Dynamic Navbar

<!DOCTYPE html>
<html>
  <head>
    <script src="https://code.angularjs.org/tools/system.js"></script>
    <script src="https://code.angularjs.org/tools/typescript.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/reflect-metadata/0.1.3/Reflect.js"></script>
    <script src="https://cdn.rawgit.com/angular/zone.js/master/dist/zone.min.js"></script>
    <script src="config.js"></script>
    <script src="https://npmcdn.com/ionic-angular@2.0.0-beta.10/bundles/ionic.system.js"></script>
  
    <link href="https://npmcdn.com/ionic-angular@2.0.0-beta.10/bundles/ionic.css" rel="stylesheet">
    <link href="style.css" rel="stylesheet">
  </head>

  <body>
    <!-- this Ionic's root component and where the app will load -->
    <ion-app></ion-app>
    
    <script>
      System.import('app.ts')
    </script>
  </body>

</html>

import { NavController, NavParams } from 'ionic-angular/index';
import { Page1 } from 'page1.ts'
import { Component } from "@angular/core";


@Component({
  templateUrl:"home.html"
})
export class HomePage {
  
  blue: any;
	green: any;
	red: any;
	theme: any;
  
  constructor(private nav: NavController, public params: NavParams) {
		this.theme = params.data.color;
  	this.blue = false;
  	this.green = false;
  	this.red = false;
  	
  	switch (this.theme) {
  			case "danger":
  				this.red = true;
  				break;
  			case "secondary":
  				this.green = true;
  			default:
  				this.blue = true
  				break;
  		}
	}
}

SCROLL-CONTENT {
	overflow-y: auto !important;
}

CODE {
  background: #EFEFEF;
}

/**
 * PLUNKER VERSION (based on systemjs.config.js in angular.io)
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 * Override at the last minute with global.filterSystemConfig (as plunkers do)
 */
(function(global) {

  var ngVer = '@2.0.0-rc.1'; // lock in the angular package version; do not let it float to current!

  //map tells the System loader where to look for things
  var  map = {
    'app':                        'src', // 'dist',
    'rxjs':                       'https://npmcdn.com/rxjs@5.0.0-beta.6',
    'angular2-in-memory-web-api': 'https://npmcdn.com/angular2-in-memory-web-api' // get latest
  };

  //packages tells the System loader how to load when no filename and/or no extension
  var packages = {
    'app':                        { main: 'app.ts',  defaultExtension: 'ts' },
    'rxjs':                       { defaultExtension: 'js' },
    'angular2-in-memory-web-api': { defaultExtension: 'js' },
  };

  var packageNames = [
      '@angular/common',
      '@angular/compiler',
      '@angular/core',
      '@angular/http',
      '@angular/router',
      '@angular/platform-browser',
      '@angular/platform-browser-dynamic',
      '@angular/router-deprecated',
      '@angular/testing',
      '@angular/upgrade',
  ];

  // add map entries for angular packages in the form '@angular/common': 'https://npmcdn.com/@angular/common@0.0.0-3'
  packageNames.forEach(function(pkgName) {
    map[pkgName] = 'https://npmcdn.com/' + pkgName + ngVer;
  });

  // add package entries for angular packages in the form '@angular/common': { main: 'index.js', defaultExtension: 'js' }
  packageNames.forEach(function(pkgName) {
    packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
  });

  var config = {
    transpiler: 'typescript',
    typescriptOptions: {
      emitDecoratorMetadata: true
    },
    map: map,
    packages: packages
  }

  // filterSystemConfig - index.html's chance to modify config before we register it.
  if (global.filterSystemConfig) { global.filterSystemConfig(config); }

  System.config(config);

})(this);


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component } from "@angular/core";
import { ionicBootstrap, Platform } from 'ionic-angular/index';
import { HomePage } from './home.ts';
import { TabsPage } from './tabs.ts';


@Component({
  template: '<ion-nav [root]="rootPage"></ion-nav>'
})
export class MyApp {
  constructor(private platform: Platform) {
    this.rootPage = TabsPage;
  }
}

ionicBootstrap(MyApp, [], {
  tabbarPlacement: "bottom"
});

<ion-header>
  <ion-navbar [attr.primary]="blue ? '' : null" [attr.secondary]="green ? '' : null" [attr.danger]="red ? '' : null">
    <ion-title>
      Dynamic Navbar
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content class="has-header">
  <div padding style="text-align: center;">
    <h1> Dynamically Change Navbar Color by Tabs</h1>
    <button [color]="theme">I change too!</button>
  </div>
</ion-content>

You can use this template to show examples of your Ionic 2 issue.

import { Component } from "@angular/core";
import {HomePage} from './home.ts';


@Component({
  templateUrl: 'tabs.html'
})
export class TabsPage {
  
  redParams = {
    color: "danger"
  };

  greenParams = {
    color: "secondary"
  };

  blueParams = {
    color: "primary"
  };
  
  // this tells the tabs component which Pages
  // should be each tab's root Page
  tab1Root: any = HomePage;
  tab2Root: any = HomePage;
  tab3Root: any = HomePage;

}

<ion-tabs>
  <ion-tab [root]="tab1Root" [rootParams]="redParams" tabTitle="Red"></ion-tab>
  <ion-tab [root]="tab2Root" [rootParams]="blueParams" tabTitle="Blue"></ion-tab>
  <ion-tab [root]="tab3Root" [rootParams]="greenParams" tabTitle="Green" ></ion-tab>
</ion-tabs>