How do you use web security features, and what gets in your way? ’ The W3C Security Web Application Guidelines Community Group wants your input to improve guidance for developers.Take the survey’https: docs.google.com forms d 1-8DvgiB3AqrFU7tqe0GCoQsh6lfdOHHnUldOzMrtmeQ viewform?pli 1&pli...

   The URL Pattern API is Newly Available Use it to match and extract parts of URLs, no need to reinvent routing logic. Supports literals, wildcards, named groups, and even regex constraints.Learn how it works https: developer.mozilla.org en-US docs Web API URL Pattern API

   What's new in Firefox 145? CSS: text-autospace’ better spacing across scripts math font family’ proper math renderingJS: Atomics.waitAsync()’ async synchronization on the main threadThere's more Read full release notes https: developer.mozilla.org en-US docs Mozilla Firefox Releases 145

   Ever seen proto in JavaScript and thought nothing of it? ’ You might be opening the door to prototype pollution - a sneaky vulnerability that lets attackers modify built-in objects like Object.prototype Learn how in this guide by openwebdocs https: developer.mozilla.org en-US docs Web Security...

   Which image format really gives you the best balance between speed, size, and quality? In this hands-on MDN post, Polina Gurtovaia runs real compression experiments (AVIF vs. JPEG ) and breaks down how to pick the right codec for your workflow.https: developer.mozilla.org en-US blog image-formats...

   Firefox 145 is here for web developers Highlights include: text-autospace for smoother typography math generic font family Atomics.waitAsync() for async thread sync Integrity-Policy headers for subresource integritySee what’s new https: developer.mozilla.org en-US docs Mozilla Firefox Releases 145

   Ever wish HTTP status codes were easier to remember? Check out this MDN cheatsheet that pairs each status code with an emoji to help you visualize what each one means, from 200 OK ✠to 418 I’m a teapot Check it out

   Your supply chain is only as strong as its weakest dependency.From securing build tools to verifying external scripts, this new MDN guide contributed by openwebdocs walks you through practical steps to protect your web projects from supply chain attacks.Read the guide https: developer.mozilla.org...

   ’ Want seamless page-to-page animations no JS required?The new CSS view-transition at-rule makes it possible ✠Works in Chrome, Edge, Safari Coming soon to Firefox 144 ’ Perfect for progressive enhancementGet started https: developer.mozilla.org en-US blog view-transitions-beginner-guide

   New changes in default UA styles for <h1> in <section> <article> <nav> & <aside> No implicit <h1> styles based on surroundings A <h1> will always look like a <h1> Lighthouse will flag missing font-size on <h1> in <section>s, etcRead...

   MDN is more than just a resource. It's a community of developers, contributors, and learners passionate about web development. Contribute to, s MDN documentation Help other devs ’ Localize content Review or write on MDNStart now https: developer.mozilla.org en-US community

   Margin? Border? Padding? Content? ’ The CSS box model is the foundation of layout, and MDN’s interactive exercises help you truly understand how it all fits together. ’ Practice live in your browserhttps: developer.mozilla.org en-US docs Learn web development Core Styling basics Test your skills...

   This is the web you know and build on. A great visual by HeyNina101 from SketechWorld, covering HTML & CSS to TCP & TLS - the core layers that keep everything running.

   Your supply chain is only as strong as its weakest dependency.From securing build tools to verifying external scripts, this new MDN guide contributed by openwebdocs walks you through practical steps to protect your web projects from supply chain attacks.Read the guide https: developer.mozilla.org...

   ✠One line of CSS. Smooth page transitions. No JavaScript. view-transition navigation: auto; The CSS View Transitions bring native animations to multi-page apps, no SPA setup needed Explore now https: developer.mozilla.org en-US blog view-transitions-beginner-guide

   Don’t fear the terminal, embrace it Get comfortable with the command line and learn,✠How to open your terminal✠Common commands like cd, ls, and mkdir✠How to create, move, and delete files and foldersGet the cheat sheet https: developer.mozilla.org en-US docs Learn web development Getting...

   ✠Meet Shrinivass, a Sr Full Stack Engineer from USA, contributing for over a year improving docs like :has() and DOMContentLoaded.He says, I contribute because it’s mentorship at scale. Each improvement helps thousands of devs. Huge thanks https: developer.mozilla.org en-US community spotlight...

   Ever seen proto in JavaScript and thought nothing of it? ’ You might be opening the door to prototype pollution - a sneaky vulnerability that lets attackers modify built-in objects like Object.prototype .Learn how it works in this amazing guide written by openwebdocs https: developer.mozilla.org en...

   ✠Meet Shrinivass, a Sr Full Stack Engineer from USA, contributing for over a year improving docs like :has() and DOMContentLoaded.He says, I contribute because it’s mentorship at scale. Each improvement helps thousands of devs. Huge thanks https: developer.mozilla.org en-US community spotlight...

   ✠Newly Available: CookieChangeEventIt lets you respond to cookie changes as they happen, using modern event-driven logic in your app or service worker. The event is fired when cookies are added, changed, or deleted.Try now https: developer.mozilla.org en-US docs Web API CookieChangeEvent...