Adding Line Numbers to HTML Textarea: A Guide When dealing with elements in HTML, displaying line numbers alongside the text can be a valuable feature for readability and editing accuracy. Let's explore a comprehensive solution to this task.</p> <p><strong>CodeMirror</strong></p> <p>The most recommended tool for adding line numbers to textareas is CodeMirror. It's a popular open-source JavaScript library that provides a wide range of features for text editing. To use CodeMirror, simply include the library and instantiate it with the appropriate options.</p> <p><strong>Live Demo</strong></p> <p>Here's a working demo illustrating the use of CodeMirror for line numbering:</p> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre>var editor = CodeMirror.fromTextArea(document.getElementById('code'), { lineNumbers: true, mode: 'text/x-perl', theme: 'abbott', });</pre><div class="contentsignin">Copy after login</div></div> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre><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><div class="contentsignin">Copy after login</div></div> <p><strong>Additional Tips</strong></p> <p>If you're facing issues with line numbers not matching up with the actual lines, it's possible that your monitor's dots per inch (DPI) is set higher than 100%. CodeMirror takes this into account, but other solutions may not.</p> <p><strong>Conclusion</strong></p> <p>CodeMirror is a reliable and powerful solution for adding line numbers to textareas in HTML. It provides a range of customization options and integrates seamlessly with HTML elements.</p>
