Angular 2 Pretty Json

A module for Angular 2 debug output of objects. Contains a pipe similar to JsonPipe but adds support for spacing and handling of circular structures.
Also contains a component that outputs any object with syntax highlight.
Warning: just as the JsonPipe, this is an impure pipe and should be used only for debugging purposes.

Install

npm install @talentia/angular2-prettyjson

Usage

Import PrettyJsonModule to have access to the component and pipes

import {PrettyJsonModule} from '@talentia/angular2-prettyjson';

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

Safe Pipe

The SafeJsonPipe aims to override the JsonPipe and so uses the same name "json". It also accepts an optional argument spaces=2 for the JSON stringify spacing.

@Component({
  ....
  template: `
    <pre>
    {{ circularObj | json }}
    {{ circularObj | json:4 }}
    </pre>
  ` // make sure to use a surrounding element with white-space: pre; for best results
  })
  ...

outputs

2 spaces (default):

4 spaces:

Pretty (and safe) Pipe

The PrettyJsonPipe stringifies the object and then adds spans around properties, null, arrays etc. You can bind it to the innerHtml of other elements.

@Component({
  ....
  template: `
    <pre [innerHtml]="circularObj | prettyjson:3"></pre>
  `
  })
  ...

A good set of styles to use is

   pre span {white-space: normal;}
   .string { color: green; }
   .number { color: darkorange; }
   .boolean { color: blue; }
   .null { color: magenta; }
   .key { color: red; }

If you wish to use the styles property of the parent component, please prefix each class selector with :host /deep/ e.g.

@Component({
 ....
 template: `
   <pre [innerHtml]="circularObj | prettyjson:3"></pre>
 `,
 styles: [`:host /deep/ .string {color:green} ...`]
 })
 ...

See output under component below.

Component

Creates a pre element into which the Pretty Json pipe'd object is dumped as HTML. Takes care of styling.

Takes an input [obj] that can be data bound to any object.

Make sure PrettyJsonModule is imported in your own module.

@Component({
  ....
  template: `
    <prettyjson [obj]="theForm.value"></prettyjson>
  `
  })
  export class MyComponent {
    ngOnInit() {
      this.theForm = this.formBuilder.group({
       ...

Thanks

This project is forked from matiboy/angular2-prettyjson.