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Angular: Emit decorator metadata by default #9701

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merged 2 commits into from Feb 3, 2020

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kroeder
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@kroeder kroeder commented Feb 2, 2020

Issue: #7544

What I did

I added emitDecoratorMetadata: true as default value to the ts compiler options. Angular dependency injection does not work correctly without it

How to test

  • ng new test-app
  • sb init
  • create demo component with
@Component({
  selector: 'app-test',
  template: 'test.component.html'
})

export class TestComponent implements OnInit {
  constructor(private elementRef: ElementRef) {
    console.log(elementRef);
  }

  ngOnInit() {
  }
}
  • add this component to a story
  • It should fail now.
  • modify ts_config.js in node_modules/@storybook/angular/server/ts_config.js
function default_1(configDir) {
    var configFilePath = resolveTsConfig(path_1.default.resolve(configDir, 'tsconfig.json'));
    return {
        transpileOnly: true,
        compilerOptions: {
          emitDecoratorMetadata: true
        },
        configFile: configFilePath || undefined,
    };
}
  • it should work now

This fixes dependency injection error SomeComponent(?, ?)
@shilman shilman added the patch:yes Bugfix & documentation PR that need to be picked to main branch label Feb 3, 2020
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LGTM!

@shilman
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shilman commented Feb 3, 2020

@kroeder can you update the failing test?

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kroeder commented Feb 3, 2020

I can. Haven't seen the failing tests because of the permanent false-positive A11y 😞

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