Experienced teams are good at estimating the median of how long tasks will take, but it's a log-normal probability distribution. What you want to use for sprint planning (for tickets to average out) is probably the mean, which is 1.6x the median (i.e. 1.6x the estimate) in this distribution. (1/2)

honestly astonished that anyone still uses axios in 2026. fetch made it into all major browsers *nine years ago*. eleven if you don't count safari!

CSS nesting is now Baseline 🎉 Write nested selectors directly in CSS — just like Sass, but natively. .card { color: black; &:hover { color: blue; } .title { font-weight: bold; } } No preprocessor needed. Learn more 👇 developer.mozilla.org/en-US/docs/...

Ariel's post pushed me to finally finish "Why Mastro?" Does the more personal tone work? "Over the last decade, the JavaScript ecosystem has been moving to ever more complex frameworks and build systems. What prompted me to create Mastro is that a lot of that isn’t necessary anymore."

♛ Brilliant. Kyle Van Deusen’s two-layer approach to managing color on your project solves problems you might not even know you have yet. theadminbar.com/semantics-an...  #ProductDesign #ProductDevelopment #webdevelopment #designsystems #color #palettes #primitives

I disagree with blaming full-stack eng. But this definitely resonated: "It isn’t about awareness. It’s about who’s writing the front-end code, and whether they’re qualified to write it. [frontend skills] require years of focused attention. They require someone whose job it is to care about them"

Those bang queries are great, but even faster is adding npmx search to the address bar in Firefox (via right click once) with a keyword (e.g. "@n"). Firefox also supports type ahead and search suggestions from npmx.dev this way. Other browsers will likely offer similar mechanisms (not tested).

Revolution or evolution? Switch ecosystem or incrementally evolve an existing one? The former needs to be 10x as good to justify switching. The latter always needs to go through adjacent possibles: newsletter.squishy.computer/p/evolution-...

Deno was always a tough business case. It's a pity, as Deno Deploy seemed quite nice to use last time I tried it. I still use the deno runtime because with Node/Bun: - I always forget to run `pnpm/bun install` - I hate upgrading packages likes TypeScript and linters

🤗 developer.mozilla.org/en-US/docs/W...

This prompted me to change the first sentence to "Mastro is a minimal tool for people that care." Does that resonate with you? Or should we be more explicit, like "for people that care about their users and the web"? 🤔

You might not need WebSockets! Server-sent events (SSE) is a simple and decades-old format to stream JSON over HTTP. And since today, Mastro has not only a `htmlResponse` and `jsonResponse` helper, but also `sseResponse`. These are all tiny wrappers around the web standard Response object btw.

Using CSS variables for z-index values! 🤯

Node.js is moving to one major release per year starting with Node 27! 🚀 ✅ Simpler: Every release becomes LTS. ✅ Predictable: Version numbers now align with the year. ✅ New: A 6-month Alpha channel for early testing. https://bit.ly/4rnosLg

Remember Service Workers? What's the right way to think about them in 2026? Are they HTTP proxies, offline-capable web apps, or free frontend servers? New post: mastrojs.github.io/blog/2026-03...

Whilst watching @kevinpowell.co's 1M sub stream today, and he made this statement that caught my attention: 📌 Javascript's possible reduced role in 1-2 yrs, thanks to CSS's attr() function. developer.mozilla.org/en-US/docs/W... Thoughts? You can watch the stream here: www.youtube.com/live/e5JY5Kz...

First Astro, then 11ty… congrats to Zach for finding a (hopefully) sustainable home! The idea with Mastro though is to keep the core so simple and minimal that it doesn’t require a lot of maintenance.

@jasnell.me's blog post on streams made me finally add a buffer in Mastro's HTML streaming implementation. This greatly reduces the number of chunks in the async iterable. Because there is a lot of per-chunk overhead, this brings our benchmark down from 25µs to 10µs 🚀 github.com/mastrojs/mas...

Oh, cool! The Docs tab in @jsr.io now defaults to the default export (previously it was "all symbols", which got sometimes cluttered). jsr.io/@mastrojs/ma...

software is ultimately a sociocultural object, not a pile of code, not a tool like a hammer

Unfortunately, JavaScript/TypeScript has no built in type Result<T> = T | Err. There seems to be no widely used library (like Bluebird was for Promises before standardization)? What are you people using? Perhaps `type Result` in standardschema.dev might be our best chance to get there?

"there’s always some layer of abstraction. [...] But when it comes to front-end development, that line is for me to stay as close as I can to raw HTML, CSS, and JavaScript. After all, that’s what users are going to get in their browsers."

📕 Stop Using and Recommending React 👉🏻 The author used React for a long time and explains that there is no reason to use it and a lot of reasons against it. 👉🏻 He mentions Vue, Svelte or Lit as alternatives. https://blog.lusito.info/stop-using-and-recommending-react.html

If you’re giving Mastro a spin, please let us know if you run into anything that’s not immediately obvious. We always aim to improve our docs, error messages and general onboarding flow. Thanks!

Oh cool, the Safari async module loading bug I reported for a while back was selected for Interop 2026! And the WebKit team is already in the process of rewriting their module loader from scratch 🥳 Thanks @jakearchibald.com, @rich-harris.dev and everyone else who was involved in pushing this!

A terminal GUI library (like Phlex or OpenTUI) where you write HTML tables 🫣

Today on the pod, Mauro Bieg talks Mastro.js - a minimal web framework that's like 11ty + Astro's baby! Learn about routing, HTML templating, streaming & reactive UI. share.transistor.fm/s/387c5e24 #typescript

What's your favourite headless CMS to back a static site? After creating a Mastro template for Sveltia (a git-based CMS), I want to create one for an open source database-backed CMS that's easy to get started with.

Had a blast on @typescript.fm We talked about why I started Mastro, the design decisions behind it, and why modern #webdev feels harder than it should. Thanks a lot for having me, Kamran and Erik!

Finally added a README to our example of an interactive to-do list with SSR and REST API. It even avoids the "double data problem" (Or what do people outside the #solidjs community call sending the same data once as HTML and once as JSON?)

Been saying this for a while but the really exciting stuff on the web right now is all about how things we used to need JS for can now be done with pure CSS. There are a lot of opportunities to cut out client side bloat.

How can a complete web framework be ~700 lines of TypeScript? For one, everything is a route in Mastro.

Why TypeScript succeeded. And why a new web framework like Mastro has a very steep uphill-battle 😅 "progress often comes from making the systems you already depend on more capable instead of trying to start over. [...] Behavioral compatibility often matters more than architectural purity"

I’m terrible at coming up with blog post titles. What would you rather read? - “Inverting the build pipeline: how the Request/­Response-API can do it all” - “The Request/Response­-API is also great for static site and asset generation” Other suggestions? Post will go on mastrojs.github.io/blog/

Some website nowadays return markdown if the user agent asks for it? I’ve implemented this as a CF Worker for an otherwise static site, see quoted post. But now I just had an even better idea: a browser extension that asks for markdown and previews it nicely? No ads, no popups, no client-side JS! 🤩

I keep tweaking our landing page. This time I adjusted the "above-the-fold" text. Does it capture what Mastro is and why you would use it? Feedback welcome! mastrojs.github.io

Besides running on Deno, Node.js, Bun, and inside a web browser as a VSCode extension, Mastro now also runs on Cloudflare Workers! 🥳 mastrojs.github.io

Congrats! Developing and maintaining a complex framework takes lots of funding, and I’m glad Astro found a new home. With Mastro, we have a different approach. The name originally stood for minimal Astro, and we’re staying true to that. At just ~700 lines, Mastro will always be easily maintainable.

Where did all the web designers go?

Everything old is new again: what is HTTP streaming and how to do it with Mastro!

Behold! A slideVars #bookmarklet! codepen.io/cwacht/pen/y...

A few image format discoveries: AVIF is Baseline Newly Available as of 2024 (so I use that for icon tiles, which are much smaller than what they were in PNG and even smaller than webp). And, social sharing services now also support webp for Open Graph images: darekkay.com/blog/open-gr...

Our Web Performance Journey guide is live on PerfPlanet Calendar!

My article for Performance Calendar is live, looking at tips to help focus when doing performance traces.

Is “web components” finally no longer considered a dirty word by anyone outside the React-die-hard circle? thenewstack.io/web-componen...

CSS @​scope has landed in Firefox 146, making it a new baseline feature. Here's how it works:

What are you all using for CI/CD these days?

Web Performance Calendar day 6 with Aaron T. Grogg (@aarontgrogg.com). What if I told you that you need low-to-no JavaScript for interactive UI elements such as accordions, auto-expanding or auto-suggestion inputs, modals, hamburger menus and even more... calendar.perfplanet.com/2025/nolojs-...

Oh wow, we just passed 100 stars on GitHub 🤩 Thanks everyone, it means a lot! Here's to the next 100 stars!

Very interesting conversation. For me, the main take-away was really that different people mean very different things when they say "encapsulation". (1/n)