Are there any anti-patterns that I shouldn't use in sveltekit?

[kimud6003]

For example, I would like to know about some inconvenient precautions such as making and using DOM by myself, or managing all states as a store.

[jtlapp]

One of my first mistakes with Svelte was placing generic modals in the layout and having different pages pop up that modal with page-specific information. These modals would sometimes survive page changes, and managing state became tricky. I eventually learned to embed the modal on/off logic separately in each page that having a modal.