Angular Best Practices: Make Your Angular App Performance

With a dire need to cut-down time to market we are bringing top Angular best practices which will also make your app performant. These best practices are the most efficient approach to develop a large-scale Angular app.

Following are our specially compiled Angular best practices:

Use Angular CLI

Angular CLI is a great tool for front-end developers, and it will help you develop and maintain your Angular applications. It provides a small set of CLI commands that can be used to automate common tasks in an Angular application. Developers can use CLI to run various commands to write, test, and maintain Angular applications.

The CLI has different options to configure its behavior and uses the environment variable to manage its settings. You can use these variables to set different aspects of the CLI, such as logging and cache, to increase your Angular 'applications' performance.

Let's see how to get started with Angular CLI:

• Install CLI with NPM packages, the command to do so: install -g @angular/cli
• Command to create a new application is ng new

• Develop pipes, components, routes, services with a command ng create
• Command to test an app that is still in the development phase is ng serve
• For conducting end-to-end testing, the command is ng test
• Use command ng lint to create a code shine
• In order to set up an Angular service worker, type ng add @angular/PWA.

Breakdown of the large components:

We can break our Angular component into smaller reusable parts. This will help us to write smaller code and maintainability. We can reuse components in different projects, for example, different Angular applications or even different Angular templates.

Maintain A Proper Folder Structure

The folder structure is crucial for any web/app development project. It is the first thing you should set up in your development environment. A proper folder structure makes it easier to organize your code, and it also helps you find files quickly when they are needed.

It is important to create a folder structure that reflects the content of your project so that others can have access to it, developers and designers as well. If you are using Angular, you must have created an "app" folder where all the files related to Angular will be placed. This will help you maintain a consistent code base across different projects.

Use Appropriate Angular Operators

An Angular developer should use Angular Operators relevant to the situation, particularly when flattening operators with observables. Use the switch map when you want to ignore all the emissions due to updated emissions.

A developer can also use mergeMap to handle emissions individually for concatMap.

Build & Use Reusable Components

Reusable components are a great way of building reusable, scalable, and maintainable Angular apps. They provide an easy way to add business logic to your app without having to worry about the details of how it works. These components can be reused in other projects or even in the same project. We can use angular components as reusable building blocks to create a custom UI. This makes it easier to create complex and new UI elements in a short period.

With reusable components, the application is developed in only one codebase instead of multiple ones. This makes it simple to develop and test our application locally before deploying it to servers.

Cache API Calling In The Application

API calls are one of the top Angular best practices. It saves your time and reduces the load on the server by restricting server requests and retrieving additional data from caching API calls. This particular Angular best practice works the best with eCommerce websites. Because the better page speed, the higher will be the Core Web Vitals which further helps in SEO

Following Angular Code Styles best practices

In an observation, our senior Angular developer found that there are some code style best practices that makes the code cleaner, highly readable, understandable, and simpler. Let'sLet's have a look at what exactly these code style best practices are:

• Per file code should not be more than 400 lines
• Per function code should not exceed 75 lines
• Declare ''cont'' when the value of a variable does not vary
• In order to share feature area for all slider components, use a custom prefix
• Leave a line between modules and imports

Stay Away From ''Any'' Type

Not using ''any'' type can save you from a lot of unexpected issues. Besides, not using ''any'' type in your application makes refactoring simple. Just typing the specific variables (excluding others) will restrict the problems.

Lazy Loading

The strength of Angular is its ability to load large amounts of data quickly. But this comes at the cost of memory and CPU usage. The solution to this problem is lazy loading, which loads only the data needed in the application at the moment.

It solves this problem by caching the data and reusing it when needed. Angular has a feature to enable lazy loading called the "data-only" directive, which will cache all required data in order to make your application more performant.

The Angular router will automatically handle the loading of required data for you since it knows how to do dependency injection, making your application more performant.

Properly Lint The Angular Code

Linting is the process of checking and fixing potential errors in a program. It can be used to ensure that the code is correct or that it doesn't contain any errors. Fortunately, it's completely system-agnostic and doesn't require any special programming languages, frameworks, or environments to implement.

By capturing all of the compiler warnings in one place, we make it very easy to fix these issues as they arise. This means that our software will be both more robust and easier to maintain in the future. This feature is supported in almost all the code editors and also has the option to customize its own linting rules and configuration.

Document Your Angular App Code

It is a part of the duty of Angular developers to document the code while or after application development. The documentation will help other developers (either involved or not involved0 to understand the purpose, logic, and intent.

It is preferable to document each variable and method to make it easy for other developers to introduce changes or maintain the app.

Talking about methods, Angular development should define in comments what tasks the methods perform and all the parameters attached to them.

Commenting enhances the readability of the code, which makes code maintenance easy.

Over To You

So this was all about the top Angular best practices. We highly recommend you implement these practices and experience the change in your codebase, application performance, and efforts required in application maintenance. You will see dramatic enhancement in all the aspects; we can bet on it.

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