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Accepted
liberlux
Asked: 2023-08-17 21:53:20 +0800 CST

无法在 app.component.html 中呈现自定义组件

  • 772

我创建了一个名为 的自定义组件core.component，并将其导入到同名的模块中。

core.component.html

<div class="container-fluid text-left">
    <div class="row rows-cols-2 top-bar">
      <div>
        <h1>[Title]</h1>
      </div>
      <div class="w-100"></div>
      <div>
        <h4>[Subtitle]</h4>
      </div>
    </div>
  
    <div class="row align-baseline side-panel">
      <div class="col-3">
        <nav class="navbar bg-body-tertiary">
          <a class="navbar-brand" href="#">Option 1</a>
        </nav>
        <nav class="navbar bg-body-tertiary">
          <a class="navbar-brand" href="#">Option 2</a>
        </nav>
      </div>
      <div class="col-9">
      </div>
    </div>
  </div>

核心组件.ts

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-core',
  templateUrl: './core.component.html',
  styleUrls: ['./core.component.scss']
})
export class CoreComponent implements OnInit {

  constructor() { }

  ngOnInit(): void {
  }

}

核心模块.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { CoreComponent } from './core.component';

@NgModule({
  declarations: [
    CoreComponent
  ],
  imports: [
    CommonModule
  ]
})
export class CoreModule { }

最后，我将核心模块导入到我的根应用程序模块中，以便我可以在元素中显示它<app-root>。

应用程序模块.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

import { CoreModule } from './core/core.module';


@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    CoreModule  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

应用程序组件.html

<app-core></app-core>

不幸的是，编译器没有渲染核心组件 HTML，而是返回以下消息，指出它无法识别我通过核心模块导入的组件。

Error: src/app/app.component.html:2:1 - error NG8001: 'app-core' is not a known element:
1. If 'app-core' is an Angular component, then verify that it is part of this module.
2. If 'app-core' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

2 <app-core></app-core>
  ~~~~~~~~~~
angular

1 个回答

  1. Best Answer

    您需要CoreComponent从core.module.ts “导出” ：

    import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { CoreComponent } from './core.component';

@NgModule({
  declarations: [CoreComponent],
  imports: [CommonModule],
  exports: [CoreComponent],
})
export class CoreModule {}

    代码沙箱

    • 1

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