angular/packages/compiler-cli/ngcc/test/integration
Kristiyan Kostadinov 54ceed53e2 refactor(compiler): add support for host directives (#46868)
This is the compile-time implementation of the `hostDirectives` feature plus a little bit of runtime code to illustrate how the newly-generated code will plug into the runtime. It works by creating a call to the new `ɵɵHostDirectivesFeature` feature whenever a directive has a `hostDirectives` field. Afterwards `ɵɵHostDirectivesFeature` will patch a new function onto the directive definition that will be invoked during directive matching.

For example, if we take the following definition:

```ts
@Directive({
  hostDirectives: [HostA, {directive: HostB, inputs: ['input: alias']}]
})
class MyDir {}
```

Will compile to:

```js
MyDir.ɵdir = ɵɵdefineComponent({
  features: [ɵɵHostDirectivesFeature([HostA, {
    directive: HostB,
    inputs: {
      input: "alias"
    }
  }])]
});
```

The template type checking is implemented during directive matching by adding the host directives applied on the host to the array of matched directives whenever the host is matched in a template.

Relates to #8785.

PR Close #46868
2022-08-22 16:00:35 -07:00
..
ngcc_spec.ts refactor(compiler): add support for host directives (#46868) 2022-08-22 16:00:35 -07:00
util.ts test(ngcc): don't use the workspace typescript version to generate integration test fixtures (#44448) 2021-12-14 16:08:28 -05:00