Also exclude class with decorators

Since decorators can introduce arbitrary properties

Author: sandersn

src/compiler/checker.ts

@@ -31683,10 +31683,13 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         if (file) {
             if (compilerOptions.checkJs === undefined && file.checkJsDirective === undefined && (file.scriptKind === ScriptKind.JS || file.scriptKind === ScriptKind.JSX)) {
                 const declarationFile = forEach(suggestion?.declarations, getSourceFileOfNode);
-                const suggestionHasNoExtends = !suggestion?.valueDeclaration || !isClassLike(suggestion.valueDeclaration) || suggestion.valueDeclaration.heritageClauses?.length
+                const suggestionHasNoExtendsOrDecorators = !suggestion?.valueDeclaration
+                    || !isClassLike(suggestion.valueDeclaration)
+                    || suggestion.valueDeclaration.heritageClauses?.length
+                    || classOrConstructorParameterIsDecorated(/*useLegacyDecorators*/ false, suggestion.valueDeclaration);
                 return !(file !== declarationFile && !!declarationFile && isGlobalSourceFile(declarationFile))
-                    && !(excludeClasses && suggestion && suggestion.flags & SymbolFlags.Class && suggestionHasNoExtends)
-                    && !(!!node && excludeClasses && isPropertyAccessExpression(node) && node.expression.kind === SyntaxKind.ThisKeyword && suggestionHasNoExtends);
+                    && !(excludeClasses && suggestion && suggestion.flags & SymbolFlags.Class && suggestionHasNoExtendsOrDecorators)
+                    && !(!!node && excludeClasses && isPropertyAccessExpression(node) && node.expression.kind === SyntaxKind.ThisKeyword && suggestionHasNoExtendsOrDecorators);
             }
         }
         return false;

tests/cases/fourslash/codeFixSpellingJs9.ts

@@ -23,6 +23,17 @@
 //// const person = new Person();
 //// person.[|getFavoriteColour|]();
 //// person.[|getFavoriteColoxr|]();
+//// function deco() { }
+//// @deco
+//// class Art {
+////   style = true
+//// }
+//// const a = new Art()
+//// a.[|stylo|]
+//// @deco
+//// class Double extends Art { }
+//// const db = new Double()
+//// db.[|stylo|]
 verify.codeFixAll({
     fixId: "fixSpelling",
     fixAllDescription: "Fix all detected spelling errors",
@@ -48,5 +59,16 @@ class Person {
 
 const person = new Person();
 person.getFavoriteColor();
-person.getFavoriteColor();`,
+person.getFavoriteColor();
+function deco() { }
+@deco
+class Art {
+  style = true
+}
+const a = new Art()
+a.stylo
+@deco
+class Double extends Art { }
+const db = new Double()
+db.stylo`,
 });