Fixed block-lang false positives for non-svelte files

.changeset/eleven-guests-chew.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-svelte": patch
+---
+
+fix(block-lang): fixed false positives for non-svelte files

src/rules/block-lang.ts

@@ -59,6 +59,9 @@ export default createRule("block-lang", {
     type: "suggestion",
   },
   create(context) {
+    if (!context.parserServices.isSvelte) {
+      return {}
+    }
     const enforceScriptPresent: boolean =
       context.options[0]?.enforceScriptPresent ?? false
     const enforceStylePresent: boolean =

tests/fixtures/rules/block-lang/valid/non-svelte/_config.json

@@ -0,0 +1,10 @@
+{
+  "options": [
+    {
+      "enforceScriptPresent": true,
+      "enforceStylePresent": true,
+      "script": "ts",
+      "style": "scss"
+    }
+  ]
+}

tests/fixtures/rules/block-lang/valid/non-svelte/non-svelte01-input.ts

@@ -0,0 +1 @@
+export const value: boolean | number = false

tests/fixtures/rules/block-lang/valid/non-svelte/non-svelte02-input.js

@@ -0,0 +1 @@
+export const value = false