Page Transitions - I Love It!

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Scott tolinsky has been dreaming of this for over four or five years now. This is in chrome canary, under a flag actaly it might even be a normal chrome under a flag. You just copy this little snippet that we have, which is a path to the flag. Ncrom, you can pace this into your r el bar, and will take you right to it. It allows you to use and enable the document transition API.

In this Hasty Treat, Scott and Wes talk about the new Browser CSS Page Transitions API proposal and what features it opens up for developers on the web.

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Show Notes

WICG Shared Element Transitions
00:21 Welcome
01:33 Sponsor: Prismic
02:43 Sponsor: LogRocket
04:18 Browser animations on the web vs native apps
06:15 What is the targeted use case for it?
06:56 Shared Element to Root Transitions
11:14 Entry and Exit
17:33 How to enable this in Chrome
Example Code
Shared Element Transition history
Sarah Drasner’s demo

async function doTransition() { let transition = document.createDocumentTransition(); // Specify offered elements. The tag below is used to refer // to the generated pseudo elemends in script/CSS. document.querySelector(".old-message").style.pageTransitionTag = "message"; // The start() call triggers an async operation to capture // snapshots for the offered elements, await transition.start(async () => { // This callback is invoked by the browser when the capture // finishes and the DOM can be switched to the new state. // No frames are rendered until this callback returns. // Asynchronously load the new page. await coolFramework.changeTheDOMToPageB(); // Clear the old message if that element is still in the page document.querySelector(".old-message").style.pageTransitionTag = ""; // Set new message as the shared element 'message' document.querySelector(".new-message").style.pageTransitionTag = "message"; // Set up animations using WA-API on the next frame. requestAnimationFrame(() => { document.documentElement.animate(keyframes, { ...animationOptions, pseudoElement: "::page-transition-container(message)", }); }); // Note that when this callback finishes, the animations will start with the tagged elements. }); } Tweet us your tasty treats