# W3Tweaks

> Free frontend development tutorials covering CSS, JavaScript, HTML, and AI-powered frontend — with copy-ready code, live demos, and honest comparisons of the tools developers actually use.

W3Tweaks publishes deep-dive tutorials for frontend developers who want to ship better code. Every article includes a working live demo, runnable code samples, and links to authoritative references. Recent focus areas include AI integration (OpenAI API, Ollama, chatbot widgets), modern CSS (container queries, view transitions, skeleton loading), and prompt engineering for developers.

## Featured tutorials

- [Run AI Locally with Ollama and JavaScript](https://www.w3tweaks.com/javascript/run-ai-locally-ollama-javascript/) — Ollama lets you run powerful AI models like Llama 3, Mistral, and Gemma entirely on your own machine — free forever, no API key, zero data…
- [GitHub Copilot vs Claude vs ChatGPT: Which Writes Better CSS?](https://www.w3tweaks.com/guide/github-copilot-vs-claude-vs-chatgpt-css/) — We gave the same 6 frontend tasks to GitHub Copilot, Claude, and ChatGPT and scored every output honestly. Spoiler: each tool has a clear s…
- [CSS Container Queries: Components That Respond to Their Parent](https://www.w3tweaks.com/css/css-container-queries-explained/) — Media queries respond to the viewport. Container queries respond to the parent element. This single difference unlocks truly reusable compo…
- [CSS View Transitions API: Animate Pages Without Libraries](https://www.w3tweaks.com/css/css-view-transitions-api/) — The View Transitions API lets you animate between any two DOM states with a single JavaScript call and pure CSS. No animation library neede…
- [Build a Chatbot Widget with HTML, CSS & JavaScript](https://www.w3tweaks.com/javascript/add-chatbot-widget-website-html-css-javascript/) — Build a floating chat bubble widget that opens into a full AI chat panel — pure HTML, CSS, and Vanilla JavaScript. Connects to OpenAI, stre…
- [Build an AI Color Palette Generator with JavaScript](https://www.w3tweaks.com/javascript/build-ai-color-palette-generator-javascript/) — Build a real working tool: type a mood or theme, and AI generates a five-color palette with names and use cases. Pure HTML, CSS, and Vanill…
- [Web Speech API: Build a Voice Command UI in JavaScript](https://www.w3tweaks.com/javascript/javascript-web-speech-api-voice-command-ui/) — The Web Speech API lets you add voice input and text-to-speech to any website with zero dependencies. This tutorial builds a fully working…
- [Prompt Engineering for Frontend Developers](https://www.w3tweaks.com/guide/prompt-engineering-frontend-developers/) — Vague prompts get vague code. This guide shows frontend developers exactly how to write prompts that produce clean, working CSS and JavaScr…

## Categories

- [CSS (61 tutorials)](https://www.w3tweaks.com/css/) — Modern CSS techniques — flexbox, grid, container queries, animations, custom properties, and copy-ready components.
- [JavaScript (34 tutorials)](https://www.w3tweaks.com/javascript/) — JavaScript tutorials covering ES features, DOM, async, the Fetch API, and AI-powered frontend patterns.
- [HTML (6 tutorials)](https://www.w3tweaks.com/html/) — Semantic HTML, forms, media tags, and accessibility patterns for the modern web.
- [Guide (31 tutorials)](https://www.w3tweaks.com/guide/) — Step-by-step frontend guides, debugging tips, AI tool comparisons, and developer workflow advice.

## Full article index

### CSS

- [403 Forbidden Page: SVG eye illustration and CSS animation](https://www.w3tweaks.com/css/403-forbidden-page-svg-eye-illustration-and-css-animation/)
- [500 Error: Log File / Stack Trace Animation](https://www.w3tweaks.com/css/500-error-log-file-stack-trace-animation/)
- [Animated Stacked Slider with jQuery and Slick.js plugin](https://www.w3tweaks.com/css/animated-stacked-slider-with-jquery-and-slick-js-plugin/)
- [24 Best Free CSS Responsive Infographics](https://www.w3tweaks.com/css/best-free-css-responsive-infographics/)
- [Bootstrap Year Calendar](https://www.w3tweaks.com/css/bootstrap-year-calendar/)
- [Contact form Validation using Bootstrap 3](https://www.w3tweaks.com/css/contact-form-validation-using-bootstrap-3/)
- [CSS Advent Calendar](https://www.w3tweaks.com/css/css-advent-calendar/)
- [13 Free HTML & CSS Dashboard Template Designs](https://www.w3tweaks.com/css/css-and-html-dashboard-templates/)
- [CSS Animated Modal Window](https://www.w3tweaks.com/css/css-animated-modal-window/)
- [42 Cool CSS Avatars For Better UI](https://www.w3tweaks.com/css/css-avatars/)
- [12 CSS Best practices](https://www.w3tweaks.com/css/css-best-practices/)
- [CSS Button Flip Animation](https://www.w3tweaks.com/css/css-button-flip-animation/)
- [59 Free CSS Buttons](https://www.w3tweaks.com/css/css-buttons/)
- [131 CSS Cards Collections: Free Code + Demos](https://www.w3tweaks.com/css/css-cards/)
- [CSS Cascading text effects using Splitting.js and ScrollOut](https://www.w3tweaks.com/css/css-cascading-text-effects-using-splitting-js-and-scrollout/)
- [CSS Container Queries: Components That Respond to Their Parent](https://www.w3tweaks.com/css/css-container-queries-explained/)
- [13 Cool CSS Emoji Rating](https://www.w3tweaks.com/css/css-emoji-rating/)
- [34 CSS Flip Cards](https://www.w3tweaks.com/css/css-flip-cards/)
- [15 Free CSS Floating Action Buttons](https://www.w3tweaks.com/css/css-floating-action-buttons/)
- [Get 28 CSS loaders](https://www.w3tweaks.com/css/css-loaders-spinners/)
- [10 CSS Logo Designs](https://www.w3tweaks.com/css/css-logo-designs/)
- [CSS Masonry Grid Layouts: An Overview](https://www.w3tweaks.com/css/css-masonry-grid-layouts-an-overview/)
- [CSS Neumorphic Toggle](https://www.w3tweaks.com/css/css-neumorphic-toggle/)
- [CSS Positioning: A Beginner's Guide to Mastering the Position Property](https://www.w3tweaks.com/css/css-positioning/)
- [CSS Potato 500 Error page](https://www.w3tweaks.com/css/css-potato-500-error-page/)
- [8 CSS Re-sizable Panes](https://www.w3tweaks.com/css/css-re-sizable-panes/)
- [11 CSS Shopping Cart UI/UX](https://www.w3tweaks.com/css/css-shopping-cart-ui-ux/)
- [CSS Skeleton Loading Screens with Shimmer Animation](https://www.w3tweaks.com/css/css-skeleton-loading-screens/)
- [40 CSS Slideshows](https://www.w3tweaks.com/css/css-slideshows/)
- [49 CSS Tables](https://www.w3tweaks.com/css/css-tables/)
- [19 CSS Thumbnails](https://www.w3tweaks.com/css/css-thumbnails/)
- [10 Free CSS Toast/Notification](https://www.w3tweaks.com/css/css-toast-notification/)
- [CSS Transform Origin illustration Example](https://www.w3tweaks.com/css/css-transform-origin-illustration-example/)
- [CSS Transition: The Basics Explained](https://www.w3tweaks.com/css/css-transition-the-basics-explained/)
- [CSS View Transitions API: Animate Pages Without Libraries](https://www.w3tweaks.com/css/css-view-transitions-api/)
- [CSS3 3D Button Effects](https://www.w3tweaks.com/css/css3-3d-button-effects/)
- [Desktop diagonal media block using CSS and HTML](https://www.w3tweaks.com/css/desktop-diagonal-media-block-using-css-and-html/)
- [Easy customizable simple CSS buttons](https://www.w3tweaks.com/css/easy-customizable-simple-css-buttons/)
- [Flexbox responsive calendar](https://www.w3tweaks.com/css/flexbox-responsive-calendar/)
- [36 Free CSS 3D Text Effects](https://www.w3tweaks.com/css/free-css-3d-text-effects/)
- [25 Free CSS Search Bars with Expanding Functionalities](https://www.w3tweaks.com/css/free-css-expanding-search-bar/)
- [24 Free CSS Tab Bars](https://www.w3tweaks.com/css/free-css-tab-bars/)
- [Google-style Loading Animation using css keyframers](https://www.w3tweaks.com/css/google-style-loading-animation-using-css-keyframers/)
- [67 CSS Gallery](https://www.w3tweaks.com/css/hand-picked-css-gallery/)
- [15 CSS Sliders](https://www.w3tweaks.com/css/hand-picked-free-css-sliders-collections/)
- [19 Handy Credit Card UI/UX for Web Designers](https://www.w3tweaks.com/css/handy-credit-card-ui-ux-for-web-designers/)
- [20 HTML & CSS Pricing Tables](https://www.w3tweaks.com/css/html-and-css-pricing-tables/)
- [HTML Audio Player](https://www.w3tweaks.com/css/html-audio-player/)
- [Interactive Calendar App](https://www.w3tweaks.com/css/interactive-calendar-app/)
- [Interactive HTML5 Resume template](https://www.w3tweaks.com/css/interactive-html5-resume-template/)
- [47 jQuery Gallery plugins](https://www.w3tweaks.com/css/jquery-gallery-plugins/)
- [38 CSS Calendars](https://www.w3tweaks.com/css/list-css-calendars/)
- [29 Hand-Picked CSS Carousels](https://www.w3tweaks.com/css/list-css-carousels/)
- [43 Hand-Picked CSS Clocks](https://www.w3tweaks.com/css/list-css-clocks/)
- [76 Hand Picked CSS Music Players](https://www.w3tweaks.com/css/list-music-players/)
- [Mastering CSS Hover Effects With Demo](https://www.w3tweaks.com/css/mastering-css-hover-effects-with-demo/)
- [React and Redux Simple Multi-page Form](https://www.w3tweaks.com/css/react-and-redux-simple-multi-page-form/)
- [Simple calendar with notes panel](https://www.w3tweaks.com/css/simple-calendar-with-notes-panel/)
- [Simple Music Player with previous and next song options](https://www.w3tweaks.com/css/simple-music-player-with-previous-and-next-song-options/)
- [Smooth Wyre Payment Like loader using pure CSS](https://www.w3tweaks.com/css/smooth-wyre-payment-like-loader-using-pure-css/)
- [Tab switching using pure CSS](https://www.w3tweaks.com/css/tab-switching-using-pure-css/)

### JavaScript

- [4 Ways to Make an API Call in JavaScript](https://www.w3tweaks.com/javascript/4-ways-to-make-an-api-call-in-javascript/)
- [Build a Chatbot Widget with HTML, CSS & JavaScript](https://www.w3tweaks.com/javascript/add-chatbot-widget-website-html-css-javascript/)
- [Angularjs and JSON list infinite scroll](https://www.w3tweaks.com/javascript/angularjs-and-json-list-infinite-scroll/)
- [Angularjs - How to use or inject the custom filter in to Angular js controller?](https://www.w3tweaks.com/javascript/angularjs-how-to-use-or-inject-the-custom-filter-in-to-angular-js-controller/)
- [AngularJS with CanvasJS Charts](https://www.w3tweaks.com/javascript/angularjs-with-canvasjs-charts/)
- [Build an AI Color Palette Generator with JavaScript](https://www.w3tweaks.com/javascript/build-ai-color-palette-generator-javascript/)
- [9 D3.js Patterns & Templates](https://www.w3tweaks.com/javascript/d3-js-patterns-and-templates/)
- [Simple Dynamic Menus from JSON REST API using backbone.js](https://www.w3tweaks.com/javascript/dynamic-menus-from-json-rest-api-using-backbone-js/)
- [Enable and Disable drop down box using angularjs ngDisabled](https://www.w3tweaks.com/javascript/enable-and-disable-drop-down-box-using-angularjs-ng-disabled/)
- [Google ads in Angular js app](https://www.w3tweaks.com/javascript/google-ads-in-angular-js-app/)
- [Build a ChatGPT-Style Streaming Text Effect in JavaScript](https://www.w3tweaks.com/javascript/how-to-build-chatgpt-streaming-text-effect-javascript/)
- [Call the OpenAI API from Vanilla JavaScript (No Backend)](https://www.w3tweaks.com/javascript/how-to-call-openai-api-vanilla-javascript/)
- [Implement Internationalization (i18n) using Backbone.js and handlebars.js](https://www.w3tweaks.com/javascript/implement-internationalization-i18n-using-backbone-js-and-handlebars-js/)
- [Implementing Syntax Highlighter using Codemirror framework](https://www.w3tweaks.com/javascript/implementing-syntax-highlighter-using-codemirror-framework/)
- [Iterate javascript object keys using angularjs ngRepeat](https://www.w3tweaks.com/javascript/iterate-javascript-object-key-using-angularjs-ngrepeat/)
- [JavaScript Conditional Statements: A Guide to Writing Better Code](https://www.w3tweaks.com/javascript/javascript-conditional-statements/)
- [JavaScript Short Circuiting: What It Is and How To Use It](https://www.w3tweaks.com/javascript/javascript-short-circuiting-what-it-is-and-how-to-use-it/)
- [25 JavaScript String Methods](https://www.w3tweaks.com/javascript/javascript-string-methods/)
- [Web Speech API: Build a Voice Command UI in JavaScript](https://www.w3tweaks.com/javascript/javascript-web-speech-api-voice-command-ui/)
- [JavaScript Primitive and Non-Primitive Data Types](https://www.w3tweaks.com/javascript/js-primitive-and-non-primitive-data-types/)
- [Learn how to extract phone numbers from string in JavaScript](https://www.w3tweaks.com/javascript/learn-how-to-extract-phone-numbers-from-string-in-javascript/)
- [24 Most important JavaScript methods](https://www.w3tweaks.com/javascript/most-important-javascript-methods/)
- [Navigator.sendBeacon() is great method in JavaScript](https://www.w3tweaks.com/javascript/navigator-sendbeacon-method-in-javascript/)
- [null and undefined check in javascript](https://www.w3tweaks.com/javascript/null-and-undefined-check-in-javascript/)
- [Open Dynamic Youtube Videos in Fancybox or Modal window or Lightbox](https://www.w3tweaks.com/javascript/open-dynamic-youtube-videos-in-fancybox-or-modal-window-or-lightbox/)
- [Resize div box horizontally using jquery draggable](https://www.w3tweaks.com/javascript/resize-div-box-horizontally-using-jquery-draggable/)
- [Resize div box vertically using jquery draggable](https://www.w3tweaks.com/javascript/resize-div-box-vertically-using-jquery-draggable/)
- [Retrieving a List of YouTube Videos by Channel](https://www.w3tweaks.com/javascript/retrieving-youtube-videos-by-channel/)
- [Run AI Locally with Ollama and JavaScript](https://www.w3tweaks.com/javascript/run-ai-locally-ollama-javascript/)
- [Select all and Deselect all checkboxes in angularjs](https://www.w3tweaks.com/javascript/select-all-and-deselect-all-checkboxes-in-angularjs/)
- [Top javascript Array Methods with Examples](https://www.w3tweaks.com/javascript/top-javascript-array-methods-with-examples/)
- [Tryit Editor for HTML CSS JavaScript using CodeMirror](https://www.w3tweaks.com/javascript/tryit-editor-for-html-css-javascript-using-codemirror/)
- [Tutorial about how to Create Jobs portal using Indeed API](https://www.w3tweaks.com/javascript/tutorial-about-how-create-jobs-portal-using-indeed-api/)
- [Update and create the iframe element with content using JavaScript](https://www.w3tweaks.com/javascript/update-and-create-the-iframe-with-content-using-javascript/)

### HTML

- [The Benefits of Using Multi Step Forms in HTML](https://www.w3tweaks.com/html/benefits-of-using-multi-step-forms-in-html/)
- [6 Cool Things You Can Do With HTML](https://www.w3tweaks.com/html/cool-things-you-can-do-with-html/)
- [Chapter 2: How to create HTML files?](https://www.w3tweaks.com/html/how-to-create-html-files-and-how-to-run-the-html-pages-in-the-browsers/)
- [Chapter 3: List all HTML common file extensions of web pages](https://www.w3tweaks.com/html/html-file-extensions/)
- [HTML media tags](https://www.w3tweaks.com/html/html-media-tags/)
- [44 Free Multi Step HTML Forms](https://www.w3tweaks.com/html/multi-step-html-forms/)

### Guide

- [How to Add .Env to Gitignore?](https://www.w3tweaks.com/guide/add-env-to-gitignore-tutorial/)
- [Android WebView application Prompt | Android Studio](https://www.w3tweaks.com/guide/android-webview-application-prompt/)
- [How to Center iFrame Video in HTML?](https://www.w3tweaks.com/guide/center-iframe-video-in-html/)
- [How to Check if an Object Is Empty in Javascript](https://www.w3tweaks.com/guide/check-empty-object-javascript/)
- [How to Comment Out Multiple Lines in JavaScript](https://www.w3tweaks.com/guide/comment-multiple-lines-javascript/)
- [How to Compile SCSS to CSS: A Comprehensive Guide](https://www.w3tweaks.com/guide/compile-scss-to-css-a-comprehensive-guide/)
- [How to Convert String to Date in Javascript in dd-mmm-yyyy Format](https://www.w3tweaks.com/guide/convert-string-to-date-in-javascript/)
- [What Is the Correct CSS Syntax for Making All the P Elements Bold?](https://www.w3tweaks.com/guide/css-syntax-for-making-all-the-p-elements-bold/)
- [What is the difference between www and W3C?](https://www.w3tweaks.com/guide/difference-between-www-and-w3c/)
- [GitHub Copilot vs Claude vs ChatGPT: Which Writes Better CSS?](https://www.w3tweaks.com/guide/github-copilot-vs-claude-vs-chatgpt-css/)
- [Go Developer Roadmap 2020](https://www.w3tweaks.com/guide/go-developer-roadmap-2020/)
- [How to Create a Basic HTML Document: A Step-by-Step Guide](https://www.w3tweaks.com/guide/how-to-create-a-basic-html-document/)
- [How to declare variables in JavaScript?](https://www.w3tweaks.com/guide/how-to-declare-variables-in-javascript/)
- [How to Disable Javascript in Tor](https://www.w3tweaks.com/guide/how-to-disable-javascript-in-tor/)
- [How to Install Bootstrap CSS on a Website](https://www.w3tweaks.com/guide/how-to-install-bootstrap-css-on-a-website/)
- [How to Make a Square in CSS?](https://www.w3tweaks.com/guide/how-to-make-a-square-in-css/)
- [How to Override Bootstrap CSS](https://www.w3tweaks.com/guide/how-to-override-bootstrap-css/)
- [How to Read a CSV File in JavaScript](https://www.w3tweaks.com/guide/how-to-read-a-csv-file-in-javascript/)
- [How to Select & Style Multiple Classes in CSS Explained?](https://www.w3tweaks.com/guide/how-to-select-multiple-classes-in-css/)
- [How to Separate Cards Stuck Together in CSS?](https://www.w3tweaks.com/guide/how-to-separate-cards-stuck-together-in-css/)
- [How to create a sticky header in CSS and JavaScript?](https://www.w3tweaks.com/guide/how-to-sticky-headers-html-css-javascript/)
- [How to write a function in JavaScript?](https://www.w3tweaks.com/guide/how-to-write-a-function-in-javascript/)
- [Does Internet Explorer 10 Support HTML5?](https://www.w3tweaks.com/guide/ie10-html5-support-compatibility/)
- [Why Multi Page Form HTML is Better than Single Page Forms](https://www.w3tweaks.com/guide/multi-page-form-html-better-than-single-page/)
- [How to Play Tic Tac Toe (TTT) Without CSS: A Simple Guide](https://www.w3tweaks.com/guide/play-tic-tac-toe-without-css-a-simple-guide/)
- [How to Position an Image in CSS?](https://www.w3tweaks.com/guide/positioning-images-in-css-guide/)
- [Prompt Engineering for Frontend Developers](https://www.w3tweaks.com/guide/prompt-engineering-frontend-developers/)
- [Re-sign an Android APK Manually for an application](https://www.w3tweaks.com/guide/re-sign-an-android-apk-manually-for-an-application/)
- [Search YouTube Videos using YouTube V3 API using Jquery Ajax call](https://www.w3tweaks.com/guide/search-youtube-videos-using-youtube-v3-api-using-jquery-ajax-call/)
- [What Does $ Mean in Javascript?](https://www.w3tweaks.com/guide/what-does-dollar-mean-in-javascript/)
- [YouTube API autocomplete search suggestion using Jquery JSON request](https://www.w3tweaks.com/guide/youtube-api-autocomplete-search-suggestion-using-jquery-json-request/)

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## Archived categories

- https://www.w3tweaks.com/php/ — older content, no longer actively maintained