Mateusz Burzyński
@andarist.bsky.social
programmer but also a little bit of code-poet wannabe, maintaining XState, Emotion, Changesets, redux-saga & more, OSS enthusiast
We’ve been working on a new site for Changesets with a lot of new docs! If changesets has been confusing before, hopefully some of these will help, or let us know what else could be improved. Check it out 👉 changesets.dev
Changesets
A tool to manage versioning and changelogs with a focus on monorepos
changesets.dev
My Replay time-travel-based React+Redux perf reports experiments are coming together! Just nailed sourcemapped component + selector identities, and I've got accurate timing details on dispatches + renders from a Replay DevTools E2E recording! Early perf report example attached.
Mark Erikson@acemarke.dev · 6mo agoA week-ish later - it's working! Rebuilt my React+Redux dispatch+render perf POC on top of Replay's current infra. Currently extracting dispatch+render timings and selector calls . Just raw data atm, but now I can build meaningful visualizations / perf analysis with this! time travel's awesome!
Yesssss github.com/microsoft/Ty...
Enable `--strict` by default · Issue #62333 · microsoft/TypeScript
Background Almost a decade ago, we began to add certain options beyond --noImplicitAny and --strictNullChecks. Flags like --strictFunctionTypes, --noImplicitThis, and --strictBindCallApply have bee...
github.com
Trivia question - how many errors are reported by TS here? (:
![declare const test: never;
if ("foo" in test) {
}
test.foo;
test["foo"];
const { foo } = test;](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:vuffylqbkratb2z65hsvrat3/bafkreibrwvviyd34tu6ehscclnbo34aonkeujrqazwwfs2la3slq4ofaqe)
@jakebailey.dev ported my perf-oriented PR to TS-Go and it helps quite a bit (%-wise) there too! This is nice github.com/microsoft/ty...
Port TS PR 61505 - Cache mapper instantiations by jakebailey · Pull Request #1358 · microsoft/typescript-go
This is an early port of microsoft/TypeScript#61505, because I like to go fast Calculating the key increases allocs by a bit (really wish we had the yet-to-exist Go custom map implementation), but ...
github.com
Weird trivia learned while looking through v8's source: function fn(a) { console.log(a) } fn.toString() // 'function fn(a) { console.log(a) }' const bound = fn.bind(null) bound.toString() // 'function () { [native code] }'
People: lockfiles are important! People: uses github/action@v1 Me: uses github/action@v1 🫠
A prerelease of Changesets v3 is out! Some code and dependency cleanups so far, with more minor breaking changes soon, but should be simple to upgrade. Thanks to @andarist.bsky.social for helping to make this happen. github.com/changesets/c...
Release @changesets/cli@3.0.0-next.0 · changesets/changesets
Major Changes #1479 7f34a00 Thanks @bluwy! - Add "engines" field for explicit node version support. The supported node versions are >=18.0.0. #1482 df424a4 Thanks @Andarist! - From now on this ...
github.com
@searyanc.dev what's the proper mental model when it comes to void's presence in unions and intersections? and how it should behave when those are narrowed down by CFA etc? I can't find comprehensive answer to this anywhere
I have one bad habit I don't like: I'm trying to fix every issue I find in my node_modules I have one good thing to say about myself: I'm trying to fix every issue I find in my node_modules
Once again I reminded myself how awesome Replay and time-travel debugging is. True game changer - I'd be hunting this bug for hooours without it.
> Unable to evaluate expression: call is only supported with topmost stack frame 🫠🫠🫠 I hate this sooo much
I couldn't believe this thing when I first heard about it and I'm truly amazed that Dimitri had so much stubbornness in him that he stuck with it and made it happen
MichiganTypeScript@michigantypescript.com · last yr.Doom now runs in @typescriptlang.org types. What a journey this one's been.
I feel like I'm abusing implementation details of TypeScript just a little bit too much here 🤣 github.com/statelyai/xs...
[@xstate/store] v3 by davidkpiano · Pull Request #5175 · statelyai/xstate
Actor-based state management & orchestration for complex app logic. - [@xstate/store] v3 by davidkpiano · Pull Request #5175 · statelyai/xstate
github.com
I just had to alias `util` to `node:util` using Vite's aliasing option. Life is beautiful
I've intentionally used default case in switch/case on non-last position for the first time in my life, AMA github.com/thysultan/st...
Fixed `@left-*` parsing by Andarist · Pull Request #342 · thysultan/stylis
fixes #341
github.com
This was an interesting dive for me into how TS constructs its control flow information, I played a couple of times with interpreting its pieces in the narrowing-related code, but I almost never had a need to change how its created: github.com/microsoft/Ty...
Fixed an issue with for statement's incrementor missing continue's control flow information by Andarist · Pull Request #60950 · microsoft/TypeScript
fixes #60945
github.com
I had it lying on my machine since August, it's time to tie 2024's loose ends 😅 so I finally got myself to push it out and open a PR cc @colinhacks.com @ssalbdivad.dev @effect-ts.bsky.social github.com/microsoft/Ty...
Add support for JSDoc `@ignore` to allow for hiding properties from completions by Andarist · Pull Request #60895 · microsoft/TypeScript
closes #47613
github.com
JS class private fields trivia #1 - you can access them in subclasses as long as those subclasses are defined within the superclass
OSS is weird, I maintain packages that I don't even use at all nowadays
nice experimentation by @jfet97.bsky.social going on: github.com/microsoft/Ty...
Let primitive types discriminate a union of objects by jfet97 · Pull Request #60718 · microsoft/TypeScript
Main goal The ultimate goal of this PR is to allow primitive types in object unions to act as discriminants, even when there are no unit/literal types involved. Some examples of this are as follows...
github.com
I'm supposed to be good at TypeScript but typing generic wrappers around React.forwardRef is... 🫠
Inspired by @tkdodo.eu, I opened a PR with a codefix proposal to add "missing" awaits into return statements in async function enclosed by try statements github.com/microsoft/Ty...
Implement codefix for adding missing `await` in `return` statements enclosed by try statements by Andarist · Pull Request #60642 · microsoft/TypeScript
Given that async functions flatten returned promises it's a fairly easy mistake to make to assume that try/catch/finally enclosing a returned promise can handle that as if return await p would ...
github.com
I'm reading v8 source code to understand how promises are created and chained internally... what my life has become
