I've now filed (or commented on existing) standards position requests from other browser vendors (WebKit & Mozilla) and the W3C TAG for the #CrossOriginStorage API: * Mozilla: github.com/mozilla/stan... * WebKit: github.com/WebKit/stand... 🆕 * W3C TAG: github.com/w3ctag/desig... 🆕

Cross-Origin Storage (COS) · Issue #1427 · mozilla/standards-positions

Specification title Cross-Origin Storage (COS) Specification or proposal URL (if available) No response Explainer URL (if available) https://github.com/WICG/cross-origin-storage/ Proposal author(s)...

github.com

If you're interested in the Cross-Origin Storage API, I just created a new Bluesky feed, check it out and pin it if you like it: bsky.app/profile/did:... #CrossOriginStorage

I was once again a guest on the German-speaking 🇩🇪 @workingdraft.de podcast 🎙️ to talk about the Cross-Origin Storage API: workingdraft.de/723/. thoroughly enjoyed chatting about this exciting API proposal with @schepp.dev and @sirpepe.bsky.social. Track #CrossOriginStorage for more.

Revision 723: Cross-Origin Storage API – Caching über Origins hinweg, mit Thomas Steiner | Working Draft

Wir sprechen mit Thomas Steiner (Mastodon, Bluesky, LinkedIn) von Google über einen neuen Vorschlag für die Webplattform: die Cross-Origin-Storage API. Tom war bereits mehrfach bei uns zu Gast, zuletz...

workingdraft.de

Cross-Origin Storage API: stop downloading twice. @morello.dev explains a proposed standard that stores large files by their SHA-256 hash, so origins share one device cache instead of downloading duplicates. #performance #browser morello.dev/blog/cro...

Nice to see this being worked on 🤩 You can already use `<input type="checkbox" switch>` today BTW, thanks to this polyfill by my colleague @tomayac.com: github.com/tomayac/inpu...

GitHub - tomayac/input-switch-polyfill: A polyfill for <input type="checkbox" switch>

A polyfill for <input type="checkbox" switch>. Contribute to tomayac/input-switch-polyfill development by creating an account on GitHub.

github.com

IntentToShip@intenttoship.dev · 2w ago

Blink: Intent to Prototype: <input type="checkbox" switch>

Cross-Origin Storage API: Stop Downloading Twice: dev.to/morellodev/c.... A great overview of our proposal for the #CrossOriginStorage API by Dennis Morello. 👏

Cross-Origin Storage API: Stop Downloading Twice

The Cross-Origin Storage API lets sites share one cached copy of a file (a JS library, font, or AI model) across origins by SHA-256 hash. Here's how it works.

dev.to

Integrating Vite PWA Inspector with @vite.dev devtools, the inspector can run also as a seperated middleware (ala vite-plugin-inspect or UnoCSS inspector). @tomayac.com #PWA

Started an Awesome Cross-Origin Storage list: github.com/tomayac/awes... . Transformers.js, WebLLM, wllama, Flutter, Emscripten, Nuxt and Vite plugins, and a bunch of demos… #Awesome #CrossOriginStorage

GitHub - tomayac/awesome-cross-origin-storage: A curated list of resources for the Cross-Origin Storage (COS) API

A curated list of resources for the Cross-Origin Storage (COS) API - tomayac/awesome-cross-origin-storage

github.com

👀 Look, ma! The Cross-Origin Storage extension running on Firefox! If you dare, install it via `about:debugging` from github.com/web-ai-commu.... Else, just wait for it to be approved on the Firefox Add-on Store. More background on #CrossOriginStorage: github.com/WICG/cross-o....

Really great questions and comments on @danielroe.dev's posts on Nuxt's experiments with the Cross-Origin Storage API (github.com/WICG/cross-o...): 🐘 Mastodon: mastodon.roe.dev/@daniel/1168... 🦋 Bluesky: bsky.app/profile/dani... 💼 LinkedIn: www.linkedin.com/posts/daniel...

GitHub - WICG/cross-origin-storage: Explainer for the Cross-Origin Storage (COS) API

Explainer for the Cross-Origin Storage (COS) API. Contribute to WICG/cross-origin-storage development by creating an account on GitHub.

github.com

danielroe@danielroe.dev · last mo.

wouldn't it be nice if sites could share a cache of common js? ... stuff like react, or vue or svelte? 👉 there's an early stage proposal for cross-origin storage which enables exactly this. there are challenges but I think it's very interesting indeed

right now testing it out means: ⚪ using the vite plugin or nuxt module ⚪ installing an 'unpacked' version of a chrome extension that polyfills this functionality ⚪ checking to see if your site still builds, and ideally comparing output _across_ several sites

Cross-Origin Storage - Chrome Web Store

Implements the proposed Cross-Origin Storage API, letting sites share files with your consent for a faster and more efficient web.

chromewebstore.google.com

I'm working with @tomayac.com to build bundler integration for this (currently a nuxt module + a vite plugin) I'd love to know: 1️⃣ if this sounds like a good idea you'd use 2️⃣ if you wanted to test it out and see if it might make a difference for you ... happy to help if you have questions! 🙏

GitHub - danielroe/cross-origin-storage: Load shared dependencies from Cross-Origin Storage (COS).

Load shared dependencies from Cross-Origin Storage (COS). - danielroe/cross-origin-storage

github.com

wouldn't it be nice if sites could share a cache of common js? ... stuff like react, or vue or svelte? 👉 there's an early stage proposal for cross-origin storage which enables exactly this. there are challenges but I think it's very interesting indeed

GitHub - WICG/cross-origin-storage: Explainer for the Cross-Origin Storage (COS) API

Explainer for the Cross-Origin Storage (COS) API. Contribute to WICG/cross-origin-storage development by creating an account on GitHub.

github.com

Meet Google DevRel Engineer @tomayac.com, who specializes in Web AI and WebAssembly. At #GoogleIOConnect Berlin, Thomas will focus on helping developers build privacy-first, on-device AI web apps natively in the browser, entirely client-side and with zero API keys required.

@tomayac.com colaborated with us on implementing the Cross-Origin Storage API in Transformers.js. Read his blogpost to learn how to try out the API right now🤗

Thomas Steiner@tomayac.com · last mo.

Very excited to share a guest post I wrote for the Hugging Face 🤗 blog! Experimenting with the proposed Cross-Origin Storage API in Transformers.js! 👉 huggingface.co/blog/cross-o... This proposed API has the potential of revolutionizing the Web—a little bit. Learn more: github.com/WICG/cross-o...!

Emscripten 6.0.1 is out! 🚀 github.com/emscripten-c... Includes support for Rust's wasm-bindgen, and the new Cross-Origin Storage browser API. Also we are now using Github releases (as in the link here)

Release 6.0.1 · emscripten-core/emscripten

What's Changed The ability to redirect JS compiler stderr using EMCC_STDERR_FILE was removed. These days you can use EMCC_DEBUG and/or EMCC_DEBUG_SAVE to preserve all the intermediate JS compiler...

github.com

Very excited to share a guest post I wrote for the Hugging Face 🤗 blog! Experimenting with the proposed Cross-Origin Storage API in Transformers.js! 👉 huggingface.co/blog/cross-o... This proposed API has the potential of revolutionizing the Web—a little bit. Learn more: github.com/WICG/cross-o...!

Experimenting with the proposed Cross-Origin Storage API in Transformers.js

We’re on a journey to advance and democratize artificial intelligence through open source and open science.

huggingface.co

I'm in the #Emscripten release notes: github.com/emscripten-c.... New experimental `-sCROSS_ORIGIN_STORAGE` linker flag integrating the proposed Cross-Origin Storage Web API (github.com/WICG/cross-o...) as a progressive enhancement for #Wasm loading on the Web target: emscripten.org/docs/compili....

Release 6.0.1 · emscripten-core/emscripten

What's Changed The ability to redirect JS compiler stderr using EMCC_STDERR_FILE was removed. These days you can use EMCC_DEBUG and/or EMCC_DEBUG_SAVE to preserve all the intermediate JS compiler...

github.com

The one and only @danielroe.dev hacking Cross-Origin Storage (github.com/WICG/cross-origin-storage) support into @nuxt.com. Still loads to do, but a proof of concept works, which means in the future each Nuxt app could share its copy of @vuejs.org with each other Nuxt app. "This is very doable." 🤩

i’m really interested in this proposal 👀 anyone interested in testing it in their sites to see the potential savings?

Thomas Steiner@tomayac.com · 2mo ago

The one and only @danielroe.dev hacking Cross-Origin Storage (github.com/WICG/cross-origin-storage) support into @nuxt.com. Still loads to do, but a proof of concept works, which means in the future each Nuxt app could share its copy of @vuejs.org with each other Nuxt app. "This is very doable." 🤩

The one and only @danielroe.dev hacking Cross-Origin Storage (github.com/WICG/cross-origin-storage) support into @nuxt.com. Still loads to do, but a proof of concept works, which means in the future each Nuxt app could share its copy of @vuejs.org with each other Nuxt app. "This is very doable." 🤩

🎧 Your MP3s from Google Drive in Music Assistant on Home Assistant: blog.tomayac.com/2026/05/30/y.... This blog post describes how to connect Google Drive to #MusicAssistant on #HomeAssistant.

Your MP3s from Google Drive in Music Assistant on Home Assistant

The personal blog of Thomas Steiner

blog.tomayac.com

🎧 Your MP3s from Google Drive in Music Assistant on Home Assistant: blog.tomayac.com/2026/05/30/y.... This blog post describes how to connect Google Drive to #MusicAssistant on #HomeAssistant.

Your MP3s from Google Drive in Music Assistant on Home Assistant

The personal blog of Thomas Steiner

blog.tomayac.com

@tomayac.com 's I/O talk has some great ideas for incorporating AI features into a web app, using the Built-in AI APIs. I'll definitely steal some of those ideas and put them in the admin interface for my personal blog Watch the talk here: www.youtube.com/watch?v=ddBx... #WebAI #BuiltinAI

Build new features using built-in AI in Chrome

YouTube video by Chrome for Developers

youtube.com

The resources from my #GoogleIO talk "Build new features using built-in Al in Chrome": 👉 goo.gle/trailblazers (the trailblazers travel blog used as the running example during the talk) 👉 goo.gle/starter-exte... (the Eleventy blog template with editor you can use) 👉 goo.gle/built-in-ai-... (the docs)

An experimental polyfill for the Prompt API: developer.chrome.com/docs/ai/prom.... Uses Transformers.js w/ Gemma 3 1B when the Prompt API isn't supported, but you can also use cloud backends (or other models). ```js if (!('LanguageModel' in self)) { await import('prompt-api-polyfill.js'); } ```

An experimental polyfill for the Prompt API  |  AI on Chrome  |  Chrome for Developers

Learn how to use the Prompt API on unsupported platforms or browsers with an experimental polyfill.

developer.chrome.com

Learn more about the built-in Translator API that you can use in Chrome since version 138: www.youtube.com/shorts/PCQhS....

Translator API: on-device translation made easy

YouTube video by Chrome for Developers

youtube.com

After reviewing the custom build strategy at workbox-build fork, I have dual SW working at @vite.dev VanillaJS example with a custom pwa plugin 🎉: @tomayac.com @jeff.posnick.org #pwa

Great practical example of how @tomayac.com integrated the Language Detector and Translator APIs into the popular Mastodon client elk.zone. 👇 www.youtube.com/watch?v=-l2B... PR: github.com/elk-zone/elk...

Built-in AI: how Mastodon uses translation APIs

YouTube video by Chrome for Developers

youtube.com

The W3C Web Machine Learning Working Group is working on proposals for several built-in AI writing tools within browsers. These tools will translate, detect languages and proofread text without relying on third-party models. ✍️ The draft specifications 👇 webmachinelearning.github.io/incubations/