David Johnston

Full Stack JavaScript Developer. I think a lot about how to make things testable. Want to make programming fun.

[David Johnston @blacksheepcode]

@kentcdodds Tests are a good test of how usable your code is in other contexts.

[David Johnston @blacksheepcode]

@kyleshevlin I've got to feel sorry for the devs who write code who later have a consultant come in and put them on blast on twitter.

[David Johnston @blacksheepcode]

@kentcdodds Whaaaat. Github is 100% good, no notes

[David Johnston @blacksheepcode]

@basarat wtf. 😳

[David Johnston @blacksheepcode]

@MattiaRasulo @housecor @jestjs_ @vitest_dev @playwrightweb @Cypress_io You can do component tests with real browser tools like Cypress though. And these are arguably more useful than something like RTL where you're having to mock some browser APIs, and likely getting it wrong.

[David Johnston @blacksheepcode]

@thekitze I still use it. It's a good FTP client.

[Jimmy Wales @jimmy_wales]

I forgot my bank password and lost my entire net worth. No, actually, that didn't happen, because banks work and bitcoin doesn't.

[David Johnston @blacksheepcode]

@housecor users, then we can widen that label type to `label?: string | (user: User) => string`. The old code works fine, but we've got our new improved functionality too.

[David Johnston @blacksheepcode]

@housecor No... widening types is a pretty standard pattern for extending code functionality without making breaking changes.

For example, let's say we had a function `renderUsers(users: User[], label?: string)` and we realise 'oops, we want to dynamically determine the label based on...

[Michael Arnaldi @MichaelArnaldi]

@housecor Far too general, barrel files are useful in many scenarios including reducing circular dependencies. Tree shaking is totally OK, in every tool since about 5y

[MelbJS @melbjs]

🎉 Join us in 2 weeks for a special year-end event! Wednesday December 13, 6pm at Kogan in South Melbourne.

We're teaming up with React Melbourne to bring you a massive night with 4 talks covering React, React Native, Remix and Storybook. Don't miss it!

https://t.co/JQr0e5htjX

[David Johnston @blacksheepcode]

Oh FFS. What's even the point of having DMs open?

[MelbJS @melbjs]

🎉 1 day to go! Join us tomorrow, 6pm at Culture Amp.

Remix, Server Components, Next.js: Navigating the Future of React
@benteese

Publishing with Changesets
@benjervi

Testing Strategies for SPAs with State Management
@blacksheepcode

👉 Register now https://t.co/cx2ZGaWnwE

[David Johnston @blacksheepcode]

Accompanying blog post for my talk at @melbjs_ tomorrow night: https://t.co/b4ghDBAn3p

[David Johnston @blacksheepcode]

@housecor Do your clients get annoyed at your posting critical takes on twitter?

[David Johnston @blacksheepcode]

@creatine_cycle Use a form.

[Max Weinbach @mweinbach]

Oh oh it's back to school laptop season let me give you the fundamentals:

You don't need a MacBook Pro, get an Air.

If you want Windows:
Lenovo Yoga series in your price range
Dell XPS series in your price range
HP Spectre series in your price range

Don't get a gaming laptop

[Jason Lengstorf @jlengstorf]

I really like reducers for when I want to write some code that makes me feel like the cleverest lad in JS Land for a day and then becomes utterly incomprehensible forever after

[David Johnston @blacksheepcode]

@TkDodo Edit: *`qc.getQueryData`

[David Johnston @blacksheepcode]

@TkDodo I suspect because there are plenty of cases where you do need to be explicit about the data type, eg when using `useQueryData`, so habit/ consistency.

[David Johnston @blacksheepcode]

@TkDodo (probably my biggest gripe about rq, is the lack of type safety with getQueryData, setQueryData, but I'll live with it)