iiinova — where your digital self keeps evolving

Michal Mocny @mmocny.com · 03/12/2025

I don't get it... Is this uncommon?

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Michal Mocny @mmocny.com · 25/11/2025

Yeah I think 2026 will be an exciting opportunity. I think individual sites or nimble RUM tools will be able to move fastest here, but we're slowly trying to gather data for CrUX. Not sure how much interest there is for that?

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Michal Mocny @mmocny.com · 24/11/2025

One caveat-- those are averages across a large range of sites, some of which are popular but only minimally use the soft navs pattern, not full spa. Many sites-- esp sticky sites-- will have higher ratios. But these are a minority of the overall.

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Michal Mocny @mmocny.com · 07/11/2025

My recording from @perfnow.nl is now up on YouTube: www.youtube.com/watch?v=sDHS... I was a bit nervous, and very tired, but I think it went okay.

youtube.com

Measuring Interactions and Navigations - Michal Mocny - performance.now() 2025

YouTube video by Web Conferences Amsterdam

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Michal Mocny @mmocny.com · 06/11/2025

Japanese tourism sign says "please refrain from any acts of nuisance" and my whole life philosophy is shattered...

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Michal Mocny @mmocny.com · 02/11/2025

I couldn't find a metric for "turn off js" but I'm sure its trivial. More useful would be "desired JS didn't have a chance to run" but that's much harder to define. We won't have single perfect number for that. But I'll see if I can get some insights on Monday.

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Michal Mocny @mmocny.com · 01/11/2025

Ah neat. This answers the question I had last night. Interesting stuff this signal graph...

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Michal Mocny @mmocny.com · 01/11/2025

Another wonderful @perfnow.nl conference has flown by. Love this community, and I return energised with ideas and motivation. Well, mostly energised...

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Michal Mocny @mmocny.com · 16/10/2025

As we already have framework app templates and create-blank-app in code editors, we will have whole framework-version-specific context hooks as well. My 2cents: It's not really what LLMs could do, its: why might developers choose to specifically constrain LLMs to a specific tech stack?

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Michal Mocny @mmocny.com · 16/10/2025

As we evolve to develop new APIs or new idioms, there is a bootstrapping & training problem, no doubt, but this is where agents/context engineering plays a role. Sure, if I just ask a chatbot to hallucinate a demo it might pick a random popular option-- but I could also frame my requirements.

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Michal Mocny @mmocny.com · 16/10/2025

I think I disagree with the premise here. I think that LLMS only need *sufficient* context to become good at writing in particular style, not necessarily *the most& context. Like humans, LLMS can become expert developers at many frameworks regardless of which is most popular in the training set.

Michal Mocny @mmocny.com · 08/10/2025

<activity/> is sweet. Seems there are two use cases in particular (right from the docs) - prerendering hidden new content - Keep rendering hidden old content Pre-re-rendering you might say :)

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Michal Mocny @mmocny.com · 08/10/2025

React 19.2 update and the react conf content from yesterday has been great. I enjoy seeing the references to INP on guiding a lot of the performance and scheduling/coordination work, and the nice integration with modern web features. Exciting stuff every year.

Michal Mocny @mmocny.com · 08/05/2025

(Ah. Astro+VT used to be coupled with ClientRouter, but afaik has been de-coupled. I assumed you mentioned cross-document-VT, which are also now supported.) HTML swap I think is default, but you can opt to persist nodes (component islands, or dom nodes with state). The default might change...

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Michal Mocny @mmocny.com · 08/05/2025

@danabra.mov I've been enjoying your recent posts on RSC. Re the astro post: overreacted.io/rsc-for-astr... I don't see mention of <ClientRouter> which both changes some of comparison, and, I think, validates the RSC model. docs.astro.build/en/guides/vi... Have you looked at that? Very htmx-ish.

overreacted.io

RSC for Astro Developers — overreacted

Islands, but make it fractal.

Michal Mocny @mmocny.com · 26/04/2025

m.xkcd.com does some of these things already. Unfortunate that you don't get redirected, automatically.

m.xkcd.com

xkcd: PhD Timeline

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Michal Mocny @mmocny.com · 08/04/2025

Naming aside, that presentation was exceptional. It put into clear terms patterns we were struggling to articulate.

Michal Mocny @mmocny.com · 08/04/2025

A wild Michal appears!

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Michal Mocny @mmocny.com · 03/03/2025

Your last question in this episode, with an explicit call to "be specific", was about the nicest "I call bullshit" I've ever heard ;)

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Michal Mocny @mmocny.com · 20/02/2025

Darned. Sorry to hear that. You are the second person this week who I've heard this happen to. Where are these slopes?

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Michal Mocny @mmocny.com · 12/02/2025

That's not dodgy. You should see me try overhangs!

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Michal Mocny @mmocny.com · 22/01/2025

That's actually genius! Until you forget to turn it off while on a roaming hotspot :)

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Michal Mocny @mmocny.com · 13/12/2024

But now you have to undo on error or if user changes their mind... Or maybe optimistic + route changes are a bad idea and you should only use it for simpler things?

Michal Mocny @mmocny.com · 13/12/2024

What happens when you mix: - transition to a new state - route change at new state - useOptimistic (eager state update) In most of the guidance for transitions they recommended integrating route changes after successful render, not at start. I think useOptimistic means eager URL update?

Michal Mocny @mmocny.com · 13/12/2024

Ricky, I've been left in <Suspense>. I could really use() an answer! Could you kindly route() me, so I can start to Transition? I eagerly await your Promise to resolve my query. Please don't reject. (Why yes, I am dad joke levels of vibe today :)

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I, too, often feel this way when measuring event timing ;)

"Any sufficiently advanced technology is indistinguishable from magic." Therefore, you are obviously a magician.

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Right above, in the same post. form actions and useActionState examples.

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Very cool! Now-- how much AI did you leverage to create this? ;)

YouTube video by Saturday Night Live

Whenever anyone on here call a post a "skeet" I cannot help but think of this: youtu.be/3sxRAeh8f7w?...

youtu.be

Rap Roundtable - SNL

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The library for web and native user interfaces

Nice. Q: In the v9 post on useOptimistic (react.dev/blog/2024/12...) you don't show redirect("/path"); (like other examples) Other examples: - Submit + transition - Go to network - On success, redirect() - Re-render useOptimistic: - Re-render - Go to network Redirect when? Fallback from error?

react.dev

React v19 – React

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Michal Mocny @mmocny.com · 10/12/2024

This looks so incredible. Could you share the dish name? (and restaurant, assuming/hoping I can visit that geo in the future)