So happy to see the attention Typescript is getting lately. Absolutely love the language, and have been using it since it got released.
<button (click)="login(email, pass)" />
login(email: string, pass: string) {
}
What benefit, then, does TypeScript provide? I understand it's compile-time guarantees, but how does that help if the types are coming in from HTML land which the TypeScript compiler doesn't examine at all?
That's not really a typescript issue though, and it works great with libraries that don't use string templates. From what I've seen the angular community hasn't really prioritized a typecheck-able templating language.
Plenty of things like HTML form elements take numbers or strings just fine, as it all outputs to strings in the end. Additionally, by breaking up stuff into smaller composable components there should be enough gating and typing layers, at least with Vue/Vuex that's the case. If it was just plopping straight into the elements 1-to-1 that might be a different story.
Disclaimer: I have heard about the above enough to dig up a random blog post about it but I don't know a lot about how it works.
I think in JSX (and I've seen experiments with lit too) there is also integration between the template and type checker.