TemplateUrl, StyleUrl and StyleUrls absolute path not working anymore

[Loic-fr]

Which @angular/* package(s) are the source of the bug?

Don't known / other

Is this a regression?

Yes

Description

With Angular 17, we used to use absolute path for TemplateUrl, StyleUrl and/or StyleUrls to allow sharing of templates and style between components by using :
templateUrl: '/src/app/shared/some.component.html',

Since Angular 19, these paths don't work anymore and we had to use a lot of ../ to point to the file we need.

Angular documentation seem to indicate absolute paths should be possible :
https://angular.dev/api/core/Component#templateUrl

Please provide a link to a minimal reproduction of the bug

https://stackblitz.com/edit/stackblitz-starters-54tuykux?file=tsconfig.json

Please provide the exception or error you saw

TS-992008: Could not find stylesheet file '/src/app/shared/some.component.css'
and
TS-992008: Could not find template file '/src/app/shared/some.component.html'

Please provide the environment you discovered this bug in (run ng version)

Angular CLI: 19.2.1
Node: 20.11.1
Package Manager: npm 10.2.4
OS: win32 x64

Angular: 19.2.1
... animations, build, cli, common, compiler, compiler-cli, core
... forms, language-service, platform-browser
... platform-browser-dynamic, router, service-worker

Package                      Version
------------------------------------------------------
@angular-devkit/core         19.2.1
@angular-devkit/schematics   19.2.1
@angular/cdk                 19.2.2
@schematics/angular          19.2.1
rxjs                         7.8.2
typescript                   5.8.2
zone.js                      0.15.0

Anything else?

No response

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}