JS lover too until I met TS here. I've led a big full-stack app project using TypeScript so I probably can give you some insight.
I agree with this comment by Edward Tam. I suggest not to rely much on class and class extensions as TypeScript doesn't have good support for OOP extensions. Even though TS was born from OOP paradigm, it's actually easier to just use type and namespaced-functions is the form of static methods in a class. I use class only if I need a long-running data scope which seemingly has "a separate runtime" and I use it rarely.
I would recommend watching this youtube.com/watch?v=yy8jQgmhbAU and youtube.com/watch?v=aKLntZcp27M. Even though it's rust and c++ it gave a lot of insight on how to make code that is development-scalable, meaning adding/changing/removing features in the future will not be as hard as when you use by the book OOP, which I mistakenly use in my first projects.
Out of interest, do you use an ORM with TS? If so which one? I have yet to find one that doesn't seem like it wants to work strictly in the OOP paradigm. I need an ORM that properly supports relational data structures like ternary relationships. The only one that looks bearable is Objection which essentially seems to be a query builder that holds a representation of your schema in code to provide helpers to do easy queries and eager loading etc. Unfortunately as you've pointed out, it doesn't really have support for TS.
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So, I wrote this article a couple months ago now, and since then I've developed my project into a pretty sizable codebase, still using Objection with TypeScript. IMHO, it works fine. I understand what a few other commenters have said about TypeScript and classes, but after digging in a bit deeper, I haven't encountered any problems I couldn't pretty easily work around. I like Objection a lot; I think it occupies a pretty nice middle ground between query builders and ORMs where it gives you some very nice class-based features out of the box, but still provides low-level access to SQL queries when you need it in a way that many Hibernate-style ORMs do not.
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JS lover too until I met TS here. I've led a big full-stack app project using TypeScript so I probably can give you some insight.
I agree with this comment by Edward Tam. I suggest not to rely much on class and class extensions as TypeScript doesn't have good support for OOP extensions. Even though TS was born from OOP paradigm, it's actually easier to just use
typeand namespaced-functions is the form ofstatic methods in a class. I use class only if I need a long-running data scope which seemingly has "a separate runtime" and I use it rarely.I would recommend watching this youtube.com/watch?v=yy8jQgmhbAU and youtube.com/watch?v=aKLntZcp27M. Even though it's rust and c++ it gave a lot of insight on how to make code that is development-scalable, meaning adding/changing/removing features in the future will not be as hard as when you use by the book OOP, which I mistakenly use in my first projects.
Also, check this out, TypeScript 3.5's feature higher-order type inference which is super neat.
It's nice to see more people embracing TypeScript. Welcome to the ecosystem, good luck and have fun.
Out of interest, do you use an ORM with TS? If so which one? I have yet to find one that doesn't seem like it wants to work strictly in the OOP paradigm. I need an ORM that properly supports relational data structures like ternary relationships. The only one that looks bearable is Objection which essentially seems to be a query builder that holds a representation of your schema in code to provide helpers to do easy queries and eager loading etc. Unfortunately as you've pointed out, it doesn't really have support for TS.
So, I wrote this article a couple months ago now, and since then I've developed my project into a pretty sizable codebase, still using Objection with TypeScript. IMHO, it works fine. I understand what a few other commenters have said about TypeScript and classes, but after digging in a bit deeper, I haven't encountered any problems I couldn't pretty easily work around. I like Objection a lot; I think it occupies a pretty nice middle ground between query builders and ORMs where it gives you some very nice class-based features out of the box, but still provides low-level access to SQL queries when you need it in a way that many Hibernate-style ORMs do not.