angular2-prettyjson

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.
Breaking change in 3.0.0 The UMD bundle has moved to a "bundle" subdirectory. SymstemJS users should update their system.config. Should not affect AngularCLI and other webpack projects.

Install

npm install angular2-prettyjson

ES2015 / UMD

Two versions are available: ES2015 modules and UMD. If you are using a project based on the AngularCLI, everything should work from a simple npm install.
If you are using the Angular Quickstart template (or other SystemJS based compilation), please point to the bundle angular2-prettyjson.umd.min.js file e.g. systemjs.config.js:

map: {
  ...
  // other libraries
  'rxjs':                      'npm:rxjs',
  'angular2-prettyjson': 'npm:angular2-prettyjson'
},
packages: {
  ...,
  'angular2-prettyjson': {
    defaultExtension: 'js',
    main: './bundles/angular2-prettyjson.umd.min.js'
  }

Usage

Import PrettyJsonModule to have access to following component and pipes

import {PrettyJsonModule} from '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:

Overriding JsonPipe throughout the app

If you want the Safe Pipe to be used throughout the app:

import {PrettyJsonModule, SafeJsonPipe} from 'angular2-prettyjson';
import {JsonPipe} from '@angular/common';

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

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
```css

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.
```js
@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.

```js
import {PrettyJsonComponent} from 'angular2-prettyjson';

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

outputs