<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <script type="text/javascript" charset="utf-8">
      window.AngularVersionForThisPlunker = 'latest'
    </script>
    <title>angular playground</title>
    <link rel="stylesheet" href="style.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="https://use.fontawesome.com/fe178087c3.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 */

.cont{
  margin: -22px 0px 0px 253px;
}
### Angular Starter Plunker - Typescript
var angularVersion;
if(window.AngularVersionForThisPlunker === 'latest'){
  angularVersion = ''; //picks up latest
}
else {
  angularVersion = '@' + window.AngularVersionForThisPlunker;
}

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'+ angularVersion + '/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common' + angularVersion + '/bundles/common.umd.js',
    '@angular/common/http': 'npm:@angular/common' + angularVersion + '/bundles/common-http.umd.js',
    '@angular/compiler': 'npm:@angular/compiler' + angularVersion  + '/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser' + angularVersion + '/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic' + angularVersion + '/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http' + angularVersion + '/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router' + angularVersion +'/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms' + angularVersion + '/bundles/forms.umd.js',
    '@angular/animations': 'npm:@angular/animations' + angularVersion + '/bundles/animations.umd.js',
    '@angular/platform-browser/animations': 'npm:@angular/platform-browser' + angularVersion + '/bundles/platform-browser-animations.umd.js',
    '@angular/animations/browser': 'npm:@angular/animations' + angularVersion + '/bundles/animations-browser.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core' + angularVersion + '/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common' + angularVersion + '/bundles/common-testing.umd.js',
    '@angular/common/http/testing': 'npm:@angular/common' + angularVersion + '/bundles/common-http-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler' + angularVersion + '/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser' + angularVersion + '/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic' + angularVersion + '/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http' + angularVersion + '/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router' + angularVersion + '/bundles/router-testing.umd.js',
    'tslib': 'npm:tslib@1.6.1',
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.2.1/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, VERSION} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import { FormsModule } from '@angular/forms';
import {MultiSelectDropdown} from './multiselect';

@Component({
  selector: 'my-app',
  template: `
    <div>
      <multi-selector-dropdown [list]="list" (shareCheckedList)="shareCheckedList($event)" (shareIndividualCheckedList)="shareIndividualCheckedList($event)"></multi-selector-dropdown>
      <div class="cont"> {{checkedList | json}} <br><br>{{indi | json}}</div>
    </div>
  `,
})
export class App {
  
  list : any[];
  checkedList : any[];
  indi : {};
  constructor(){
    this.list = 
      [
        {name :'India',checked : false},
        {name :'US',checked : false},
        {name :'China',checked : false},
        {name :'France',checked : false}
      ]
  }

  shareCheckedList(item:any[]){
    console.log(item);
    this.checkedList = item;
  }
  shareIndividualCheckedList(item:{}){
    console.log(item);
    this.indi = item;
  }
}

@NgModule({
  imports: [ BrowserModule,FormsModule ],
  declarations: [ App,MultiSelectDropdown ],
  bootstrap: [ App ]
})
export class AppModule {}
import {Component,Input,Output,EventEmitter} from '@angular/core';

@Component({
    selector :'multi-selector-dropdown',
    templateUrl :'./src/dropdown.html',
    styleUrls : ['./src/app.css']
})

export class MultiSelectDropdown{
    @Input() list:any[]; 
    
    @Output() shareCheckedList = new EventEmitter();
    @Output() shareIndividualCheckedList = new EventEmitter();
    
    
    checkedList : any[];
    currentSelected : {};
    
    constructor(){
        this.checkedList = [];
    }
    getSelectedValue(status:Boolean,value:String){
        if(status){
          this.checkedList.push(value);  
        }else{
            var index = this.checkedList.indexOf(value);
            this.checkedList.splice(index,1);
        }
        
        this.currentSelected = {checked : status,name:value};

        //share checked list
        this.shareCheckedlist();
        
        //share individual selected item
        this.shareIndividualStatus();
    }
    shareCheckedlist(){
         this.shareCheckedList.emit(this.checkedList);
    }
    shareIndividualStatus(){
        this.shareIndividualCheckedList.emit(this.currentSelected);
    }
}
<div>
    <h3>Multi select dropdown</h3>
    <div (mouseleave)="showDropDown = false">
        <button class="drop-toggle btn flat" (click)="showDropDown=!showDropDown">
            <span *ngIf="checkedList.length<=0">Select</span>
            <span *ngIf="checkedList.length>0">{{checkedList.join(', ')}}</span>
            <i class="fa fa-angle-down"></i>
        </button>
        <div class="drop-show" *ngIf="showDropDown">
            <label *ngFor="let a of list">
                <input type="checkbox" [(ngModel)]="a.checked" 
                    (change)="getSelectedValue(a.checked,a.name)" />
                <span>{{a.name}}</span>
            </label>
        </div>
    </div>
</div>
/***
    css for multi select drop down
**/
.drop-toggle{
    background-color: #fff;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    cursor: hand;
    border: 1px solid #ccc;
    width: 233px;
    text-align: left;
}
.drop-toggle i{
    float:right;
}
.drop-show {
    padding: 4px;
    width: 222px;
    background-color: #FFF;
    border: 1px solid #BABABA;
    position: absolute;
    z-index: 100;
    -webkit-box-shadow: 0 6px 10px rgba(0,0,0,.15);
    -moz-box-shadow: 0 6px 10px rgba(0,0,0,.15);
    box-shadow: 0 6px 10px rgba(0,0,0,.15);
    margin-left: 1px;
}
.drop-show label{
    display:block;
    font-size:15px;
    cursor: pointer;
}
.drop-show label input{
    vertical-align: top;
}
.drop-show label span{
    display:inline-block;
}