Disallow decorators on abstract/declare fields (#19210)

src/language-js/parse/babel.js

@@ -223,9 +223,6 @@ const allowedReasonCodesArray = [
   ```
   */
   "DeclarationMissingInitializer",
-
-  // https://github.com/babel/babel/pull/17949
-  "DecoratorAbstractMethod",
 ];
 const allowedReasonCodes = new Set(allowedReasonCodesArray);
 

tests/format/typescript/comments/16065-2.ts

@@ -3,14 +3,6 @@ class Foo {
   @decorator
   readonly /* comment */ propertyDefinition;
 
-  // TSAbstractPropertyDefinition
-  @decorator
-  abstract /* comment */ abstractPropertyDefinition;
-
-  // TSAbstractMethodDefinition
-  @decorator
-  abstract /* comment */ abstractMethodDefinition;
-
   // MethodDefinition
   @decorator
   private /* comment */ methodDefinition() {}

tests/format/typescript/comments/__snapshots__/format.test.js.snap

@@ -260,14 +260,6 @@ class Foo {
   @decorator
   readonly /* comment */ propertyDefinition;
 
-  // TSAbstractPropertyDefinition
-  @decorator
-  abstract /* comment */ abstractPropertyDefinition;
-
-  // TSAbstractMethodDefinition
-  @decorator
-  abstract /* comment */ abstractMethodDefinition;
-
   // MethodDefinition
   @decorator
   private /* comment */ methodDefinition() {}
@@ -289,14 +281,6 @@ class Foo {
   @decorator
   readonly /* comment */ propertyDefinition;
 
-  // TSAbstractPropertyDefinition
-  @decorator
-  abstract /* comment */ abstractPropertyDefinition;
-
-  // TSAbstractMethodDefinition
-  @decorator
-  abstract /* comment */ abstractMethodDefinition;
-
   // MethodDefinition
   @decorator
   private /* comment */ methodDefinition() {}

tests/format/typescript/decorators/__snapshots__/format.test.js.snap

@@ -292,12 +292,6 @@ class Something {
     readonly property: Array<string>
 }
 
-class Something2 {
-    @foo()
-    // comment
-    abstract property: Array<string>
-}
-
 =====================================output=====================================
 class Foo1 {
   @foo
@@ -329,12 +323,6 @@ class Something {
   readonly property: Array<string>;
 }
 
-class Something2 {
-  @foo()
-  // comment
-  abstract property: Array<string>;
-}
-
 ================================================================================
 `;
 

tests/format/typescript/decorators/decorators-comments.ts

@@ -28,9 +28,3 @@ class Something {
     // comment
     readonly property: Array<string>
 }
-
-class Something2 {
-    @foo()
-    // comment
-    abstract property: Array<string>
-}