This is tag / chips demo of how to use ng chips

import { Component, ViewEncapsulation, Input, OnInit } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
  encapsulation: ViewEncapsulation.Native
})
export class AppComponent {
  
  items: Array<any>;
  
  @Input() itemsCopy = 'How are you doing today';
  
  newArray: any;
  
  
  contructor() {
 
  }
  
  ngOnInit() {
    this.newArray = this.itemsCopy.split(/[ ,]+/);
    this.items = this.newArray;
    console.log('youre mom');
  }
  
  myFunction() {
    var re = /\s*;\s*/;
     this.newArray = this.itemsCopy.split(/[ ,]+/);
    this.items = this.newArray;
    console.log('your dad');
  }
  
  keyUpFunction(event) {
    if(event.keyCode == 13) {
      this.newArray = this.itemsCopy.split(/[ ,]+/);
      this.items = this.newArray;
      console.log('christian matthew');
    }
  }
  
  keyDownFunction(event) { 
    if(event.keyCode == 9) {
      this.newArray = this.itemsCopy.split(/[ ,]+/);
      this.items = this.newArray;
      console.log('paul matthew');
    }
  }
  
}

import { NgModule } from '@angular/core';
import { BrowserModule }  from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';

import { TagInputModule } from 'ngx-chips';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations'; // this is needed!

import { AppComponent } from './app.component';
import { TestComponent } from './test.component';

let directives: any[] = [
    AppComponent,
    TestComponent
  ];

@NgModule({
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    TagInputModule
  ],
  declarations: directives,
  bootstrap: [ AppComponent ],
})
export class AppModule { }

<h1>NG Chips Prototype</h1>


<tag-input 
  [(ngModel)]='items'
  [editable]="true"
  theme='minimal'
  [hideForm]="true"
></tag-input>
<div>
>> {{ items | json }}
</div>

<div>
  
  <div>
    {{ itemsCopy }} <<
  </div>
  <input (keyup)="keyUpFunction($event)" (keydown)="keyDownFunction($event)" [(ngModel)]="itemsCopy">
</div>

<button (click)="myFunction()">Click Here</button>

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';

platformBrowserDynamic().bootstrapModule(AppModule);

/* Master Styles */
h1 {
  color: #369;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 250%;
}
h2, h3 {
  color: #444;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: lighter;
}
body {
  margin: 2em;
}
body, input[text], button {
  color: #888;
  font-family: Cambria, Georgia;
}
a {
  cursor: pointer;
  cursor: hand;
}
button {
  font-family: Arial;
  background-color: #eee;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  cursor: hand;
}
button:hover {
  background-color: #cfd8dc;
}
button:disabled {
  background-color: #eee;
  color: #aaa;
  cursor: auto;
}

/* Navigation link styles */
nav a {
  padding: 5px 10px;
  text-decoration: none;
  margin-right: 10px;
  margin-top: 10px;
  display: inline-block;
  background-color: #eee;
  border-radius: 4px;
}
nav a:visited, a:link {
  color: #607D8B;
}
nav a:hover {
  color: #039be5;
  background-color: #CFD8DC;
}
nav a.active {
  color: #039be5;
}

/* items class */
.items {
  margin: 0 0 2em 0;
  list-style-type: none;
  padding: 0;
  width: 24em;
}
.items li {
  cursor: pointer;
  position: relative;
  left: 0;
  background-color: #EEE;
  margin: .5em;
  padding: .3em 0;
  height: 1.6em;
  border-radius: 4px;
}
.items li:hover {
  color: #607D8B;
  background-color: #DDD;
  left: .1em;
}
.items li.selected {
  background-color: #CFD8DC;
  color: white;
}
.items li.selected:hover {
  background-color: #BBD8DC;
}
.items .text {
  position: relative;
  top: -3px;
}
.items .badge {
  display: inline-block;
  font-size: small;
  color: white;
  padding: 0.8em 0.7em 0 0.7em;
  background-color: #607D8B;
  line-height: 1em;
  position: relative;
  left: -1px;
  top: -4px;
  height: 1.8em;
  margin-right: .8em;
  border-radius: 4px 0 0 4px;
}
/* everywhere else */
* {
  font-family: Arial, Helvetica, sans-serif;
}

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Passing information from parent to child</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <style>
      .to-top {margin-top: 9px; display: block;}
    </style>
    <link rel="stylesheet" href="styles.css">
    <link rel="stylesheet" href="demo.css">

    <!-- Polyfills -->
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>

    <script src="https://unpkg.com/zone.js@0.8.4?main=browser"></script>
    <script src="https://unpkg.com/systemjs@0.19.39/dist/system.src.js"></script>

    <script src="systemjs.config.js"></script>
    <script>
      System.import('main.js').catch(function(err){ console.error(err); });
    </script>
  </head>

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

</html>

/**
 * WEB ANGULAR VERSION
 * (based on systemjs.config.js in angular.io)
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
  System.config({
    // DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
    transpiler: 'ts',
    typescriptOptions: {
      // Copy of compiler options in standard tsconfig.json
      "target": "es5",
      "module": "commonjs",
      "moduleResolution": "node",
      "sourceMap": true,
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "lib": ["es2015", "dom"],
      "noImplicitAny": true,
      "suppressImplicitAnyIndexErrors": true
    },
    meta: {
      'typescript': {
        "exports": "ts"
      }
    },
    paths: {
      // paths serve as alias
      'npm:': 'https://unpkg.com/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      'app': 'app',

      // angular bundles
      '@angular/animations': 'npm:@angular/animations/bundles/animations.umd.js',
      '@angular/animations/browser': 'npm:@angular/animations/bundles/animations-browser.umd.js',
      '@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/animations': 'npm:@angular/platform-browser/bundles/platform-browser-animations.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/router/upgrade': 'npm:@angular/router/bundles/router-upgrade.umd.js',
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
      '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',
      '@angular/upgrade/static': 'npm:@angular/upgrade/bundles/upgrade-static.umd.js',
      'ngx-chips': 'npm:ngx-chips@1.4.7',
      'ng2-material-dropdown': 'npm:ng2-material-dropdown',

      // other libraries
      'rxjs':                      'npm:rxjs@5.4.0',
      'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js',
      'ts':                        'npm:plugin-typescript@5.2.7/lib/plugin.js',
      'typescript':                'npm:typescript@2.3.4/lib/typescript.js',

    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.ts',
        defaultExtension: 'ts',
        meta: {
          './*.ts': {
            loader: 'systemjs-angular-loader.js'
          }
        }
      },
      rxjs: {
        defaultExtension: 'js'
      }
    }
  });

})(this);

var templateUrlRegex = /templateUrl\s*:(\s*['"`](.*?)['"`]\s*)/gm;
var stylesRegex = /styleUrls *:(\s*\[[^\]]*?\])/g;
var stringRegex = /(['`"])((?:[^\\]\\\1|.)*?)\1/g;

module.exports.translate = function(load){
  var url = document.createElement('a');
  url.href = load.address;

  var basePathParts = url.pathname.split('/');

  basePathParts.pop();
  var basePath = basePathParts.join('/');

  var baseHref = document.createElement('a');
  baseHref.href = this.baseURL;
  baseHref = baseHref.pathname;

  basePath = basePath.replace(baseHref, '');

  load.source = load.source
    .replace(templateUrlRegex, function(match, quote, url){
      let resolvedUrl = url;

      if (url.startsWith('.')) {
        resolvedUrl = basePath + url.substr(1);
      }

      return 'templateUrl: "' + resolvedUrl + '"';
    })
    .replace(stylesRegex, function(match, relativeUrls) {
      var urls = [];

      while ((match = stringRegex.exec(relativeUrls)) !== null) {
        if (match[2].startsWith('.')) {
          urls.push('"' + basePath + match[2].substr(1) + '"');
        } else {
          urls.push('"' + match[2] + '"');
        }
      }

      return "styleUrls: [" + urls.join(', ') + "]";
    });

  return load;
};

import { Component } from '@angular/core';

@Component({
  selector: 'my-test',
  templateUrl: './test.component.html',
  styles: [`
      .div-box-child {
        background-color: lightgreen;
        width: 400px;
        margin-bottom: 20px;
      }
      
      .div-font-child {
        color: blue;
        text-shadow: 2px 2px 3px rgba(220, 220, 220, 0.5);
        padding: 15px;
      }
      .div-box {
  background-color: yellow;
  width: 400px;
  margin-bottom: 20px;
}

.div-font {
  color: red;
  text-shadow: 2px 2px 3px rgba(220, 220, 220, 0.5);
  padding: 15px;
}
  `]
})
export class TestComponent { }

<div class="div-box div-font">B.) Box of Child TestComponent</div>
<div class="div-box-child div-font-child">C.) Box of Child TestComponent Styled via Test Template CSS</div>

.div-box {
  background-color: lightblue;
  width: 400px;
  margin-bottom: 20px;
}

.div-font {
  color: red;
  text-shadow: 2px 2px 3px rgba(220, 220, 220, 0.5);
  padding: 15px;
}