Overview
You may move between various views and components in your Angular application using the Angular routing system. It facilitates the creation of single-page applications (SPAs) by allowing you to dynamically alter the page’s content without having to refresh the whole thing. Angular routing manages navigation on the client side as opposed to conventional server-side routing, which manages page loading and navigation on the server.
What is Lazy Loading?
Using the method known as “lazy loading,” the browser loads just the modules or parts that are required for the given situation. Regardless of the active route, not all of the modules will load. For example, users will click the “Sign Up” button on Instagram to start a new account. In this case, we simply want the sign-up part to load. Similarly, the component for that connection will load when the connections page’s user interface appears. Angular’s strong Lazy Loading? -27100 feature allows you to postpone the loading of specific components of your application, such as modules and their related elements until they are needed. Think of it as a well-stocked pantry from which you pull out only the components required for the dish.Want to Upskill to get ahead in your career? Check out the AngularJS Online Course.
How Can We Achieve It?
You must design feature modules for your Angular application that include certain application components. You may designate which modules should be lazy-loaded depending on the routes, and these modules can be loaded individually.
Lazy loading is one approach that we frequently employ in both web and Angular app development, but there are other methods to accomplish it as well. Angular routing module? –720 may significantly enhance Angular apps’ speed and functionality.
Why Lazy Loading?
Everything you did, including setting up a content delivery network (CDN), enabling file compression, minifying static JS and CSS files, and configuring resource caching, is correct. You’ve taken care to uphold sound coding practices and encourage component reuse. You’re now keeping an eye on the functionality of your website and crossing your fingers. However, your page still loads too slowly even after all of this effort. A performance monitoring tool is used to measure loading times. It yields a low score, as you may have expected. The issue is that, since they are all in some manner essential components of your website, none of the materials on it can be deleted. This is where loading slowly is useful.Interested in learning more about MEAN Stack? check this out MEAN Stack Course in Pune.
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How to implement lazy loading in the Angular routing module?
Step 1: Create A Module and a Specific Routing File First.
This is necessary to manage the components of angular lazy loading in the modules of Angular 11. What’s the purpose of initially building a module anyway? Due to the impossibility of a single component’s sluggish loading. This is because of the way Angular is structured. An Angular module is a grouping of related components.
All of these dependencies are combined into a chunk in the application list, which is just transpiled JS code. The modules that need to be slowly loaded make up a different chunk, whereas the modules that are directly imported make up the main chunk.
Step 2: Build a Lazy Loading Angular Component
We will create an angular module for lazily loading components during this phase.
Step 3: Place the link in the header in step three.
Put a link to the path where lazy loading is to be used in the header.
Step 4: Use LoadChildren to Implement Lazy Loading
In this stage, we utilize loadChildren to create slow loading for the “/user-dashboard” route. There are two different ways to go about this:
Making Use of Promise and Async: To specify which routes need to be loaded slowly, promise code is utilized, which is a promise-based syntax. The loadChildren attribute is updated with the routes that will be loaded slowly. Promises are quite rudimentary, though, and a more sophisticated version, like Angular 11, should have a simpler coding style.
Step 5: Route Configuration
Finally, we use the code below in the user-dashboard-routing.module.ts file to configure the route.Enroll for MEAN Stack Online Training and get in-depth knowledge of MEAN Stack.
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Pros and Cons of Lazy Loading
Pros:
- Decreased bundle size: Particularly for customers on mobile networks, lazy loading makes your initial bundle size lower, resulting in quicker page loads and reduced data use. It is portable and features a little backpack.
- Enhanced performance: Your application will render more smoothly and operate with fewer resources to manage when there is less code loaded initially. Consider a race vehicle with a streamlined shape for maximum velocity.
- Enhanced modularity: A modular design, with your code separated into distinct, independent modules, is encouraged by Lazy Loading in Angular-5400. Long-term development and maintenance of your application are facilitated by this. To maintain organization and accessibility, picture it as having distinct drawers for each type of cooking utensil.
Cons:
- First of all, the code becomes quite complex due to the additional lines that must be added to the current ones to accomplish a slow load.
- Extra programming while using JavaScript
- The user’s experience might be impacted. For instance, if the page structure is not ideal, retracing might not be possible.
Types of Lazy Loading in Angular
Eager loading and lazy loading are the two main methods of loading in Angular.
Eager Loading
In Angular, eager loading is the default loading technique. Regardless of whether a module is needed right away or not, it is loaded when the program launches using this method. Larger initial bundle sizes may result from this, which might affect how quickly the program loads.
Lazy loading
Modules are loaded using the lazy loading mechanism as and when they are required. This can speed up the application’s loading time and drastically reduce the size of the first bundle, particularly for large apps. For big apps, using lazy loading is recommended as it lowers the initial load time and lets you divide the program into smaller, easier-to-manage chunks.
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Advanced Lazy Loading Strategies
Dynamic Lazy Loading with the Router
Dynamic lazy loading is one of Angular’s more sophisticated methods of lazy loading modules and components based on runtime conditions. If you have a feature-rich app and want to load specific features only in response to user input or other variables, this may be quite helpful.
So, how may dynamic lazy loading be implemented in Angular? Using custom route resolvers is one method for doing this. Before a route is active, data related to it can be resolved using a service called a route resolver. You may utilize the ability to customize when and how a route loads—as well as the ability to dynamically load modules and components as needed—by developing your custom route resolver.
Using the Angular CLI for Lazy Loading
Using the Angular CLI is one of the simplest methods to add lazy loading to your Angular application. In case you are unfamiliar, the Angular CLI is a command-line utility that facilitates the creation, construction, and upkeep of Angular applications. It’s a vital tool for every Angular developer and comes with several built-in performance-enhancing features, including support for lazy loading.
Code splitting
To further enhance efficiency, code splitting is an additional sophisticated approach that may be combined with lazy loading. It entails dividing your code into several bundles that may load concurrently or on demand.
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Lazy Loading with Angular Libraries
Angular is a TypeScript, HTML, and CSS application development platform. Software engineers want to provide generic solutions (for a certain domain) that may be reused by other apps because many applications need to handle similar challenges. One Angular framework that offers a full suite of UI elements appropriate for desktop, tablet, and mobile platforms is called Angular Material.
NgModules: What Are They?
NgModules are Angular libraries such as FormsModule, BrowserModule, and RouterModule. Another kind of NgModule is Angular Material, a third-party tool. NgModules are collections of code and files associated with a certain domain or sharing a common set of features. Pipes, services, directives, and components are all declared in a standard NgModule file. If other modules are required for the existing module, they can also be imported. The ability to be lazily loaded is one of NgModules’ key benefits.
The Loading of Angular Libraries
When the application launches by default, the Angular Libraries-2400 are eagerly loaded. This indicates that the main application bundle now contains all of the library’s code, increasing its size and perhaps impacting the initial loading time. Dynamically loading the library modules as needed is known as “lazy loading” Angular libraries. This streamlines the loading procedure and lowers the initial bundle size.
Building Lazy Libraries’ Feature Modules
For each library you wish to lazily load, create a feature module. Import and export the required pipework, directives, and components from the library within the feature module. This enables these components to be used by other modules when they are loaded.
Testing Angular Libraries’ Lazy Loading
Tools like the webpack Bundle Analyzer and the Network tab in Chrome DevTools may be used to verify whether the lazy loading of Angular libraries is working as intended.Check out Angular Classes in Pune. Enroll now!
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Best Practices for Implementing Lazy Loading in Angular
The best practices must be adhered to to maximize the benefits of lazy loading. The following are some Angular recommended practices for leveraging lazy loading:
- Module Structure
If you want to lazily load features, create separate modules for them. For example, in an e-commerce application, you may have a ProductsModule for product display and a CartModule for cart management.
- Route Setup
In the app-routing.module.ts file, define your routes. Use the load function to specify modules that are lazy-loaded.
- Common Modules
With shared modules in lazy-loaded modules, use caution. To reduce needless imports, if essential, establish common modules with specified features.
- loading again
Preloading may be used to load certain modules that are lazy-loaded in the background.
- Eliminate Lean Loading
Think about which modules require lazy loading. Lazy loading a SettingsModule, for example, is not essential if it is utilized on only a few pages.
- Testing
Using the Angular testing tools, create tests for components that are lazy-loaded.
- Observation and Evaluation of Performance
To evaluate the effects of lazy loading on loading times and to examine the performance of your application, utilize tools such as Lighthouse or Chrome DevTools.
- Collaboration and Documentation
Make sure everyone on your team is aware of the advantages of your lazy loading method by documenting it in a readme file or shareable document.
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Conclusion
A useful method for enhancing user experience and web application speed is lazy loading. Developers may drastically cut down on initial loading times and provide consumers with a smoother experience by loading just the components that are required at that precise moment. With Lazy Loading? -27100 Angular, the integrated routing module makes it simple to perform slow loading. Your development process may produce high-performing applications that captivate and please users by integrating lazy loading.visit 3RI Technologies.
