UI-Router ng1-to-ng2

Hybrid Angular 1/Angular 2 UI-Router apps

This module provides ngUpgrade integration with UI-Router, enabling routing to both Angular 1 and Angular 1 Components (and/or templates).

Your app will be hosted on Angular 1 while you incrementally upgrade it to Angular 2. With ui-router-ng1-to-ng2, you can use either an Angular 1 or Angular 2 component as a view in your state definitions.

import { Ng2AboutComponentClass } from "./about.ng2.component";

/// ...

$stateProvider.state({
  name: 'home', 
  url: '/home',
  component: 'ng1HomeComponent' // ng1 component or directive name
})

.state({
  name: 'about', 
  url: '/about',
  component: Ng2AboutComponentClass // ng2 component class reference
});

.state({
  name: 'other',
  url: '/other',
  template: '<h1>Other</h1>', // ng1 template/controller
  controller: function($scope) { /* do stuff */ }
})

When routing to an ng2 component, that ng2 component uses the standard ng2 directives (ui-view and uiSref) from ui-router-ng2.

See the hybrid sample app for a full example.

Getting started

Add @angular, ui-router-ng2, and ui-router-ng1-to-ng2 to your package.json in addition to the existing angular-ui-router.

dependencies: {
  ...
  "@angular/common": "~2.0.1",
  "@angular/compiler": "~2.0.1",
  "@angular/core": "~2.0.1",
  "@angular/platform-browser": "~2.0.1",
  "@angular/platform-browser-dynamic": "~2.0.1",
  "@angular/upgrade": "~2.0.1",
   ...
  "angular-ui-router": "^1.0.0-beta.3",
  "ui-router-ng2": "^1.0.0-beta.3",
  "ui-router-ng1-to-ng2": "^1.0.12",
}

Bootstrapping a hybrid app

Switch your app from bootstrapping using ng-app to using the ngUpgrade manual bootstrap

// Add 'ui.router.upgrade' to your ng1 app module's depedencies
let ng1module = angular.module("myApp", [uiRouter, 'ui.router.upgrade']);

// Create an Angular 2 root NgModule
@NgModule({
  // import the Ng1ToNg2Module
  imports: [ BrowserModule, Ng1ToNg2Module ]
}) class SampleAppModule {}

// Create an upgrade adapter instance
import {UpgradeAdapter} from '@angular/upgrade';
let upgradeAdapter = new UpgradeAdapter(SampleAppModule);

// Supply ui-router-ng1-to-ng2 with the upgrade adapter
import {uiRouterNgUpgrade} from "ui-router-ng1-to-ng2";
uiRouterNgUpgrade.setUpgradeAdapter(upgradeAdapter);

// Manually bootstrap the app with the Upgrade Adapter (instead of ng-app)
upgradeAdapter.bootstrap(document.body, ['myApp']);

Route to ng2 components

Register states using either Angular 1 or Angular 2 code. Use component: in your state declaration.

var leaf = { 
  name: 'foo.bar.leaf',
   url: '/leaf',
   component: MyNg2CommponentClass 
};
$stateProvider.state(leaf);

Create ng2 Feature Modules (optional)

@NgModule({
  imports: [
    UIRouterModule.forChild({
      states: [featureState1, featureState2]
    })
  ],
  declarations: [FeatureComponent1, FeatureComponent2]
})
export class MyFeatureModule {}

Add the feature module to the root NgModule imports

@NgModule({
  // import the Ng1ToNg2Module
  imports: [ BrowserModule, Ng1ToNg2Module, MyFeatureModule ]
}) class SampleAppModule {}

Note: You can also add states directly to the root NgModule using UIRouterModule.forChild

@NgModule({
  // import the Ng1ToNg2Module and create a UIRouter "child module"
  imports: [
    BrowserModule,
    Ng1ToNg2Module,
    UIRouterModule.forChild({ states: NG2_STATES })
  ],
  declarations: [NG2_COMPONENTS]
}) class SampleAppModule {}

Limitations:

We currently support creating a <ui-view> in an Angular 1 view, then routing to Angular 1 or Angular 2 components inside that angular 1 ui-view.

We do not (yet) support creating a nested ui-view in Angular 2, then routing to an angular 1 component. Once an Angular 2 component has been routed to, any <ui-view> inside the Angular 2 component can only be targeted by other Angular 2 components.

Because of this, apps should be migrated starting from leaf states/views and work up towards the root state/view.