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Template type checking re-builds do not run correctly when referencing a re-exported type

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評估

難度
4/5
預估耗時
3-5 天
新手友好度
35/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
angular, typescript
領域
build-system

研究方向

從連結的最小重現開始,並在所述的 Angular 和 Node 版本上啟用範本型別檢查執行 ng serve。在 abc 和 abcd 定義之間切換 MyType,然後檢查 Angular CLI 重建和範本型別檢查路徑。還原型別定義後,如果重建時的範本錯誤被移除,即表示完成。

由索引模型根據 Issue 內容生成。

描述

area: @ngtools/webpack needs: investigation
Which @angular/* package(s) are the source of the bug?

Don't known / other

Is this a regression?

Yes

Description

Consider the following example, running ng serve with template type checking turned on:

  • An Angular template references a property on the component class in an expression.
  • This component class properties type definition comes from a file which re-exports the type definition from another file.
  • Re-builds do not always re-compile the template expression when they should.

More specifically, in the reproduction repo this looks as follows:

  • The app component template includes an expression: {{ myType?.abc }}.
  • The app component class defines the myType property: myType?: MyTypeReExported.
  • The type of the myType property comes from a file which re-exports another type. export type MyTypeRexported = MyType.
  • The type MyType comes from a file which defines the definition as: export interface MyType { abc: 123; }.
  • The initial ng serve will run without errors.
  • Changing the type definition of MyType to be export interface MyType { abcd: 123; } causes an error in the app component's template. This is seen in the re-build console output. This is the correct behaviour.
  • Changing the type definition back to what it was originally should remove the error. However, it does not. That is the bug.
Please provide a link to a minimal reproduction of the bug

https://github.com/HazzMan2409/angular-template-rebuild-bug

Please provide the environment you discovered this bug in
Angular 12.2.5.
Node 14.17.6

See the package.json on the repo for more details. At the time 12.2.5 was the latest version.
主要語言
TypeScript
星號
27k
分支
11.8k
平均合併
17 小時 21 分鐘
30 天內合併 PR
181

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