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

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
angular, typescript
领域
build-system

调研方向

从链接的最小复现开始,并在所述的 Angular 和 Node 版本上启用模板类型检查运行 ng serve。在 abc 和 abcd 定义之间切换 MyType,然后检查 Angular CLI 重建和模板类型检查路径。恢复类型定义后,如果重建时的模板错误被移除,即表示完成。

由索引模型根据 Issue 内容生成。

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.
主要语言
TypeScript
星标
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派生
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平均合并
16 小时 35 分钟
30 天内合并 PR
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