feat(prefer-svelte-reactivity): ignoring encapsulated local variables by default

.changeset/long-ghosts-prove.md

@@ -0,0 +1,5 @@
+---
+'eslint-plugin-svelte': minor
+---
+
+feat(prefer-svelte-reactivity): ignoring variables encapsulated in functions

.changeset/lovely-carpets-clean.md

@@ -0,0 +1,5 @@
+---
+'eslint-plugin-svelte': minor
+---
+
+feat(prefer-svelte-reactivity): reporting public properties

.changeset/lovely-moments-kneel.md

@@ -0,0 +1,5 @@
+---
+'eslint-plugin-svelte': minor
+---
+
+feat(prefer-svelte-reactivity): reporting returned variables

docs/rules/prefer-svelte-reactivity.md

@@ -105,7 +105,18 @@ export default e;
 
 ## :wrench: Options
 
-Nothing.
+```json
+{
+  "svelte/prefer-svelte-reactivity": [
+    "error",
+    {
+      "ignoreEncapsulatedLocalVariables": true
+    }
+  ]
+}
+```
+
+- `ignoreEncapsulatedLocalVariables` ... Whether to ignore variables that are defined inside a function and aren't returned, thus being encapsulated in the function. Default `true`.
 
 ## :books: Further Reading
 

packages/eslint-plugin-svelte/src/rule-types.ts

@@ -320,7 +320,7 @@ export interface RuleOptions {
    * disallow using mutable instances of built-in classes where a reactive alternative is provided by svelte/reactivity
    * @see https://sveltejs.github.io/eslint-plugin-svelte/rules/prefer-svelte-reactivity/
    */
-  'svelte/prefer-svelte-reactivity'?: Linter.RuleEntry<[]>
+  'svelte/prefer-svelte-reactivity'?: Linter.RuleEntry<SveltePreferSvelteReactivity>
   /**
    * Prefer using writable $derived instead of $state and $effect
    * @see https://sveltejs.github.io/eslint-plugin-svelte/rules/prefer-writable-derived/
@@ -580,6 +580,10 @@ type SveltePreferConst = []|[{
   excludedRunes?: string[]
   [k: string]: unknown | undefined
 }]
+// ----- svelte/prefer-svelte-reactivity -----
+type SveltePreferSvelteReactivity = []|[{
+  ignoreEncapsulatedLocalVariables?: boolean
+}]
 // ----- svelte/require-event-prefix -----
 type SvelteRequireEventPrefix = []|[{
   checkAsyncFunctions?: boolean