Same boat: people who hate typescript and therefore ensuring type safety probably also hate unit tests because they are too inconvenient to awesome rockstar developers.
One hundred percent this. It reeks of the kind of ego you get from devs that think their code is so perfect it's inherently easily maintainable.
I know junior devs that don't struggle with types and unit testing—any dev that thinks they're too good for either is immediately sub-junior in my assessment, because they're clearly unable to write code intended to be maintained by a team.
Lmao I’ve literally had conversations with people who have asked me to not be as rigorous with unit tests because you have to change some tests when you make a modification to the business logic.
I love unit tests but I hate the eternal struggle behind them.
We should make unit tests so we can tell when the build runs that the app is going to be consistent
Everyone cheers
We lose a sprint setting up unit tests
Oh this one test just went yellow, somebody spends a few hours figuring it out and finds that it's a bug in the unit test. No no we're good That's just a bug in the unit test we'll plan to fix that in the next Sprint.
Oh look now this unit test is going red we're blocked. 2 hours later they find out that it's a real problem but it's not so bad that it overrides current feature work. Well we're going to need to override that and we'll have to fix it in the next sprint.
Unit test failures slowly degrade in priority to try to get feature work done. You end up with a backlog full of yellow and red known problems and no one pays any attention to you that tests anymore.
I think it’s more of a JSDoc > TS thing. I need to check the drama, but I don’t believe anyone would want to write vanilla JS without some type declarations..
Honestly I'm surprised Microsoft isn't pushing for that already. They already have a decently popular browser (Edge), they own TS, and they have a history with not giving a shit about standards (IE and ActiveX).
I feel like (and it was created by Microsoft which would support this) the purpose of TypeScript is to make web development palatable for C#/C++/Java developers.
If I'm writing a Go app with a JS frontend component but then I decide to use Typescript, suddenly I have NPM, Node, and realistically probably some JS build system like Grunt as dependencies of my project.
Basically, it just adds more moving parts to the project when I could get away with a) a simpler build process and b) less separation between me and the browser.
To be fair, I've never used TypeScript, but this is what's kept me from using TypeScript.
For your Go code to be useful, you've got to set up the Go compiler right?
As much as I wouldn't recommend it, you can even install the typescript compiler via an OS package manager (at least in most Debian distributions)
At that point (and once you've added it to your makefile, or however else you're triggering your go build), surely then there's zero additional moving parts needed to compile your front end vs your backend?
Not least of all, I'd argue having a compiler tell me I messed up immediately is a bonus too vs poking around for some time until I get an error in the JS console
You are making a lot of false assumptions about typescript and bringing in a lot of outside problems that don't have anything to do with the language. Try working with typescript. It is a strict super set of javascript. So if you like vanilla JS, you can just keep writing it, then slowly introduce the syntactic sugar that typescript provides. I did the javascript and coffee script thing for a long while, and typescript is just the better way for most use cases at this point.
I usually write Typescript with Vue and SSR so my server and client are using the same tooling. If I was writing a basic frontend with minimal JavaScript I would just (and have) use jsdoc for typing.
But let's be fair, what you mentioned as dependencies are development dependencies and don't impact the end user (outside of poorly optimized build systems causing issues). Build systems can have some great benefits. Such as reducing file size by utilizing methods such as tree shaking to prune out the unused classes in a CSS library.
It just comes down to choosing the tools to suit the job. Sure, you can use a table saw to cut a stick but it's probably easier just to use a handsaw. Whereas if you're cutting a large plywood board you could make do with a handsaw but it'll take longer and the result might not be pretty.
Some rather big projects started to remove TS, which upset the community. One if not the biggest is Turbo, from the Ruby-on-Rails guy. He said:
"[TS] pollutes the code with type gymnastics that add ever so little joy to my development experience, and quite frequently considerable grief. Things that should be easy become hard".
Now there is a bit of a battle whether or not TS is actually all that great.
Same, but I come from a C++ background so strong typing is in my blood. This sounds like people who write bad code complaining because the language/transpiler won’t let them write bad code.
I don't do java- or typescript but that guy's comment definitely translates as "I want to keep on writing messy code and you can't force me to learn to clean my shit up".
I've heard it's more of a problem on the library side. But I've personally had pains with ts when working with quirky features such as enums or discriminating unions. Part of the problem in my opinion is that the types all disappear at runtime, so you lose a lot of the joy of a statically typed language. For example, an API can pass you unexpected garbage and all your ts type wrangling helps not at all.
It's more for library devs when writing their libraries. Using TS means you're writing in one language and then distributing the compiled version for users.
As users can use things in a lot of different ways you have to do a lot of type "gymnastics" to make your library API as useful as possible.
That means spending a lot of time setting up types when a jsdoc and .d.ts file will do the same thing for library consumers.
It's really a non issue. If some library devs think they can ship code which is easier for them to maintain correctly, and end users have the same developer experience, then it's totally cool.
Of course people with no nuance are using this as an argument for why no one should write in typescript (because they don't like it for some reason). This thread has a bunch of people doing this. That creates drama, but there really shouldn't be any. TS is bae for me, but I totally get why library devs might want to not use it.
I'm not really involved in javascript land so im parroting off of what i've heard for "why js over ts?"
it reduces file size since you no longer need to ship source maps
ctrl+clicking stuff will take you to the definition rather than an unhelpful type declaration
if you spot a bug in the library, you can edit the source directly than having to recompile/reimport
ts adds some unnecessary type "gymnastics" (can't speak for what this means), when all they really want is intellisense thru jsdoc
So mainly: devs who don't prefer strongly typed languages, and library devs who find typescript to be less transparent and more time consuming for new and old contributors than it's worth
Why do you have to ship a source map? It compiles to vanilla js
Not sure what editor, but in neovim (which uses tsserver on my end for LSP) I can either jump to the type declaration or the actual implementation. This is a tooling problem not inherent to typescript
This doesn't make any sense. You'd have the same problem with minified js or css etc.
It means they are forced to use types properly and do the tiniest bit of thinking and planning that results in fewer type errors (think undefined variables and properties, etc)
Not a bad summary, but I take issue with all the points
Edit: The sourcemap comment is relevant to package size and not to final bundle size per the HN comment linked below. Also, the cmd+click critique rings truer now that I know it's in the context of an installed package. Another critique is build time which is fair enough.
Thanks :) I didn't see anyone mention the points made by the svelte guys https://news.ycombinator.com/item?id=35892250 which is a shame since I thought they made better points than the dramatic "type gymnastics" argument haha (i am biased toward type-safety, as long as there is idiomatic, algebraic data types w/ pattern matching)
Overall it sounds like a major change with a few minor/moderate benefits, but it's their choice and time will tell if it was worth it :P
As a person who has been writing JS for a very long time, and was building SPAs before the term existed...
It all comes down to return on investment. The arguments I always hear in favor of TS are solutions to problems I've never had, at the expense of writing more code to do the same amount of work.
It's the same for people who tell me that they think everything should be tested then show me the tests they spent the last 40 hours working on, which I can quickly see are extremely brittle and unlikely to ever show any ROI. You will never be able to test every scenario, increasing the amount of things you test arbitrarily just increases the cost of building and maintaining your software. Each test you add should be something worth building and maintaining.
Excess code that isn't providing value is far more detrimental than not having a few extra tests or type safety.