使用輸入輸出練習設置項目

Question

我有以下代碼，我將在GitHub上發佈。

我收到一個錯誤說：

Can't export directive ParentComponent from ParentModule as it was neither declared nor imported! 

項目結構：

app.module.ts

@NgModule({ 
    declarations: [], 
    imports: [ 
     BrowserModule, 
     ChildModule, 
     ParentModule, 
     HomeModule 
    ], 
    providers: [], 
    bootstrap: [HomeComponent] 
}) 
export class AppModule { } 

parent.ts

@NgModule({ 
    declarations: [], 
    imports: [ 
     CommonModule 
    ], 
    exports: [ParentComponent ], 
    providers: [], 

}) 
export class ParentModule { } 

個

child.ts

@NgModule({ 
    declarations: [ 
     ChildComponent 
    ], 
    imports: [ 
     CommonModule 
    ], 
    exports: [ChildComponent], 
    providers: [], 

}) 
export class ChildModule {} 

現在我多麼想成爲home和默認頁面：你需要做兩件事declar和出口GitHub

Answer 1

：

@NgModule({ 
    declarations: [], 
    imports: [ 
     CommonModule 
    ], 
    exports: [], 
    providers: [], 

}) 
export class HomeModule { } 

Git的鏈接對於父模塊以及您爲chield所做的操作

parent.ts 

@NgModule({ 
    declarations: [ParentComponent], 
    imports: [ 
     CommonModule 
    ], 
    exports: [ParentComponent ], 
    providers: [], 

}) 
export class ParentModule { }