animations: ensure consistent transition namespace ordering (#19854) (01cc995)
animations: update supported range of node versions to only include LTS versions (#41822) (e918250)
animations: cleanup DOM elements when the root view is removed (#41059) (c49b280)
animations: allow animations on elements in the shadow DOM (#40134) (dad42c8), closes #25672
animations: cleanup DOM elements when the root view is removed (#41001) (a31da48)
bazel: update supported range of node versions to only include LTS versions (#41822) (8503246)
bazel: update build tooling for latest changes in rules_nodejs (#40710) (696f7bc)
bazel: update integration test to use [email protected] (#40710) (34de89a)
bazel: update type castings for JSON.parse usage (#40710) (2c90391)
benchpress: update type castings for JSON.parse usage (#40710) (e721a5d)
common: add right ContentType for boolean values with HttpClient request body(#38924) (#41885) (922a602)
common: update supported range of node versions to only include LTS versions (#41822) (f2b6fd8)
common: viewport scroller not finding elements inside the shadow DOM (#41644) (c0f5ba3), closes #41470
common: temporarily re-export and deprecate XhrFactory (#41393) (7dfa446)
common: cleanup location change listeners when the root view is removed (#40867) (38524c4), closes #31546
common: allow number or boolean as http params (#40663) (91cdc11), closes #23856
common: avoid mutating context object in NgTemplateOutlet (#40360) (d3705b3), closes #24515
compiler: preserve @page rules in encapsulated styles (#41915) (3e365ba), closes #26269
compiler: strip scoped selectors from @font-face rules (#41815) (2a11cda), closes #41751
compiler: update supported range of node versions to only include LTS versions (#41822) (bae8126)
compiler: non-literal inline templates incorrectly processed in partial compilation (#41583) (ab257b3)
compiler: not generating update instructions for ng-template inside alternate namespaces (#41669) (2bcbbda), closes #41308
compiler: avoid parsing EmptyExpr with a backwards span (#41581) (e1a2930)
compiler: handle case-sensitive CSS custom properties (#41380) (e112e32), closes #41364
compiler: include used components during JIT compilation of partial component declaration (#41353) (ff9470b), closes #41104 #41318
compiler: support multiple :host-context() selectors (#40494) (07b7af3), closes #19199
compiler: update type castings for JSON.parse usage (#40710) (f728490)
compiler-cli: use '' for the source map URL of indirect templates (#41973) (7a4d980), closes #40854
compiler-cli: expose the linker as a Babel plugin (#41918) (8fdac8f)
compiler-cli: prefer non-aliased exports in reference emitters (#41866) (75bb931), closes #41443 #41277
compiler-cli: allow linker to process minified booleans (#41747) (1fb6724), closes #41655
compiler-cli: match string indexed partial declarations (#41747) (f885750), closes #41655
compiler-cli: update supported range of node versions to only include LTS versions (#41822) (5b463f4)
compiler-cli: autocomplete literal types in templates. (#41456) (#41645) (8b2b5ef)
compiler-cli: do not error with prepocessing if component has no inline styles (#41602) (a5fe8b9)
compiler-cli: ensure the compiler tracks ts.Programs correctly (#41291) (deacc74)
compiler-cli: prevent eliding default imports in incremental recompilations (#41557) (7f16515), closes #41377
compiler-cli: resolve rootDirs to absolute (#41359) (3e0fda9), closes #36290
compiler-cli: add useInlining option to type check config (#41043) (09aefd2), closes #40963
compiler-cli: readConfiguration existing options should override options in tsconfig (#40694) (b7c4d07)
compiler-cli: extend angularCompilerOptions in tsconfig from node (#40694) (5eb1954), closes #36715
compiler-cli: update ngcc integration tests for latest changes in rules_nodejs (#40710) (d7f5755)
compiler-cli: update type castings for JSON.parse usage (#40710) (b75d7cb)
core: do not retain dynamically compiled components and modules (#42003) (1449c5c), closes #19997
core: invoke profiler around ngOnDestroy lifecycle hooks (#41969) (e9ddc57)
core: AsyncPipe now compatible with RxJS 7 (#41590) (9759bca)
core: handle multiple i18n attributes with expression bindings (#41882) (73c6c64), closes #41869
core: update supported range of node versions to only include LTS versions (#41822) (f9c1f08)
core: detect synthesized constructors that have been downleveled using TS 4.2 (#41305) (274dc15), closes #41298
core: Switch emitDistinctChangesOnlyDefaultValue to true (#41121) (7096246)
core: remove duplicated EMPTY_OBJ constant (#41066) (bf158e7)
core: remove duplicated EMPTY_ARRAY constant (#40991) (e12d9de)
core: allow EmbeddedViewRef context to be updated (#40360) (a3e1719), closes #24515
core: make DefaultIterableDiffer keep the order of duplicates (#23941) (a826926), closes #23815
core: NgZone coaleascing options should trigger onStable correctly (#40540) (22f9e45)
elements: update supported range of node versions to only include LTS versions (#41822) (4f5d094)
elements: update type castings for JSON.parse usage (#40710) (efd4149)
forms: update supported range of node versions to only include LTS versions (#41822) (dc975ba)
http: complete the request on timeout (#39807) (61a0b6d), closes #26453
http: emit error on XMLHttpRequest abort event (#40767) (3897265), closes #22324
language-service: update supported range of node versions to only include LTS versions (#41822) (9b6198c)
language-service: use script versions for incremental compilations (#41475) (78236bf)
language-service: Only provide Angular property completions in templates (#41278) (0226a11)
language-service: Add plugin option to force strictTemplates (#41062) (e9e7c33)
language-service: use single entry point for Ivy and View Engine (#40967) (e986a97)
localize: relax error to warning for missing target (#41944) (35ceed2), closes #21690
localize: update supported range of node versions to only include LTS versions (#41822) (658ed1f)
localize: update type castings for JSON.parse usage (#40710) (4b469c9)
ngcc: detect synthesized constructors that have been downleveled using TS 4.2 (#41305) (8d3da56), closes #41298
platform-browser: prevent memory leak of style nodes if shadow DOM encapsulation is used (#42005) (d555555), closes #36655
platform-browser: update supported range of node versions to only include LTS versions (#41822) (ea05cfd)
platform-browser: configure XhrFactory to use BrowserXhr (#41313) (e0028e5), closes #41311
platform-browser: update type castings for JSON.parse usage (#40710) (7ecfd2d)
platform-browser-dynamic: update supported range of node versions to only include LTS versions (#41822) (bc45029)
platform-server: update supported range of node versions to only include LTS versions (#41822) (4b9d4fa)
router: update supported range of node versions to only include LTS versions (#41822) (0067edd)
router: Only retrieve stored route when reuse strategy indicates it should reattach (#30263) (a4ff071), closes #23162
router: recursively merge empty path matches (#41584) (1179dc8), closes #41481
router: fragment can be null (#37336) (b555160), closes #23894 #34197
router: update type castings for JSON.parse usage (#40710) (350dada)
service-worker: update supported range of node versions to only include LTS versions (#41822) (6b823d7)
service-worker: update type castings for JSON.parse usage (#40710) (4f7ff96)
upgrade: preserve $interval.flush when ngMocks is being used (#30229) (87dc851)
upgrade: update supported range of node versions to only include LTS versions (#41822) (10c4523)

Build System

ng_package no longer generate minified UMDs (#41425) (5a8bc1b)

Features

animations: update supported range of node versions (#41544) (547363a)
animations: add support for disabling animations through BrowserAnimationsModule.withConfig (#40731) (29d8a0a)
bazel: update supported range of node versions (#41544) (d583d92)
common: update supported range of node versions (#41544) (e0250e5)
common: add historyGo method to Location service (#38890) (e05a6f3)
common: support ICU standard "stand alone day of week" with DatePipe (#40766) (c56ecab), closes #26922
common: implement appendAll() method on HttpParams (#20930) (575a2d1), closes #20798
compiler: support nullish coalescing in templates (#41437) (ec27bd4), closes #36528
compiler: update supported range of node versions (#41544) (75cc813)
compiler: emit @PURE or @pureOrBreakMyCode annotations in the generated code (#41096) (9c21028)
compiler-cli: mark ability to use partial compilation mode as stable (#41518) (6ba67c6), closes #41496
compiler-cli: update supported range of node versions (#41544) (b7bd238)
compiler-cli: support transforming component style resources (#41307) (1de04b1)
compiler-cli: support producing Closure-specific PURE annotations (#41021) (fbc9df1)
core: introduce getDirectiveMetadata global debugging utility (#41525) (a07f303)
core: update supported range of node versions (#41544) (e66a5fb)
core: support forwardRef in providedIn of Injectable declaration (#41426) (f7c294e), closes #41205
core: add migration for XhrFactory import (#41313) (95ff5ec)
core: drop support for TypeScript 4.0 and 4.1 (#41158) (fa04894)
core: support TypeScript 4.2 (#41158) (59ef409)
core: manually annotate de-sugarred core tree-shakable providers with @pureOrBreakMyCode (#41096) (03d47d5)
core: more precise type for APP_INITIALIZER token (#40986) (ca721c2), closes #40729
core: drop support for zone.js 0.10.x (#40823) (aaf9b31), closes angular/angular-cli#20034
core: support APP_INITIALIZER work with observable (#33222) (ca17ac5), closes #15088
elements: update supported range of node versions (#41544) (12fc08b)
forms: update supported range of node versions (#41544) (a0006a6)
forms: add emitEvent option for AbstractControl-based class methods (#31031) (4ec045e), closes #29662
forms: introduce min and max validators (#39063) (8fb83ea), closes #16352
http: introduce HttpContext request context (#25751) (1644d64)
http: expose a list of human-readable http status codes (#23548) (6fe3a1d), closes #23543
language-service: implement signature help (#41581) (c7f9516)
language-service: update supported range of node versions (#41544) (86621be)
language-service: add perf tracing to LanguageService (#41319) (90f85da)
language-service: add command for getting components for a template file (#40655) (5cde4ad)
language-service: Add diagnostics to suggest turning on strict mode (#40423) (ecae75f)
language-service: Implement getRenameInfo (#40439) (4e8198d)
language-service: initial implementation for findRenameLocations (#40140) (9a5ac47)
language-service: view template typecheck block (#39974) (d482f5c)
localize: update supported range of node versions (#41544) (590d4dd)
localize: add scripts to migrate away from legacy message IDs (#41026) (1735430)
ngcc: support __read helper as used by TypeScript 4.2 (#41201) (66e9970)
ngcc: support __spreadArray helper as used by TypeScript 4.2 (#41201) (7b1214e) #40394
platform-browser: update supported range of node versions (#41544) (ef0d1c3)
platform-browser-dynamic: update supported range of node versions (#41544) (b714f7b)
platform-server: update supported range of node versions (#41544) (c901b4d)
platform-server: allow shimming the global env sooner (#40559) (43ecf8a), closes #24551 #39950 #39950
router: update supported range of node versions (#41544) (c30b171)
router: add migration for ActivatedRouteSnapshot.fragment (#41092) (190fa07), closes #37336
router: Add more fine-tuned control in routerLinkActiveOptions (#40303) (6c05c80), closes #13205
router: Allow for custom router outlet implementations (#40827) (a82fddf)
service-worker: update supported range of node versions (#41544) (fc597f1)
upgrade: update supported range of node versions (#41544) (beafa22)

Performance Improvements

common: remove unused methods from DomAdapter (#41102) (3c66b10)
compiler: reduce amount of generated code for safe accesses and nullish coalescing (#41563) (9a3b82f), closes #41437 #41491
compiler-cli: allow incremental compilation in the presence of redirected source files (#41448) (ffea31f)
compiler-cli: cache results of absoluteFromSourceFile (#41475) (fab1a64)
core: minor improvements to listener instructions (#41807) (9346d61)
core: avoid storing LView in ngContext (#41358) (990067a), closes #41047
core: optimize getDirectives (#41525) (f7e391a)

BREAKING CHANGES

Minified UMD bundles are no longer included in the distributed NPM packages.
animations: DOM elements are now correctly removed when the root view is removed. If you are using SSR and use the app's HTML for rendering, you will need to ensure that you save the HTML to a variable before destorying the app. It is also possible that tests could be accidentally relying on the old behavior by trying to find an element that was not removed in a previous test. If this is the case, the failing tests should be updated to ensure they have proper setup code which initializes elements they rely on.
common: Methods of the PlatformLocation class, namely onPopState and onHashChange, used to return void. Now those methods return functions that can be called to remove event handlers.
common: The methods of the HttpParams class now accept string | number | boolean instead of string for the value of a parameter. If you extended this class in your application, you'll have to update the signatures of your methods to reflect these changes.
compiler-cli: Linked libraries no longer generate legacy i18n message ids. Any downstream application that provides translations for these messages, will need to migrate their message ids using the localize-migrate command line tool.
core: Angular no longer maintains support for node v10
core: Previously the ng.getDirectives function threw an error in case a given DOM node had no Angular context associated with it (for example if a function was called for a DOM element outside of an Angular app). This behavior was inconsistent with other debugging utilities under ng namespace, which handled this situation without raising an exception. Now calling the ng.getDirectives function for such DOM nodes would result in an empty array returned from that function.
core: Switching default of emitDistinctChangesOnlyDefaultValue which changes the default behavior and may cause some applications which rely on the incorrect behavior to fail.

emitDistinctChangesOnly flag has also been deprecated and will be removed in a future major release.

The previous implementation would fire changes QueryList.changes.subscribe whenever the QueryList was recomputed. This resulted in an artificially high number of change notifications, as it is possible that recomputing QueryList results in the same list. When the QueryList gets recomputed is an implementation detail, and it should not be the thing that determines how often change event should fire.

Unfortunately, fixing the behavior outright caused too many existing applications to fail. For this reason, Angular considers this fix a breaking fix and has introduced a flag in @ContentChildren and @ViewChildren, that controls the behavior.

export class QueryCompWithStrictChangeEmitParent {
  @ContentChildren('foo', {
    // This option is the new default with this change.
    emitDistinctChangesOnly: true,
  })
  foos!: QueryList<any>;
}

For backward compatibility before v12 emitDistinctChangesOnlyDefaultValue was set to false. This change changes the default to true. * core: The type of the APP_INITIALIZER token has been changed to more accurately reflect the types of return values that are handled by Angular. Previously, each initializer callback was typed to return any, this is now Promise<unknown> | Observable<unknown> | void. In the unlikely event that your application uses the Injector.get or TestBed.inject API to inject the APP_INITIALIZER token, you may need to update the code to account for the stricter type.

Additionally, TypeScript may report the TS2742 error if the APP_INITIALIZER token is used in an expression of which its inferred type has to be emitted into a .d.ts file. To workaround this, an explicit type annotation is needed, which would typically be Provider or Provider[]. * core: Minimum supported zone.js version is 0.11.4 * forms: The emitEvent option was added to the following FormArray and FormGroup methods:

FormGroup.addControl
FormGroup.removeControl
FormGroup.setControl
FormArray.push
FormArray.insert
FormArray.removeAt
FormArray.setControl
FormArray.clear

If your app has custom classes that extend FormArray or FormGroup classes and override the above-mentioned methods, you may need to update your implementation to take the new options into account and make sure that overrides are compatible from a types perspective. * forms: Previously min and max attributes defined on the <input type="number"> were ignored by Forms module. Now presence of these attributes would trigger min/max validation logic (in case formControl, formControlName or ngModel directives are also present on a given input) and corresponding form control status would reflect that. * platform-browser: XhrFactory has been moved from @angular/common/http to @angular/common.

Before ts import {XhrFactory} from '@angular/common/http';

After ts import {XhrFactory} from '@angular/common';

router: Strict null checks will report on fragment potentially being null. Migration path: add null check.
router: The type of the RouterLinkActive.routerLinkActiveOptions input was expanded to allow more fine-tuned control. Code that previously read this property may need to be updated to account for the new type.