Angular2 FontAwesome Checkbox. Source: https://github.com/Sn3b/ng2-font-awesome-checkbox

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
    <script src="config.js"></script>
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <my-app>
    loading...
  </my-app>
  </body>

</html>

/* Styles go here */

# ng2-font-awesome-checkbox
A simple checkbox that uses a css "hack" to display text content (to use a FontAwesome icon) instead of the conventional checkbox, to be used in Angular2 projects.

### Usage:
#### Model-driven form:

```html
<form [formGroup]="myForm">
  <ng2-font-awesome-checkbox formControlName="doctor" [content]="'&#xf0f0;'"></ng2-font-awesome-checkbox>
</form>
```

```typescript
this.myForm = new FormGroup({
  user: new FormControl(true)
});
```

#### Template-driven form:

```html
<form #myForm="ngForm">
  <ng2-font-awesome-checkbox [(ngModel)]="myModel" [content]="'&#xf007;'" name="myControl" #myControl="ngModel"></ng2-font-awesome-checkbox>
</form>
```

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  map: {
    
    'app': './src',
    
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';

platformBrowserDynamic().bootstrapModule(AppModule)

//our root app component
import {Component, NgModule, OnInit} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {FormsModule, ReactiveFormsModule, FormGroup, FormControl} from '@angular/forms';

import {Ng2FontAwesomeCheckboxComponent} from './ng2-font-awesome-checkbox.component'

@Component({
  selector: 'my-app',
  template: `
    <form [formGroup]="myModelDrivenForm">
      <ng2-font-awesome-checkbox formControlName="myModelDrivenControl"
                                 [icon]="'fa-user'"
                                 [color]="'blue'"
                                 [size]="'25px'">
      </ng2-font-awesome-checkbox>
    </form>
    <pre>{{myModelDrivenForm.value | json}}</pre>
    <form #myTemplateDrivenForm="ngForm">
      <ng2-font-awesome-checkbox [(ngModel)]="isTemplateDrivenControlChecked"
                                 name="myTemplateDrivenControl"
                                 #myTemplateDrivenControl="ngModel">
      </ng2-font-awesome-checkbox>
    </form>
    <pre>{{myTemplateDrivenForm.value | json}}</pre>`,
})
export class App implements OnInit {
  public myModelDrivenForm: FormGroup;
  public isTemplateDrivenControlChecked: boolean = false;
  
  constructor() { }

  public ngOnInit(): void {
    this.myModelDrivenForm = new FormGroup({
      myModelDrivenControl: new FormControl(true)
    });
 }
}

@NgModule({
  imports: [ BrowserModule, FormsModule, ReactiveFormsModule ],
  declarations: [ App, Ng2FontAwesomeCheckboxComponent ],
  bootstrap: [ App ]
})
export class AppModule {}

// angular
import {
  Component,
  ElementRef,
  ViewChild,
  Input,
  forwardRef
} from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';

let fontAwesomeCheckboxComponentNextId = 0;

@Component({
  selector: 'ng2-font-awesome-checkbox',
  template: `<input #checkbox
                    [attr.id]="id"
                    type="checkbox"
                    (change)="onChange()" />
             <label [attr.for]="id">
               <i class="fa {{ icon }}"
                  [style.color]="color"
                  [style.font-size]="size"
                  aria-hidden="true"> 
               </i>
             </label>`,
  styleUrls: ['./src/ng2-font-awesome-checkbox.component.css'],
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => Ng2FontAwesomeCheckboxComponent),
      multi: true
    }
  ]
})
export class Ng2FontAwesomeCheckboxComponent implements ControlValueAccessor {

  get checked() {
    return this._checked;
  }
  
  set checked(checked: boolean) {
    this._checked = this._checkbox.nativeElement.checked = checked;

    if (!this._isValueSetFromWriteValue)
      this.onChangeCallback(this._checked);

    this._isValueSetFromWriteValue = false;
  }
    
  get color(): string {
    if(this._checked) {
      return this._color;
    } else {
      return 'lightgrey';
    }
  }
  
  @Input() set color(value) {
    this._color = value;
  }

  @Input() public icon: string = 'fa-font-awesome';
  @Input() public size: string = '1.33333333em';

  @ViewChild('checkbox') private _checkbox: ElementRef;
  private _checked: boolean                  = null;
  private _color: string                     = '#000';
  private _isValueSetFromWriteValue: boolean = false;

  private id = `ng2_font_awesome_checkbox_${fontAwesomeCheckboxComponentNextId++}`;

  public writeValue(value: any): void {
    if (value !== undefined) {
      this._isValueSetFromWriteValue = true;
      this.checked = value;
    }
  }

  public registerOnChange(fn: (_: any) => void): void {
    this.onChangeCallback = fn;
  }

  public registerOnTouched(fn: () => void): void {
    this.onTouchedCallback = fn;
  }

  public setDisabledState(isDisabled: boolean): void {
    this._checkbox.nativeElement.disabled = isDisabled;
  }

  public onChange(): void {
    this.checked = this._checkbox.nativeElement.checked;
    this.onTouchedCallback();
  }

  private onChangeCallback = (_: any) => { }
  private onTouchedCallback = () => { }
}

input[type=checkbox] {
  display: none;
}

label i {
  cursor: pointer;
}