18.0.0-next.2 (2024-03-28)

compiler

Commit	Description
	capture all control flow branches for content projection in if blocks (#54921)
	capture switch block cases for content projection (#54921)
	declare for loop aliases in addition to new name (#54942)
	invoke method-based tracking function with context (#54960)
	throw error if item name and context variables conflict (#55045)

compiler-cli

Commit	Description
	add partial compilation support for deferred blocks (#54908)
	drop support for TypeScript older than 5.4 (#54961)
	add diagnostic if initializer API is used outside of an initializer (#54993)
	report cases where initializer APIs are used in a non-directive class (#54993)
	report errors when initializer APIs are used on private fields (#54981)

core

Commit	Description
	add support for fallback content in ng-content (#54854)
	ComponentFixture stability should match ApplicationRef (#54949)
	account for re-projected ng-content elements with fallback content (#54854)
	correctly project single-root content inside control flow (#54921)
	establish proper injector resolution order for @defer blocks (#55079)
	Fix clearing of pending task in zoneless cleanup implementation (#55074)

http

Commit	Description
	include transferCache when cloning HttpRequest (#54939)
	manage different body types for caching POST requests (#54980)

language-service

Commit	Description
	allow external projects to use provided compiler options (#55035)
	prevent underlying TS Service from handling template files (#55003)

migrations

Commit	Description
	account for variables in imports initializer (#55081)

router

Commit	Description
	preserve replaceUrl when returning a urlTree from CanActivate (#54042)
	RouterLinkActive will always remove active classes when links are not active (#54982)

Breaking Changes

compiler-cli

• • Angular no longer supports TypeScript versions older than 5.4.

core

• ComponentFixture.whenStable now matches the
  ApplicationRef.isStable observable. Prior to this change, stability
  of the fixture did not include everything that was considered in
  ApplicationRef. whenStable of the fixture will now include unfinished
  router navigations and unfinished HttpClient requests. This will cause
  tests that await the whenStable promise to time out when there are
  incomplete requests. To fix this, remove the whenStable,
  instead wait for another condition, or ensure HttpTestingController
  mocks responses for all requests. Try adding HttpTestingController.verify()
  before your await fixture.whenStable to identify the open requests.
  Also, make sure your tests wait for the stability promise. We found many
  examples of tests that did not, meaning the expectations did not execute
  within the test body.

  In addition, ComponentFixture.isStable would synchronously switch to
  true in some scenarios but will now always be asynchronous.

router

• When a a guard returns a UrlTree as a redirect, the
  redirecting navigation will now use replaceUrl if the initial
  navigation was also using the replaceUrl option. If this is not
  desirable, the redirect can configure new NavigationBehaviorOptions by
  returning a RedirectCommand with the desired options instead of UrlTree.