Angular 2 pipe that transforms JSON object to pret

问题:

Trying to write an Angular 2 pipe that will take a JSON object string and return it pretty-printed/formatted to display to the user.

For example, it would take this:

{ "id": 1, "number": "K3483483344", "state": "CA", "active": true }

And return something that looks like this when displayed in HTML:

So in my view I could have something like:

<td> {{ record.jsonData | prettyprint }} </td>

回答1:

I would like to add an even simpler way to do this, using the built-in json pipe:

<pre>{{data | json}}</pre>

This way, the formatting is preserved.

回答2:

I would create a custom pipe for this:

@Pipe({
  name: 'prettyprint'
})
export class PrettyPrintPipe implements PipeTransform {
  transform(val) {
    return JSON.stringify(val, null, 2)
      .replace(' ', ' ')
      .replace('\n', '<br/>');
  }
}

and use it this way:

@Component({
  selector: 'my-app',
  template: `
    <div [innerHTML]="obj | prettyprint"></div>
  `,
  pipes: [ PrettyPrintPipe ]
})
export class AppComponent {
  obj = {
    test: 'testttt',
    name: 'nameeee'
  }
}

See this stackblitz: https://stackblitz.com/edit/angular-prettyprint