Template type checking re-builds do not run correctly when referencing a re-exported type
- 主要言語
- TypeScript
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- 平均マージ
- 14時間 23分
- マージ済み PR(30日)
- 162
説明
### 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
```true
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.
```
コントリビューションガイド
調査の方向性
リンクされた最小再現から始め、指定された Angular と Node のバージョンで template type checking を有効にして ng serve を実行します。MyType を abc と abcd の定義の間で変更し、その後 Angular CLI の rebuild と template type checking のパスを調査します。型定義を元に戻すことで rebuild 時に template のエラーが削除されれば完了です。
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- angular, typescript
- 領域
- build-system
- issue の種類
- バグ
- 難易度
- 4/5
- 見積もり時間
- 3〜5日
- 活発さ
- 停滞
- 明瞭さ
- おおむね明確
- 初心者へのやさしさ
- 35/100