Line Number Enhancements for HTML Textarea

Question: How can line numbers be displayed in the left margin of a element?</p> <p><strong>Answer:</strong></p> <p><strong>Introducing CodeMirror</strong></p> <p>Highly recommended by members of the community is CodeMirror, a powerful tool that excels in displaying line numbers.</p> <p><strong>Implementation</strong></p> <p>CodeMirror offers effortless integration. Incorporate it into your project by implementing the following code:</p> <pre class="brush:php;toolbar:false">var editor = CodeMirror.fromTextArea(document.getElementById('code'), { lineNumbers: true, mode: 'text/x-perl', theme: 'abbott', });</pre> <p>In this example:</p> <ul> <li>The lineNumbers property enables line numbering.</li> <li>mode specifies the syntax highlighting for Perl.</li> <li>theme sets the appearance of the editor to "Abbott" style.</li> </ul> <p><strong>Demo</strong></p> <p>Experience a fully functional demonstration of CodeMirror with line numbers within the StackOverflow sandbox:</p> <pre class="brush:php;toolbar:false"><script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/codemirror.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/mode/perl/perl.min.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/codemirror.min.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/theme/abbott.min.css"> <textarea></pre> <p><strong>Additional Considerations</strong></p> <p>Other solutions may encounter issues with line number alignment. This is often due to monitor DPI settings that are not accounted for. However, CodeMirror handles these situations effectively.</p><p>The above is the detailed content of How to Add Line Numbers to an HTML Textarea?. For more information, please follow other related articles on the PHP Chinese website!</p> </div> </div> <div id="377j5v51b" class="wzconShengming_sp"> <div id="377j5v51b" class="bzsmdiv_sp">Statement of this Website</div> <div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. 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No need to pursue consistency of all browsers,</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796834914.html" title="What is the difference between display: inline, display: block, and display: inline-block?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175217550090568.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What is the difference between display: inline, display: block, and display: inline-block?" /> </a> <a href="http://www.miracleart.cn/faq/1796834914.html" title="What is the difference between display: inline, display: block, and display: inline-block?" class="phphistorical_Version2_mids_title">What is the difference between display: inline, display: block, and display: inline-block?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 11, 2025 am 03:25 AM</span> <p class="Articlelist_txts_p">Themaindifferencesbetweendisplay:inline,block,andinline-blockinHTML/CSSarelayoutbehavior,spaceusage,andstylingcontrol.1.Inlineelementsflowwithtext,don’tstartonnewlines,ignorewidth/height,andonlyapplyhorizontalpadding/margins—idealforinlinetextstyling</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796834918.html" title="Styling visited links differently with CSS" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175217558128323.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Styling visited links differently with CSS" /> </a> <a href="http://www.miracleart.cn/faq/1796834918.html" title="Styling visited links differently with CSS" class="phphistorical_Version2_mids_title">Styling visited links differently with CSS</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 11, 2025 am 03:26 AM</span> <p class="Articlelist_txts_p">Setting the style of links you have visited can improve the user experience, especially in content-intensive websites to help users navigate better. 1. Use CSS's: visited pseudo-class to define the style of the visited link, such as color changes; 2. Note that the browser only allows modification of some attributes due to privacy restrictions; 3. The color selection should be coordinated with the overall style to avoid abruptness; 4. The mobile terminal may not display this effect, and it is recommended to combine it with other visual prompts such as icon auxiliary logos.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796833145.html" title="Creating custom shapes with css clip-path" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175199577133591.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Creating custom shapes with css clip-path" /> </a> <a href="http://www.miracleart.cn/faq/1796833145.html" title="Creating custom shapes with css clip-path" class="phphistorical_Version2_mids_title">Creating custom shapes with css clip-path</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 09, 2025 am 01:29 AM</span> <p class="Articlelist_txts_p">Use the clip-path attribute of CSS to crop elements into custom shapes, such as triangles, circular notches, polygons, etc., without relying on pictures or SVGs. Its advantages include: 1. Supports a variety of basic shapes such as circle, ellipse, polygon, etc.; 2. Responsive adjustment and adaptable to mobile terminals; 3. Easy to animation, and can be combined with hover or JavaScript to achieve dynamic effects; 4. It does not affect the layout flow, and only crops the display area. Common usages are such as circular clip-path:circle (50pxatcenter) and triangle clip-path:polygon (50%0%, 100 0%, 0 0%). Notice</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796837251.html" title="How to create responsive images using CSS?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175251305059116.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to create responsive images using CSS?" /> </a> <a href="http://www.miracleart.cn/faq/1796837251.html" title="How to create responsive images using CSS?" class="phphistorical_Version2_mids_title">How to create responsive images using CSS?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 15, 2025 am 01:10 AM</span> <p class="Articlelist_txts_p">To create responsive images using CSS, it can be mainly achieved through the following methods: 1. Use max-width:100% and height:auto to allow the image to adapt to the container width while maintaining the proportion; 2. Use HTML's srcset and sizes attributes to intelligently load the image sources adapted to different screens; 3. Use object-fit and object-position to control image cropping and focus display. Together, these methods ensure that the images are presented clearly and beautifully on different devices.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796832540.html" title="Demystifying CSS Units: px, em, rem, vw, vh comparisons" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175191219061804.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Demystifying CSS Units: px, em, rem, vw, vh comparisons" /> </a> <a href="http://www.miracleart.cn/faq/1796832540.html" title="Demystifying CSS Units: px, em, rem, vw, vh comparisons" class="phphistorical_Version2_mids_title">Demystifying CSS Units: px, em, rem, vw, vh comparisons</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 08, 2025 am 02:16 AM</span> <p class="Articlelist_txts_p">The choice of CSS units depends on design requirements and responsive requirements. 1.px is used for fixed size, suitable for precise control but lack of elasticity; 2.em is a relative unit, which is easily caused by the influence of the parent element, while rem is more stable based on the root element and is suitable for global scaling; 3.vw/vh is based on the viewport size, suitable for responsive design, but attention should be paid to the performance under extreme screens; 4. When choosing, it should be determined based on whether responsive adjustments, element hierarchy relationships and viewport dependence. Reasonable use can improve layout flexibility and maintenance.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://www.miracleart.cn/faq/1796847484.html" title="What are common CSS browser inconsistencies?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175348469118409.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What are common CSS browser inconsistencies?" /> </a> <a href="http://www.miracleart.cn/faq/1796847484.html" title="What are common CSS browser inconsistencies?" class="phphistorical_Version2_mids_title">What are common CSS browser inconsistencies?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 26, 2025 am 07:04 AM</span> <p class="Articlelist_txts_p">Different browsers have differences in CSS parsing, resulting in inconsistent display effects, mainly including the default style difference, box model calculation method, Flexbox and Grid layout support level, and inconsistent behavior of certain CSS attributes. 1. The default style processing is inconsistent. The solution is to use CSSReset or Normalize.css to unify the initial style; 2. The box model calculation method of the old version of IE is different. It is recommended to use box-sizing:border-box in a unified manner; 3. Flexbox and Grid perform differently in edge cases or in old versions. More tests and use Autoprefixer; 4. Some CSS attribute behaviors are inconsistent. CanIuse must be consulted and downgraded.</p> </div> </div> <a href="http://www.miracleart.cn/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div id="377j5v51b" class="footer"> <div id="377j5v51b" class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div id="377j5v51b" class="footermid"> <a href="http://www.miracleart.cn/about/us.html">About us</a> <a href="http://www.miracleart.cn/about/disclaimer.html">Disclaimer</a> <a href="http://www.miracleart.cn/update/article_0_1.html">Sitemap</a> </div> <div id="377j5v51b" class="footerbottom"> <p> ? php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> <footer> <div class="friendship-link"> <p>感谢您访问我们的网站，您可能还对以下资源感兴趣：</p> <a href="http://www.miracleart.cn/" title="国产av日韩一区二区三区精品">国产av日韩一区二区三区精品</a> <div class="friend-links"> </div> </div> </footer> <script> (function(){ var bp = document.createElement('script'); 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