how to lazy load a component in angular

Angular is a popular JavaScript framework for building web applications. One of the challenges that developers face when building large applications is the load time of the application. The more components a web application has, the longer it takes to load the page. This is where lazy loading comes in handy. In this article, we will discuss “how to lazy load a component in Angular.”

What is Lazy Loading?

Lazy loading is a technique where you only load the components that are needed when they are required. This technique is particularly useful for large applications, as it helps to reduce the initial load time. Lazy loading is one of the main features of Angular, and it allows you to load components on-demand.

How to Lazy Load a Component in Angular

To lazy load a component in Angular, you need to follow the below steps:

Step 1: Create a new module

Firstly, you need to create a new module for the component that you want to lazy load. To create a new module, use the following CLI command:```ng g m lazy-loaded-module```This command will generate a new module in the app folder of your Angular project.

Step 2: Create a new component

Next, create a new component in the module you created in step 1. To create a new component, use the following CLI command:```ng g c lazy-loaded-component```This command will generate a new component in the module you created in the previous step.

Step 3: Add routes

After creating the module and component, you need to add routes to the lazy-loaded module. To add routes, open the module file and import the RouterModule and Routes. Then define the routes:```import { RouterModule, Routes } from “@angular/router”;import { NgModule } from “@angular/core”;import { CommonModule } from “@angular/common”;import { LazyLoadedComponent } from “./lazy-loaded-component/lazy-loaded-component.component”;const routes: Routes = [{path: “”,component: LazyLoadedComponent}];@NgModule({declarations: [LazyLoadedComponent],imports: [CommonModule,RouterModule.forChild(routes)]})export class LazyLoadedModule { }```

Step 4: Load the module

Finally, you need to load the module in your main routing file. To do this, add the following code to the main routing file:```const routes: Routes = [{path: “”,redirectTo: “home”,pathMatch: “full”{path: “home”,component: HomeComponent{path: “lazy”,loadChildren: () => import(“./lazy-loaded-module/lazy-loaded-module.module”).then(m => m.LazyLoadedModule)}];```

Conclusion

In conclusion, lazy loading is an essential technique for developers who are working on large-scale Angular applications. It helps to reduce the load time of the application and ensures that only the necessary components are loaded. By following the above steps, you can easily implement lazy loading in your Angular application.