DEV Community

Manually Lazy load Components in Angular 8

Mayank Dubey on October 15, 2019

Angular is amazing! It is fast and smooth once loaded in the browser, but most often the start-up time suffers. Improving the start-up time for Ang...

Read full post

Benjamin Freitag • Feb 11 '20 • Edited

Do you know how to get it to work with a Material Dialog instead of a viewcontainer, like this?

this.lazyLoader.load("lazy").then(res => {
      this.dialog.open(res.componentType)
    })

I extended your sample at stackblitz.com/edit/lazy-angular-d... but also recieve Error: No component factory found for LazyComponent. Did you add it to @NgModule.entryComponents?

Mayank Dubey • Feb 12 '20

Hi,

Have you tried providing alternate componentFactoryResolver in material dialog config?

Benjamin Freitag • Feb 25 '20 • Edited

Thanks. Yes, I tried this but it still causes the same error in Angular 8. I updated the Stackblitz.

In Angular 9 this is fixed and there's no need to pass componentFactoryResolver 👏

Mayank Dubey • Feb 25 '20

I think it's related to this issue github.com/angular/angular/issues/...

Dileep3605 • Feb 7 '20

am trying your solution everything was running but it's throwing error on this state

const compFactory = moduleRef.componentFactoryResolver.resolveComponentFactory(entryComponent);

Error: No component factory found for SiteedittoolModule. Did you add it to @NgModule.entryComponents?

if can anyone help me that will be great

Mayank Dubey • Feb 8 '20

Hi,

Can you share more code?

fuhrermani • Dec 26 '19

how to pass inputs and catch outputs from this component.

Mayank Dubey • Dec 29 '19 • Edited

The createComponent() method returns a reference to the loaded component. Use that reference to interact with the component by assigning to its properties or calling its methods.

Add input and output in component:-

@Input()
data: string;

@Output()
event = new EventEmitter();

In the service just add:-

const compRef = container.createComponent(compFactory);

(compRef.instance as LazyComponent).data = 'this is data';
(compRef.instance as LazyComponent).event.subscribe(v => ... );