015-02-11 20:39:58</span> </p> <p class="col-12"></p> <p class="col-12"></p></div> </div>  <div class="comments"> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">嘿，http://prntscr.com/63xdi9，我想我不清楚，对不起。 – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/4156135/">KingAlfredChameleon</a></span> <span>2015-02-11 20:44:10</span> </small> </span> </p> </div> </div> </div> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">这究竟是什么不适合你的情况？突出显示是否需要更多填充？文字周围的可见框？我不知道我发布的内容如何不能回答你的问题 – <span class="text-secondary"> <small> <span>2015-02-11 20:47:10</span> </small> </span> </p> </div> </div> </div> <div itemprop="comment" class="post-comment"> <div class="row"> <div class="col-lg-1"><span class="text-secondary">+0</span></div> <div class="col-lg-11"> <p class="commenttext">呵呵，首先它是一个非常奇怪的textarea，看起来每次我按下时都会创建一个新的textarea，其次。而不是突出显示特定的文本，它似乎突出显示整个textarea框（也许这可能是填充问题？）。此外，我不会降级你的答案，我非常感谢你的帮助！ – <span class="text-secondary"> <small> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/4156135/">KingAlfredChameleon</a></span> <span>2015-02-11 20:50:47</span> </small> </span> </p> </div> </div> </div> </div> </div> </article> <article class="board-top-1 padding-top-10"> <div class="post-col vote-info"> <span class="count">1<i class="fa fa-thumbs-up"></i></span> </div> <div class="post-offset"> <div class="answer fmt"> <p>它太复杂，我，但我发现它，它可能是有用的：</p> <blockquote> <p>highlightTextarea的目标是将文本的某些部分高亮显示为textarea 或输入。它可以突出显示一组单词或特定范围。</p> </blockquote> <p><a href="http://mistic100.github.io/jquery-highlighttextarea/" rel="nofollow">http://mistic100.github.io/jquery-highlighttextarea/</a></p> <p>来源：<a href="https://github.com/mistic100/jquery-highlighttextarea" rel="nofollow">mistic100</a></p> </div> <div class="post-info"> <div class="post-meta row"> <p class="text-secondary col-lg-6"> <span class="source"> <a rel="noopener" target="_blank" href="https://stackoverflow.com/q/28464442">来源</a> </span> </p> <p class="text-secondary col-lg-6"> <span class="float-right date"> <span>2015-02-11 21:03:43</span> <a rel="noopener" target="_blank" href="https://stackoverflow.com/users/483779/">Stickers</a></span> </p> <p class="col-12"></p> <p class="col-12"></p></div> </div> </div> </article> </div> <div class="clearfix"> </div> <div class="relative-box"> <div class="relative">相关问题</div> <ul class="relative_list"> <li> 1. <a href="http://www.uwenku.com/question/p-nduwejyl-ph.html" target="_blank" title="动态突出显示textarea"> 动态突出显示textarea </a> </li> <li> 2. <a href="http://www.uwenku.com/question/p-uwbwvmgk-ht.html" target="_blank" title="突出显示textarea中的句子"> 突出显示textarea中的句子 </a> </li> <li> 3. <a href="http://www.uwenku.com/question/p-geljijfq-ok.html" target="_blank" title="获取突出显示的输入值"> 获取突出显示的输入值 </a> </li> <li> 4. <a 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