Is it possible to have syntax highlighting for HTML/CSS/JS in ?</a></h1> </div> <div class="grid fw-wrap pb8 mb16 bb bc-black-075"> <div class="grid--cell ws-nowrap mr16 mb8" title="2016-01-12 19:07:53Z"> <span class="fc-light mr2">Asked</span> <time itemprop="dateCreated" datetime="2017-03-30T09:56:52.177" class="fromnow">Mar 30 '17 at 09:56</time> </div> <div class="grid--cell ws-nowrap mr16 mb8"> <span class="fc-light mr2">Active</span> <time class="fromnow" title="2017-03-30T10:30:03.947" datetime="2017-03-30T10:30:03.947">Mar 30 '17 at 10:30</a> </div> <div class="grid--cell ws-nowrap mb8" title="Viewed 6,349 times"> <span class="fc-light mr2">Viewed</span> 6,349 times </div> </div> <div id="mainbar" role="main" aria-label="questions and answers"> <div id="question" class="question" data-questionid="43114438" data-ownerid="5345598" data-score="1"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container grid jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="43114438"> <button class="js-vote-up-btn grid--cell s-btn s-btnunset c-pointer"><svg aria-hidden="true" class="m0 svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 26h32L18 10 2 26z"></path></svg></button> <div class="js-vote-count grid--cell fc-black-500 fs-title grid fd-column ai-center" itemprop="upvoteCount" data-value="1">1</div> <button class="js-bookmark-btn s-btn s-btnunset c-pointer py4"> <svg aria-hidden="true" class="svg-icon iconBookmark" width="18" height="18" viewBox="0 0 18 18"><path d="M6 1a2 2 0 00-2 2v14l5-4 5 4V3a2 2 0 00-2-2H6zm3.9 3.83h2.9l-2.35 1.7.9 2.77L9 7.59l-2.35 1.7.9-2.76-2.35-1.7h2.9L9 2.06l.9 2.77z"></path></svg> <div class="js-bookmark-count mt4" data-value="0">0</div> </button> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"><p>Here's a pen of what I mean:</p> <p><a class="external-link" href="http://codepen.io/archiehicklin/pen/oZQdEG" rel="nofollow noreferrer">http://codepen.io/archiehicklin/pen/oZQdEG</a></p> <p></p><div class="snippet" data-babel="false" data-console="true" data-hide="false" data-lang="js"> <div class="snippet-code"> <pre class="snippet-code-html lang-html prettyprint-override"><code> <textarea id="html" placeholder="HTML"></textarea> <textarea id="css" placeholder="CSS"></textarea> <textarea id="js" placeholder="JS"></textarea> <iframe id="code"></iframe></code></pre> </div> </div> <p>Trying to build a small offline wysiwyg editor and was wondering if it's possible to have some form of real-time syntax highlighting for the code input into textarea - similar to codepen or jsfiddle.</p> <p>I've come across the Codemirror library but it doesn't seem like it would work for live input.</p></div> <div class="mt24 mb12"> <div class="post-taglist grid gs4 gsy fd-column"> <div class="grid ps-relative"> <a href="../../questions/tagged/javascript" class="post-tag js-gps-track" title="show questions tagged 'javascript'" rel="tag">javascript</a> <a href="../../questions/tagged/html" class="post-tag js-gps-track" title="show questions tagged 'html'" rel="tag">html</a> <a href="../../questions/tagged/css" class="post-tag js-gps-track" title="show questions tagged 'css'" rel="tag">css</a> <a href="../../questions/tagged/syntax-highlighting" class="post-tag js-gps-track" title="show questions tagged 'syntax-highlighting'" rel="tag">syntax-highlighting</a> <a href="../../questions/tagged/codemirror" class="post-tag js-gps-track" title="show questions tagged 'codemirror'" rel="tag">codemirror</a> </div> </div> </div> <div class="mb0"> <div class="mt16 grid gs8 gsy fw-wrap jc-end ai-start pt4 mb16"> <div class="grid--cell mr16 fl1 w96"></div> <div class="post-signature grid--cell"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="edited Mar 30 '17 at 10:05">edited Mar 30 '17 at 10:05</time> <a href="../../users/3593640/rashmin-javiya" class="s-avatar s-avatar32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/3593640.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Rashmin Javiya" /> </a> <div class="s-user-card--info"> <a href="../../users/3593640/rashmin-javiya" class="s-user-card--link">Rashmin Javiya</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">5,173</li> <li class="s-award-bling s-award-blinggold" title="3 gold badges">3</li> <li class="s-award-bling s-award-blingsilver" title="27 silver badges">27</li> <li class="s-award-bling s-award-blingbronze" title="49 bronze badges">49</li> </ul> </div> </div> </div> <div class="post-signature owner grid--cell"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Mar 30 '17 at 09:56">asked Mar 30 '17 at 09:56</time> <a href="../../users/5345598/archie" class="s-avatar s-avatar32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/5345598.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Archie" /> </a> <div class="s-user-card--info"> <a href="../../users/5345598/archie" class="s-user-card--link">Archie</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">97</li> <li class="s-award-bling s-award-blinggold" title="1 gold badge">1</li> <li class="s-award-bling s-award-blingsilver" title="2 silver badge">2</li> <li class="s-award-bling s-award-blingbronze" title="6 bronze badge">6</li> </ul> </div> </div> </div> </div> </div> </div> <div class="post-layout--right js-post-comments-component"> <div id="comments-43114438" class="comments js-comments-container bt bc-black-075 mt12 " data-post-id="43114438" data-min-length="15"> <ul class="comments-list js-comments-list" data-remaining-comments-count="0" data-canpost="false" data-cansee="true" data-comments-unavailable="false" data-addlink-disabled="true"> <li id="comment-123713429" class="comment js-comment " data-comment-id="123713429" data-comment-owner-id="" data-comment-score="0"> <div class="js-comment-actions comment-actions"> <div class="comment-score js-comment-edit-hide"> </div> </div> <div class="comment-text js-comment-text-and-form"> <a name="comment123713429_43114438"></a> <div class="comment-body js-comment-edit-hide"> <span class="comment-copy">you have the 2021's answer here https://stackoverflow.com/a/69984857/5781320</span> – <a class="comment-user "></a> <span class="comment-date" dir="ltr"><a class="comment-link" href="../../questions/43114438/is-it-possible-to-have-syntax-highlighting-for-html-css-js-in-textarea#comment123713429_43114438"><span title="2021-11-16T06:58:59.510 License: CC BY-SA 4.0" class="relativetime-clean">Nov 16 '21 at 06:58</span></a></span> </div> </div> </li> </ul> </div> </div> </div> </div> <div id="answers"> <a name="tab-top"></a> <div id="answers-header"> <div class="answers-subheader grid ai-center mb8"> <div class="grid--cell fl1"> <h2 class="mb0" data-answercount="9">1 Answers<span style="display:none;" itemprop="answerCount">1</span></h2> </div> </div> </div> <a name="43114631"></a> <div id="answer-43114631" class="answer accepted-answer" data-answerid="43114631" data-ownerid="2952213" data-score="4" itemprop="acceptedAnswer" itemscope="" itemtype="https://schema.org/Answer"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container grid jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="43114631"> <button class="js-vote-up-btn grid--cell s-btn s-btnunset c-pointer"><svg aria-hidden="true" class="m0 svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 26h32L18 10 2 26z"></path></svg></button> <div class="js-vote-count grid--cell fc-black-500 fs-title grid fd-column ai-center" itemprop="upvoteCount" data-value="4">4</div> <div class="js-accepted-answer-indicator grid--cell fc-green-500 py6 mtn8"><div class="ta-center"><svg aria-hidden="true" class="svg-icon iconCheckmarkLg" width="36" height="36" viewBox="0 0 36 36"><path d="m6 14 8 8L30 6v8L14 30l-8-8v-8z"></path></svg></div></div> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"><p>You cannot directly control syntax highlighting in a textarea. You can try JS libraries like <a class="external-link" href="http://www.cdolivet.com/editarea/" rel="nofollow noreferrer">http://www.cdolivet.com/editarea/</a> or if you just wnat to do it all by yourself, you can go for <strong>contenteditable</strong> . </p> <p>Contenteditable is an html Attribute that enables textarea like editing in any element like <code>div</code> , <code>span</code> etc.</p> <p>Although you will have to use a lot of javascript to interpret the language and highlight it accordingly.</p> <p></p><div class="snippet" data-babel="false" data-console="true" data-hide="false" data-lang="js"> <div class="snippet-code"> <pre class="snippet-code-html lang-html prettyprint-override"><code><div contenteditable="true" style="width:100%;height:200px;border:1px solid #000"> <b>This is bold text</b><br/> <u>This is underlined text</u><br/> and so on..<br/> <font color="#f00">class</font> <font color="#0f0">Sample</font><br/> <em>{</em><br/> </div></code></pre> </div> </div> <p><strong>UPDATE</strong></p> <p>If planning some third party libraries you can go for highlight.js: <a class="external-link" href="https://highlightjs.org/" rel="nofollow noreferrer">https://highlightjs.org/</a></p> <p>It can be integrated with your contenteditable.</p> <p></p><div class="snippet" data-babel="false" data-console="true" data-hide="false" data-lang="js"> <div class="snippet-code"> <pre class="snippet-code-html lang-html prettyprint-override"><code><script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.10.0/highlight.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.10.0/languages/php.min.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.10.0/styles/purebasic.min.css" /> <script>hljs.initHighlightingOnLoad();</script> <pre><code class="html">class test {}</code></pre></code></pre> </div> </div> </div> <div class="mb0"> <div class="mt16 grid gs8 gsy fw-wrap jc-end ai-start pt4 mb16"> <div class="grid--cell mr16 fl1 w96"></div> <div class="post-signature grid--cell"> <div class="user-info "> <div class="user-action-time">edited <span title="2017-03-30T10:30:03.947" class="relativetime">Mar 30 '17 at 10:30</span></div> <div class="user-gravatar32"></div> <div class="user-details" itemprop="author" itemscope="" itemtype="http://schema.org/Person"> <span class="d-none" itemprop="name">Shakti Phartiyal</span> <div class="-flair"></div> </div> </div> </div> <div class="post-signature grid--cell"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="answered Mar 30 '17 at 10:05">answered Mar 30 '17 at 10:05</time> <a href="../../users/2952213/shakti-phartiyal" class="s-avatar s-avatar32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/2952213.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Shakti Phartiyal" /> </a> <div class="s-user-card--info"> <a href="../../users/2952213/shakti-phartiyal" class="s-user-card--link">Shakti Phartiyal</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">6,156</li> <li class="s-award-bling s-award-blinggold" title="3 gold badges">3</li> <li class="s-award-bling s-award-blingsilver" title="25 silver badges">25</li> <li class="s-award-bling s-award-bling__bronze" title="46 bronze badges">46</li> </ul> </div> </div> </div> </div> </div> </div> <div class="post-layout--right js-post-comments-component"> </div> </div> </div> </div> </div> </div> </div> <script src="../../static/js/stack-icons.js"></script> <script src="../../static/js/fromnow.js"></script> </body> </html>