使用来自本地 json 文件的 html 中的数据 - typescript, angular 7

Question

我想在我的 Angular 7 项目中导入一个简单的本地 json 文件并使用我的 HTML 文件中的数据。只是一个简单的例子。我已将 json 文件附加为 data.json。我想在 app.component.html 中访问这个 json 文件中的数据，而不是 {{item}}

app.component.ts

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  @ViewChild('detailsPanel') details;
  @ViewChild('displayDetails') displayDetails;


  // Need to access this data from a json file
  title = 'dragNdrop';
  todo = [
    'Get to work',
    'Pick up groceries',
    'Go home',
    'Fall asleep'
  ];

  done = [
    'Get up',
    'Brush teeth',
    'Take a shower',
    'Check e-mail',
    'Walk dog'
  ];

  elementDetails = "";

  drop(event: CdkDragDrop<string[]>) {
    if (event.previousContainer === event.container) {
      moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
    } else {
      transferArrayItem(event.previousContainer.data,
                        event.container.data,
                        event.previousIndex,
                        event.currentIndex);
    }
  }

  showDetails(text){
    this.elementDetails = text;
  }
}

app.component.html

<div class="container-fluid" style="padding: 2%;">
  <div class="row">
    <div class="col-md-3">
      <h2>Drag and Drop</h2>
    </div>
  </div>

  <div class="row">
    <div class="col-md-3" style="border-right: 1px solid black; height: 100%;">
      <div cdkDropList #todoList="cdkDropList" [cdkDropListData]="todo" [cdkDropListConnectedTo]="[doneList]"
        class="example-list" (cdkDropListDropped)="drop($event)">
        <div class="example-box" *ngFor="let item of todo" cdkDrag>{{item}}</div>
      </div>
    </div>

    <div class="col-md-6">
      <div cdkDropList #doneList="cdkDropList" [cdkDropListData]="done" [cdkDropListConnectedTo]="[todoList]"
        class="example-list" (cdkDropListDropped)="drop($event)">
        <p #detailsPanel class="example-box" *ngFor="let item of done" (click)="showDetails(detailsPanel.innerText)" cdkDrag>{{item}}</p>
      </div>
    </div>

data.json

{
    "list1": [
        "A",
        "B",
        "C",
        "D"
    ]
}

Answer 1

1. 在

tsconfig.json

添加到“compilerOptions”中：

    "compilerOptions": 
    {
        "resolveJsonModule": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true
} 

1. 现在您可以将数据从 JSON 导入

你的组件文件.ts

因此：

import { yourObject } from './data/yourJSON.json'

1. 使用

   dataImportedFromMyJson: any[] = yourObject;