๐๐ฎ๐๐ ๐๐ผ๐ฎ๐ฑ๐ถ๐ป๐ด ๐ก๐ด๐ฅ๐ ๐๐ณ๐ณ๐ฒ๐ฐ๐๐ ๐ถ๐ป ๐๐ป๐ด๐๐น๐ฎ๐ฟ ๐ญ๐ด: ๐ ๐ฃ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ ๐๐ผ๐ผ๐๐๐ถ๐ป๐ด ๐๐๐ถ๐ฑ๐ฒ
NgRx is a powerful state management library for Angular applications, but as your app scales, eagerly loaded effects can slow down performance. Lazy loading NgRx effects in Angular 18 helps optimize resource usage and improve app efficiency. In this guide, weโll walk through the steps to set up lazy-loaded effects in your Angular application.
๐ช๐ต๐ ๐๐ฎ๐๐ ๐๐ผ๐ฎ๐ฑ ๐๐ณ๐ณ๐ฒ๐ฐ๐๐?
By default, NgRx effects are eagerly loaded, meaning they are initialized when the application starts. However, not all parts of an application need to load immediately. Lazy loading effects ensures that specific effects only initialize when their corresponding feature modules or routes are loaded, leading to:
- โก Reduce initial load time โ Your app starts faster by skipping unnecessary effects.
- ๐ Optimize resource usage โ Effects wonโt take up memory until required.
- ๐ฅ Enhance user experience โ Users get a smoother, more responsive app.
๐ฆ๐ฒ๐๐๐ถ๐ป๐ด ๐จ๐ฝ ๐๐ฎ๐๐ ๐๐ผ๐ฎ๐ฑ๐ถ๐ป๐ด ๐ณ๐ผ๐ฟ ๐ก๐ด๐ฅ๐ ๐๐ณ๐ณ๐ฒ๐ฐ๐๐
๐ฆ๐๐ฒ๐ฝ ๐ญ: Install NgRx (If Not Installed)
If you havenโt already set up NgRx in your project, install the required dependencies:
๐ฃ๐ฅ๐ข ๐๐ฃ๐จ๐ฉ๐๐ก๐ก @๐ฃ๐๐ง๐ญ/๐จ๐ฉ๐ค๐ง๐ @๐ฃ๐๐ง๐ญ/๐๐๐๐๐๐ฉ๐จ๐ฆ๐๐ฒ๐ฝ ๐ฎ: Define a Feature State and Actions
Letโs assume we have a Products route that needs to be lazily loaded. First, define the actions for handling API requests.
๐ฆ๐๐ฒ๐ฝ ๐ฏ: Create the Feature Effects
Next, define the ProductsEffects class to handle API calls.
๐ฆ๐๐ฒ๐ฝ ๐ฐ: Import the store and app reducers into the Application config
๐ฆ๐๐ฒ๐ฝ ๐ฑ: Lazy Load the Effects in Routing
Assuming you have a Main component route setup that leads to your product routes, this is where we configure Lazy loading in the routing.
๐ฆ๐๐ฒ๐ฝ ๐ฒ: Verify Lazy Loading
To ensure that the NgRx effects are lazily loaded, open the Network tab in Chrome DevTools and navigate to the Products page. You should see a request to load the chunk dynamically only when it is needed.
Also from the Redux DevTools, the effects are provided at the point of routing, if it were not the API calls from the Network tab would not be initiated.
๐๐ผ๐ป๐ฐ๐น๐๐๐ถ๐ผ๐ป
Lazy-loading NgRx effects is a game-changer for Angular apps! It improves performance, reduces unnecessary processing, and ensures your app remains smooth and efficient.
