What are the best practices for lazy loading in Angular CLI?

What are the best practices for lazy loading in Angular CLI?

Lazy loading in Angular CLI helps improve application performance by loading modules only when needed. Best practices include organizing your routes effectively, using the loadChildren syntax, and ensuring that shared modules are properly managed.

Can you explain how to implement lazy loading in my Angular app?

To implement lazy loading, you can create feature modules and configure your routes using the loadChildren property. For example:

const routes: Routes = [
  { path: 'feature', loadChildren: () => import('./feature/feature.module').then(m => m.FeatureModule) }
];

This way, the FeatureModule will only be loaded when the user navigates to the 'feature' route.

What are some common mistakes to avoid when using lazy loading?

Common mistakes include not properly managing shared modules, overusing lazy loading for small modules, and failing to pre-load critical modules that are essential for the initial user experience.

How can I test lazy loaded modules?

You can test lazy loaded modules by using Angular's testing utilities. Ensure that you import the lazy loaded module in your test bed and use the RouterTestingModule to simulate routing.