Wow, just learned of Svelte from this. After reading their explanatory blog post and coming upon this blurb:
That all changed with the advent of hooks [React and Vue],
which handle state in a very different fashion. Many
frameworks started experimenting with their own
implementations of hooks, but we quickly concluded it
wasn't a direction we wanted to go in
...
We can just use the language. Updating some count value — and
all the things that depend on it — should be as simple as
this:
count += 1;
FWIW, MobX lets you mutate state in the same way. It does require you to make use of its observer/observable functions to make things reactive, but in general it works amazingly well. I strongly urge everyone to try it!
MobX is great. It's even better when you remove the virtual dom and rely only in its internal dependency tracking: