I recently discovered a new feature in Angular 17 that allows for easier lazy loading using the @defer directive. I'm interested in learning how to implement it to streamline my existing code base. Currently, I am relying on the router for lazy loading, but it seems like I may not need it anymore. Can @defer help with that?
Imagine I have an Angular application with a secondary router-outlet within a component that dynamically displays content based on a left menu selection. The content is sourced from separate standalone components. Here's what my Angular 16 code looks like:
top.component.html
<div id="leftMenu">
<div (click)="loadContent('sub-a')">Button1</div>
<div (click)="loadContent('sub-b')">Button2</div>
</div>
<router-outlet></router-outlet>
top.component.ts
import { Component } from '@angular/core';
import { Router, RouterOutlet } from '@angular/router';
@Component({
selector: 'app-top',
templateUrl: './top.component.html',
styleUrls: ['./top.component.scss'],
standalone: true,
imports: [RouterOutlet]
})
export class TopComponent {
constructor(private router: Router) {}
loadContent(destination:string){
this.Router.navigate(['top', destination]);
}
}
top.routes.ts
import { Routes } from "@angular/router";
export default [{
path: '',
loadComponent: () => import('./top.component').then(m=>m.TopComponent),
children:[
{
path: 'sub-a',
loadComponent: () => import('./subA/sub-a.component').then(m=>m.SubComponentA)
},
{
path: 'sub-b',
loadComponent: () => import('./subB/sub-b.component').then(m=>m.SubComponentB)
}
]
}] as Routes;
How can I leverage @defer to simplify this process?