This commit introduces //packages/compiler-cli/src/ngtsc/typecheck as a container for template type-checking code, and implements an initial API: type constructor generation. Type constructors are static methods on component/directive types with no runtime implementation. The methods are used during compilation to enable inference of a component or directive's generic type parameters from the types of expressions bound to any of their @Inputs. A type constructor looks like: class Directive<T> { someInput: T; static ngTypeCtor<T>(init: Partial<Pick<Directive<T>, 'someInput'>>): Directive<T>; } It can be used to infer a type for T based on the input: const _dir = Directive.ngTypeCtor({someInput: 'string'}); // Directive<T> PR Close #26203
Angular
Angular is a development platform for building mobile and desktop web applications using Typescript/JavaScript and other languages.
Quickstart
Changelog
Learn about the latest improvements.
Want to help?
Want to file a bug, contribute some code, or improve documentation? Excellent! Read up on our guidelines for contributing and then check out one of our issues in the hotlist: community-help.
Languages
TypeScript
68.6%
HTML
12.8%
JavaScript
8.4%
Pug
7%
Starlark
1.4%
Other
1.7%