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TypeScript 5.0

devblogs.microsoft.com

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Re: TypeScript 5.0

#241

Post by claytongulick »

c-hendricks wrote: post #147
claytongulick wrote: post #73

Probably an unpopular opinion, but my favorite thing about typescript is what it's done for the jsdoc community. A bunch of stuff had to be built to support good tooling in vscode for types with JavaScript, and that was leveraged for jsdoc also. I don't use typescript, but I benefit from it in multiple ways, js doc and the occasional .d.ts file have made my life better.

If you use things like `import('some-package').SomeType` in JSDoc I don't think it's fair to say you don't use TypeScript. You do, that's only supported in TS.

Yep, and I do.

That's my point.

I don't write typescript, but it has done wonders for the jsdoc ecosystem.

Re: TypeScript 5.0

#242

Post by iudqnolq »

giraffe_lady wrote: post #141
dimitropoulos wrote: post #2

Without Angular, we may very well not have TypeScript today. The top thing listed in this release (TypeScript doesn't follow semver, btw) is about Decorators. I find the whole story about Angular's role in TypeScript early days to be very fascinating because I don't hear people talk about it anymore (just search "AtScript TypeScript" if you weren't around at the time). It was the Angular team that forced Decorators t…

god just think how good life would be if we had all switched to elm or reason instead.

If only Elm was infinitesimally less pure.

Re: TypeScript 5.0

#243

Post by cmrdporcupine »

spion wrote: post #87
endisneigh wrote: post #50

I have a strange take - I think Typescript types are better most other languages, including Java, C++ and Go. It's strange since TypeScript is adding types to a weakly typed language. If we could push JavaScript performance to be another order of magnitude faster it wouldn't be necessary to use other languages, imho. Of course, pushing it that far without effectively creating a new one would be difficult, to say the…

I used to think so too, until I tried Rust. By comparison, JavaScript (and by extension, TypeScript) is still lacking fundamental features and the library ecosystem situation is pretty bad. I wish there was a modern language that took all the good non-manual-memory-management things from Rust and added a GC and some immutable data structures. Error handling, enums, macros (with compile_error! / diagnostics API), trai…

You just described OCaml or StandardML.

Or as others have said, F#, or maybe Scala. Or if you're feeling really brainy, Haskell.

But Rust was, in its early days, basically inspired by the ML type system, its type inference model, and its pattern matching facilities. The first Rust compiler was written in OCaml.

Re: TypeScript 5.0

#244

Post by dmix »

halfmatthalfcat wrote: post #233
dmix wrote: post #194

Earlier quoted context omitted.

> Deep support for an alternative to exceptions using a Failable type Is there a good library for this currently? I've been looking for one and a Maybe library. The Maybe one I use is pretty small.

fp-ts (and most functional libraries) have a handy Either type just for this: https://gcanti.github.io/fp-ts/modules/Either.ts.html

That looks perfect thank you.

Re: TypeScript 5.0

#245

Post by iainmerrick »

Really glad to see we’ll now be able to import .ts files directly! Previously you had to import with a .js extension, or no extension at all.

The price for doing so is to turn off code generation, so TSC is only used for type-checking. But that’s the best way to use TSC anyway!

Re: TypeScript 5.0

#246

Post by devmunchies »

JamesSwift wrote: post #8
dimitropoulos wrote: post #2

Without Angular, we may very well not have TypeScript today. The top thing listed in this release (TypeScript doesn't follow semver, btw) is about Decorators. I find the whole story about Angular's role in TypeScript early days to be very fascinating because I don't hear people talk about it anymore (just search "AtScript TypeScript" if you weren't around at the time). It was the Angular team that forced Decorators t…

One of my most regretted decisions was evaluating Flow vs Typescript and going with Flow. Years later I had the opportunity to use Typescript and it was so nice comparatively. I've enjoyed it ever since. Of course, that was with years of development in its belt so maybe the experience wouldn't have been as nice if I went with it originally.

Interestingly, both flow and typescript have roots in OCaml/F# respectively. Flow was written in OCaml and the creator of Typescript was on the F# team at Microsoft.

Re: TypeScript 5.0

#247

Post by iainmerrick »

endisneigh wrote: post #50

I have a strange take - I think Typescript types are better most other languages, including Java, C++ and Go. It's strange since TypeScript is adding types to a weakly typed language. If we could push JavaScript performance to be another order of magnitude faster it wouldn't be necessary to use other languages, imho. Of course, pushing it that far without effectively creating a new one would be difficult, to say the…

One thing I wonder is whether a “strict mode” subset of TS could be compiled to efficient code. Disallow “any” and most of the dynamic and meta programming features of JS so it’s fully typesafe.

The type system is really nice, so even without being able to use the full range of JS hacks and escape hatches, I think it’d still be a nice language to work in.

Re: TypeScript 5.0

#248

Post by noisy_boy »

hatuthecat wrote: post #212
spion wrote: post #87

Earlier quoted context omitted.

I used to think so too, until I tried Rust. By comparison, JavaScript (and by extension, TypeScript) is still lacking fundamental features and the library ecosystem situation is pretty bad. I wish there was a modern language that took all the good non-manual-memory-management things from Rust and added a GC and some immutable data structures. Error handling, enums, macros (with compile_error! / diagnostics API), trai…

You’re basically describing Swift. Swift and Rust had a ton of cross pollination during their early years which led to those features developing similarly but memory management is a lot less targeted for extreme efficiency like Rust. Hopefully as the language continues to mature, the feasibility to use it outside of apple platforms also does because I really enjoy the language design.

Does Swift has pattern matching and equivalent of Option/Result enums? I tried it casually but the documentation didn't feel great and things felt like they assumed familiarity with Apple's ecosystem.

Re: TypeScript 5.0

#249

Post by Zuiii »

Has anyone found a way to get TypeScript to run directly in the browser without a build step since Microsoft removed the js files that did this?

Basically, Is this following pattern still possible?
If not, what typed language do people here use for buildless front-end dev? I REALLY want to move away from weak-dynamically-typed PLs.

Re: TypeScript 5.0

#250

Post by alcuadrado »

Zuiii wrote: post #249

Has anyone found a way to get TypeScript to run directly in the browser without a build step since Microsoft removed the js files that did this? Basically, Is this following pattern still possible? If not, what typed language do people here use for buildless front-end dev? I REALLY want to move away from weak-dynamically-typed PLs.

You can use typescript as jsdoc annotations
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