refactor(core): Don't generate standalone: true for definitions (#58238)

The runtime default is now `standalone: true`.
`ɵɵdefineComponent`, `ɵɵdefineDirective` and `ɵɵdefinePipe` now set `standalone` as `true` by default in the definitions.

PR Close #58238

goldens/size-tracking/integration-payloads.json

@@ -15,7 +15,7 @@
     "uncompressed": {
       "main": 108611,
       "polyfills": 34169,
-      "lazy.routes": 388
+      "lazy.routes": 368
     }
   },
   "forms": {
@@ -49,7 +49,7 @@
     "uncompressed": {
       "main": 11497,
       "polyfills": 33807,
-      "defer.component": 371
+      "defer.component": 351
     }
   },
   "platform-server-hydration/browser": {

packages/compiler/src/render3/r3_pipe_compiler.ts

@@ -60,9 +60,8 @@ export function compilePipeFromMetadata(metadata: R3PipeMetadata): R3CompiledExp
   // e.g. `pure: true`
   definitionMapValues.push({key: 'pure', value: o.literal(metadata.pure), quoted: false});
 
-  // TODO: standalone as default value (invert the condition)
-  if (metadata.isStandalone) {
-    definitionMapValues.push({key: 'standalone', value: o.literal(true), quoted: false});
+  if (metadata.isStandalone === false) {
+    definitionMapValues.push({key: 'standalone', value: o.literal(false), quoted: false});
   }
 
   const expression = o

packages/compiler/src/render3/view/compiler.ts

@@ -93,8 +93,8 @@ function baseDirectiveFields(
     definitionMap.set('exportAs', o.literalArr(meta.exportAs.map((e) => o.literal(e))));
   }
 
-  if (meta.isStandalone) {
-    definitionMap.set('standalone', o.literal(true));
+  if (meta.isStandalone === false) {
+    definitionMap.set('standalone', o.literal(false));
   }
   if (meta.isSignal) {
     definitionMap.set('signals', o.literal(true));

packages/core/src/render3/definition.ts

@@ -38,6 +38,7 @@ import {InputFlags} from './interfaces/input_flags';
 import type {TAttributes, TConstantsOrFactory} from './interfaces/node';
 import {CssSelectorList} from './interfaces/projection';
 import {stringifyCSSSelectorList} from './node_selector_matcher';
+import {NG_STANDALONE_DEFAULT_VALUE} from './standalone-default-value';
 
 /**
  * Map of inputs for a given directive/component.
@@ -603,7 +604,7 @@ export function ɵɵdefinePipe<T>(pipeDef: {
     name: pipeDef.name,
     factory: null,
     pure: pipeDef.pure !== false,
-    standalone: pipeDef.standalone === true,
+    standalone: pipeDef.standalone ?? NG_STANDALONE_DEFAULT_VALUE,
     onDestroy: pipeDef.type.prototype.ngOnDestroy || null,
   };
 }
@@ -636,7 +637,6 @@ export function getPipeDef<T>(type: any): PipeDef<T> | null {
  */
 export function isStandalone(type: Type<unknown>): boolean {
   const def = getComponentDef(type) || getDirectiveDef(type) || getPipeDef(type);
-  // TODO: standalone as default value (invert the condition)
   return def !== null ? def.standalone : false;
 }
 
@@ -665,8 +665,7 @@ function getNgDirectiveDef<T>(directiveDefinition: DirectiveDefinition<T>): Dire
     inputTransforms: null,
     inputConfig: directiveDefinition.inputs || EMPTY_OBJ,
     exportAs: directiveDefinition.exportAs || null,
-    // TODO: standalone as default value (invert the condition)
-    standalone: directiveDefinition.standalone === true,
+    standalone: directiveDefinition.standalone ?? NG_STANDALONE_DEFAULT_VALUE,
     signals: directiveDefinition.signals === true,
     selectors: directiveDefinition.selectors || EMPTY_ARRAY,
     viewQuery: directiveDefinition.viewQuery || null,

packages/core/test/acceptance/copy_definition_feature_spec.ts

@@ -45,6 +45,7 @@ describe('CopyDefinitionFeature', () => {
       static override ɵcmp = defineComponent({
         type: ChildComponent,
         selectors: [['some-cmp']],
+        standalone: false,
         features: [InheritDefinitionFeature, CopyDefinitionFeature],
         decls: 0,
         vars: 0,

packages/core/test/acceptance/standalone_spec.ts

@@ -922,6 +922,13 @@ describe('standalone components, directives, and pipes', () => {
 
   describe('isStandalone()', () => {
     it('should return `true` if component is standalone', () => {
+      @Component({selector: 'standalone-cmp'})
+      class StandaloneCmp {}
+
+      expect(isStandalone(StandaloneCmp)).toBeTrue();
+    });
+
+    it('should return `true` if component is standalone (with `standalone:true`)', () => {
       @Component({selector: 'standalone-cmp', standalone: true})
       class StandaloneCmp {}