A rather geeky/technical weblog, est. 2001, by Bramus
view-transitions-toolkit, a collection of utility functions to more easily work with View Transitions.
In my work with View Transitions over the last several years, I’ve published everything from deep-dive articles, demos, and announcement videos at Google I/O. I’ve also done some more experimental things with it, such as optimizing the keyframes or driving a View Transition by scroll.
To turn the lessons from these scattered experiments into something more reusable for both you and me, I’ve bundled the most frequent code patterns into a dedicated package: view-transitions-toolkit.
view-transitions-mock: A non-visual Polyfill for Same-Document View Transitions
View Transitions are a powerful Modern Web feature allow for smooth seamless animated transitions two between different states of a web page. They can make for a much more pleasant user experience, but as with any new web platform feature, browser support is not yet fully universal so you need to add some fallback logic to your code.
view-transitions-mock bridges that gap. It is a spec-compliant JavaScript implementation of Same-Document View Transitions that polyfills the entire JavaScript API surface of the spec, but that doesn’t do the animation bits.
Beware when manipulating the coordinates of the View Transition’s ::view-transition-group(*) pseudo. Depending on where you read those coordinates from, you might end up with layout jumps when writing them back. This post details the pitfalls and how to deal with them, unlocking more performant animations on the ::view-transition-group() pseudo along the way.
StyleObserver: Element.matchContainer()
Martin Winkler published a package that polyfills Element.matchContainer to get notified in script when a Container Query matches/unmatches. Under the hood, it uses a StyleObserver.
moveBefore
Unlike the classic way of moving a node by removing+reinserting it, the moveBefore method preserves the element’s state!
By calling getBoundingClientRect before and after the snaphots are taken, you can get the before and after positions of the transtioned elements.
Can you Syntax Highlight a code snippet on the web without overloading the DOM with a ton of <span> elements wrapped around the tokens? Thanks to the Custom Highlight API, you can!
With a little bit of JavaScript, you can control 3D models and videos using Scroll-Driven Animations
