svelte/packages/svelte/messages/compile-warnings/script.md

export_let_unused

Component has unused export property '%name%'. If it is for external reference only, please consider using export const %name%

legacy_component_creation

Svelte 5 components are no longer classes. Instantiate them using mount or hydrate (imported from 'svelte') instead.

non_reactive_update

%name% is updated, but is not declared with $state(...). Changing its value will not correctly trigger updates

perf_avoid_inline_class

Avoid 'new class' — instead, declare the class at the top level scope

perf_avoid_nested_class

Avoid declaring classes below the top level scope

reactive_declaration_invalid_placement

Reactive declarations only exist at the top level of the instance script

reactive_declaration_module_script_dependency

Reassignments of module-level declarations will not cause reactive statements to update

state_referenced_locally

State referenced in its own scope will never update. Did you mean to reference it inside a closure?

store_rune_conflict

It looks like you're using the $%name% rune, but there is a local binding called %name%. Referencing a local variable with a $ prefix will create a store subscription. Please rename %name% to avoid the ambiguity