- yeah our project uses typescript
- look inside
- any
this post was submitted on 20 Jul 2024
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JavaScript is so ass, typescript is just putting ketchup on a rotten banana. Better just to choke it down quickly if you have to eat it, IMO.
I wouldn't say JavaScript is horrible, it's a fine little language to do general things in if you know JS well. I would say, though, that it is not a great language. Give me F# and I'm happy forever. I do not like typescript that much more than JS.
PHP is better than Javascript these days.
Fucking PHP.
The only thing JS really has going for it is ease of execution, since any browser can run your code... though the ubiquity of Python is closing that gap.
that's crazy, it's almost like it was created to run on a browser, who would do such an evil thing?
I'll bite. Why JS bad?
Short answer:
Long answer:
There are a lot of gatcha moments in JS with weird behavior that makes it really easy to shoot yourself in the foot. It does get better as you get more experience but a lot of the oddities probably shouldn't have existed to begin with. For what it was originally intended for (adding light scripting to websites) it's fine but it very quickly gets out of hand the more you try to scale it up to larger codebases. TypeScript helps a little bit but the existence (and common usage) of 'any' has the potential to completely ruin any type safety guarantees TypeScript is intended to provide.
It's always the type coersion. Just use === and 90% of the "footguns" people complain about go away.
That's true but at the same time the fact that JavaScript equality is so broken that they needed a
===operator is exactly the problem I'm talking about.And those examples were low hanging fruit but there are a million other ways JavaScript just makes it easy to write buggy code that doesn't scale because the JavaScript abstraction hides everything that's actually going on.
For example, all of the list abstractions (map, filter, reduce, etc.) will copy the array to a new list every time you chain them. Doing something like
.filter(condition).map(to new value)will copy the list twice and iterate over each new list separately. In most other languages (Java, C#, Rust, Go, etc.) the list abstractions are done over some sort of iterator or stream before being converted back into a list so that the copy only has to be done once. This makes using list abstractions pretty slow in JavaScript, especially when you have to chain multiple of them.Another simple but really annoying thing that I've seen cause a lot of bugs - Array.sort will convert everything into strings and then sort if you don't give it a comparison function. Yes, even with a list of numbers. [ -2, -1, 1, 2, 10 ] will become [ -1, -2, 1, 10, 2 ] when you sort it unless you pass in a function. But if you're looking over code you wrote to check it, seeing a
list.sort()won't necessarily stand out to most people as looking incorrect, but the behavior doesn't match what most people would assume.All this is also without even getting started on the million JS frameworks and libraries which make it really easy to have vendor lock-in and version lock-in at the same time because upgrading or switching packages frequently requires a lot of changes unless you're specifically isolating libraries to be useful (see any UI package
x, and then the additional versionx-reactorx-angular)Tldr; Why can't we have nice things JS?
This is all true, although I don't think it warrants saying that it's worse than PHP.
That's fair. I was mostly commenting on my own experiences with JS/TS, I've never used PHP so I can't say if it's better or worse but a few people I know have said that modern PHP is actually pretty good for personal projects. I'm guessing it would have its own set of nightmares if it was scaled to an enterprise level though.
This methods were added to generator recently. So you can avoid copying the array in memory.
In my opinion, it's also what make JS good. There a package for almost everything.
Back when I was still doing JS stuff, switching to TS was so good for the developer experience. Yeah, there's still JS jank, and types are not validated at runtime, which was a pain in the backend (pun intended), but still I much prefer it to vanilla JS
You know, you can validate data structures at runtime... and write unit tests... TS is not a substitute for those things.