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[英]Angular2 RC5: Can't bind to 'Property X' since it isn't a known property of 'Child Component'
[英]External Module in RC5: Can't bind to 'X' since it isn't a known property
在更新RC4 => RC5的過程中,已將幾個組件拉入模塊。 現在,得到一個運行時錯誤: Unhandled Promise rejection: Template parse errors: Can't bind to 'X' since it isn't a known property of 'Y'
。
@NgModule()
裝飾器的declarations
屬性中,則它將起作用。 @NgModule()
的imports
屬性中時, @NgModule()
此錯誤。 這是一個笨拙的人 。
外部模塊代碼
export class ExampleConfig {
public name: string;
}
@Component({
selector: 'example',
template: '<strong>{{ config?.name }}</strong>'
})
export class ExampleComponent {
@Input() config: ExampleConfig;
}
@NgModule({
declarations: [ExampleComponent]
})
export class ExampleModule {}
應用模塊代碼
@Component({
selector: 'my-app',
template: '<h2>Hello <example [config]="exampleConfig"></example></h2>'
})
export class App {
constructor() {
this.exampleConfig = new ExampleConfig();
this.exampleConfig.name = 'World';
}
protected exampleConfig: ExampleConfig;
}
@NgModule({
imports: [BrowserModule, ExampleModule],
declarations: [App],
bootstrap: [App]
})
export class AppModule {}
在material2源代碼中進行挖掘,似乎您必須將組件添加到模塊裝飾器的exports
屬性中:
@NgModule({
declarations: [ExampleComponent],
exports: [ExampleComponent]
})
export class ExampleModule {}
無法綁定到“ X”,因為它不是已知屬性
如果看到此錯誤,請確保您的引導模塊文件中未包含組件,請執行以下操作
如果您有3個組件
1. app.component.ts
2. greeting.service.ts
3. hello.ts
然后在您的主引導文件中包含以下所有內容
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } '@angular/core';
import { MyApp } from './app.component'
import {Welcome} from './services/welcome';
import {Hello} from './hello.component';
@NgModule({
imports: [BrowserModule],
providers:[Welcome],
declarations: [MyApp
,Hello
],
bootstrap: [MyApp]
})
export class MyAppModule {
}
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