javascriptangularangularjstypescriptroutes

Angular JS to Angular 18 migration

I'm trying to create a hybrid Angular JS Angular 18 application, and at first the application was running fine with this setup:

upgrade-module.ts

import { DoBootstrap, NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UpgradeModule } from '@angular/upgrade/static';

@NgModule({
  imports: [
    BrowserModule,
    UpgradeModule
  ]
})
export class AppModule implements DoBootstrap {
  constructor(private upgrade: UpgradeModule) { }
  ngDoBootstrap() {
    this.upgrade.bootstrap(document.body, ['myapp'], { strictDi: false });
  }
}

main.ts file:

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/upgrade-module';

platformBrowserDynamic().bootstrapModule(AppModule)
  .catch((err) => console.error(err));

and this in my index.html:

<body>
  <div ui-view></div>
</body>

However, I tried added angular 18 components to test if they could also work in the hybrid application like this:

import { DoBootstrap, NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UpgradeModule } from '@angular/upgrade/static';
import { routes } from './app.routes'; // Ensure the correct path to your routes
import { RouterModule } from '@angular/router';
import { LocationUpgradeModule } from '@angular/common/upgrade';
// import { AppComponent } from './app.component';

@NgModule({
  imports: [
    BrowserModule,
    UpgradeModule,
    RouterModule.forRoot(routes),
    LocationUpgradeModule.config({
      useHash: true,
      hashPrefix: '!'
    })
  ]
})
export class AppModule implements DoBootstrap {
  constructor(private upgrade: UpgradeModule) { }
  ngDoBootstrap() {
    this.upgrade.bootstrap(document.body, ['myapp'], { strictDi: false });
  }
}

routes:

import { Routes } from '@angular/router';
import { AppComponent } from './app.component';
import { AngularJsComponentComponent } from './angular-js-component/angular-js-component.component';

export const routes: Routes = [
    { path: '', redirectTo: '/hello', pathMatch: 'full' },
    { path: 'hello', component: AppComponent },
    { path: '**', component: AngularJsComponentComponent }
];

index.html:

<body>
  <router-outlet></router-outlet>
</body>

the template of the angularjs component is:

<div ui-view></div>

but now nothing is being rendered

Solution

  • Shouldn't it be.

    <body>
  <app-root></app-root>
</body>

    This will render the angular components inside the body tag.

    Also we need to import the app.component inside the module and bootstrap it.

    import { DoBootstrap, NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UpgradeModule } from '@angular/upgrade/static';
import { routes } from './app.routes'; // Ensure the correct path to your routes
import { RouterModule } from '@angular/router';
import { LocationUpgradeModule } from '@angular/common/upgrade';
import { AppComponent } from './app.component';

@NgModule({
  imports: [
    BrowserModule,
    UpgradeModule,
    RouterModule.forRoot(routes),
    LocationUpgradeModule.config({
      useHash: true,
      hashPrefix: '!'
    })
  ],
  declarations: [AppComponent],
  bootstrap: [AppComponent],
})
export class AppModule implements DoBootstrap {
  constructor(private upgrade: UpgradeModule) { }
  ngDoBootstrap() {
    this.upgrade.bootstrap(document.body, ['myapp'], { strictDi: false });
  }
}

    Finally in the app.component.html it should contain the router-outlet.

    You have to create another component that will serve as a replacement for the component you defined on route hello.

    ...
export const routes: Routes = [
    { path: '', redirectTo: '/hello', pathMatch: 'full' },
    { path: 'hello', component: SomeComponent },
    { path: '**', component: AngularJsComponentComponent }
];