TanStack Query makes server-side data fetching and caching so unbelievably easy
The createQuery and createMutation hooks are wrappers around promises (e.g. fetch) which allows monitoring loading, success and error states much more programatically
The “tagging” system gives you direct power about what you want to invalidate and when
Alternatives
SvelteKit has built-in server-side data fetching and submitting
This is currently used for the registration/login system as it means that the initial page load already knows if the user has logged in or not, so you don’t get a flash of “loading” before the navbar appears or before you get redirected
