What is the Lazy-loading in Angular and Different between Old syntax and New Syntax of Lazy-loading with examples

Hey Guys,

In this blog we are going to learn about How we can use Lazy-loading in angular with examples. We are also going to learn the different syntax of lazy loading in angular.

Lazy loading is used to load the specified module once the routes match.
It will load the modules once use access that particular section or modules in our application.
Using lazy loading will improve the performance of our application and also decrease the load time of our application.
Using lazy-loading will help to reduce the bundle size of the application.

Lazy -loading Old syntax in angular 7 or lower version

{

path: "feature",

loadChildren:'./feature-module/feature-module.module#FeatureModuleModule'
},

Lazy -loading new syntax in angular 8+

{

path:'feature',

loadChildren:() => import('./feature-module/feature-module.module').then(m => m.FeatureModuleModule)

}

For example,

Let's say we create a module using the below command.

ng g module feature-module --routing=true

Once your module generates let's create some components inside feature-modules like feature1, feature2, and feature3.

After creating the above structure you're setup looks like below.

Now either you can create one new file like the app-module-routing.ts file OR you can use the app.module.ts file for setting up lazy loading functionality.

For example

feature-module-routing.module.ts

Output of the feature modules in browser:

If you guys have any query then you can drop a mail to us on this mail id:

techoswag@gmail.com

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