Questions
HTML questions
Choose a question page, learn the concept, then test your understanding with a quiz.
How to Create Indentation in HTML Without Repeating
Learn why HTML ignores tab spacing, when works, and the correct CSS and semantic ways to create indentation in HTML.
How to Create a Checkbox With a Clickable Label in HTML
Learn how to create an HTML checkbox with a clickable label using the label element, for attribute, and accessible form patterns.
How to Create a Placeholder for a Select Box in HTML and CSS
Learn how to create a placeholder-like option for a select box using HTML, CSS, and JavaScript, with beginner-friendly examples.
How to Create a div Element in jQuery
Learn how to create a div element in jQuery, add content and attributes, and insert it into the page with clear examples.
How to Disable Browser Autocomplete on Form Inputs in HTML
Learn how browser autocomplete works in HTML forms, when `autocomplete="off"` helps, and the limits across major browsers.
How to Disable Textarea Resizing in CSS
Learn how to disable the resizable property of a textarea using CSS. See syntax, examples, common mistakes, and practical use cases.
How to Display Base64 Images in HTML
Learn how to display Base64 images in HTML using data URLs, with examples, common mistakes, and practical usage patterns.
How to Embed a PDF in HTML: iframe vs object vs embed
Learn the recommended ways to embed a PDF in HTML using iframe, object, and embed, with examples, fallbacks, and browser support tips.
How to Enable and Disable a Submit Button with jQuery
Learn how to enable and disable a submit button in jQuery based on text input value, with examples, mistakes, and practical patterns.
How to Fix "An invalid form control with name='' is not focusable" in HTML Forms and ASP.NET Web Forms
Learn why Chrome shows "An invalid form control is not focusable" and how to fix hidden invalid fields in HTML forms and ASP.NET Web Forms.
How to Get Input Text Box Values with jQuery
Learn how to read and display input field values with jQuery using val(), events, and practical examples for beginners.
How to Get a data-id Attribute in jQuery
Learn how to read a data-id attribute in jQuery using .attr() and .data(), including click handlers, event binding, and common mistakes.
How to Get an HTML Element’s Width and Height in JavaScript
Learn how to measure an HTML element’s width and height in JavaScript using offsetWidth, clientWidth, getBoundingClientRect, and more.
How to Get the Selected Option from a Dropdown in jQuery
Learn how to get the selected dropdown value or text in jQuery, why .val() works, and common mistakes with select elements.
How to Get the X and Y Position of an HTML Element in JavaScript
Learn how to get an element's X and Y position in JavaScript using getBoundingClientRect, offsets, and scroll-aware approaches.
How to Handle :hover in Inline CSS for HTML and Email
Learn why :hover cannot be written in inline CSS, how CSS pseudo-classes work, and practical alternatives for HTML and email styling.
How to Hide HTML5 Number Input Spin Buttons with CSS
Learn how to hide number input spin buttons using CSS, browser-specific rules, and practical form styling tips for HTML5 inputs.
How to Hide the Scrollbar While Keeping Scrolling in CSS
Learn how to hide scrollbars while preserving scrolling using CSS in Chrome, Firefox, and older Edge/IE browsers.
How to Horizontally Center a div in CSS
Learn how to horizontally center a div in CSS using margin auto, flexbox, and other common layout techniques with simple examples.
How to Maintain a Div Aspect Ratio with CSS
Learn how to keep a div responsive while preserving its aspect ratio using pure CSS, with modern and fallback techniques.