If you sense a joyous exhale, that’s Team CodePen in crossing this launch milestone for the most ambitious professional project any of us has ever achieved. Today, we declare CodePen 2.0 officially launched. We do it, naturally, for you, as we set out to rebuild our online editor to better support what today’s developers want…
The writing-mode CSS property sets whether lines of text are laid out horizontally or vertically, and the direction in which blocks and lines progress. .element { writing-mode: vertical-rl; } This is most useful in languages such as Chinese, Japanese or Korean where the text is often set vertically. In the English language, it’s more likely…
While React Server Components rely on the custom Flight protocol to stream interactive UIs, this same mechanism introduces powerful deserialization sinks that attackers can exploit. Durgesh Pawar breaks down the mechanics behind the CVSS 10.0 “React2Shell” vulnerability to show how protocol manipulation can lead to remote code execution. It also covers a practical, ranked set…
I like how Alan questions something nearly all of us take for granted: What if We Used Proportional Fonts for Code Blocks? And he kinda leaves it at that. What if. Lots of text is almost certainly easier to read in a non-monospace font, but is lots of code easier to read? And spaces/tabs are…
The pointer-events property controls whether an element can become the target of pointer events like clicks, hover states, and other pointer-based events. In other words, it lets you decide whether the browser should treat an element as interactive when the pointer is over it. .no-pointer-events { pointer-events: none; } CodePen Embed Fallback To understand how…
The common rule of thumb is to never “block” the browser’s main thread when running JavaScript tasks. But is this a hard rule? Victor Ayomipo describes a use case he encountered involving a screenshot extension where he made an exception to the rule and decided that blocking the main thread was absolutely the right thing…
Marie and Chris hop on CodePen Radio for a little chat on how we’re still happily using WordPress for a variety of things here on CodePen. We’ve got it hosted on a subdomain and on a different (WordPress-specific) hosting plan than our main monorepo, so it has its own deployment process and such. We use…
Similar to last time, What’s !important #15 is pretty stacked — read all about boundary-aware CSS, making grid lanes accessible, creating time-based web designs, fixing full-bleed CSS, improving customizable , new web platform features, and more. Using view() for boundary-aware CSS Preethi Sam very expertly walked us through the concept of boundary-aware CSS. Using view(),…
Many companies assume everyone craves new AI features. But the reality is that most people don’t want more AI — at least not in the way most AI leaders envision it. Brought to you by Design Patterns For AI Interfaces, friendly video courses on UX and design patterns by Vitaly. Many companies silently assume that…
I’ve been doing computers for a good minute, but the Scroll Lock key still predates me. There may have been a day when I could have explained what it does, but that knowledge had evaporated until I read Marcin Wichary’s Lock Scroll With a Vengeance. It’s fascinating that the technology that deprecates the Scroll Lock…