Using the different Angular tools and adhering to some of the Angular best practices will provide your website/web app the best chance to stand out among its competitors and offer the best user experience to your users. Here are some new Angular best practices that have been discovered by the experts over the development of multiple Angular apps, which aid in writing clean code, maintaining coding standards, and improving performance. If you have used Angular before, you would be aware of one of its most significant challenges: keeping up with its frequent upgrades and modifications.
As everyone is aware, Angular 12 was launched on May 12, 2021. To acquire the most recent information, we’ve integrated the newest Angular products into this best practices blog.
These features have made AngularJS one of the most widely used backend frameworks in 2023. Moreover, angular libraries are among the most reliable libraries for programmers.
To improve efficiency and security, this instructional blog focuses on the Angular best practices that guarantee optimal implementation using the Angular programming language.
Top 11 Angular Best Practices in 2023
1. Using angular coding styles for Angular Coding Best Practices
Below mentioned are some of the thumb rules for performing best in coding that in turn ensures the compliance of your Angular project with the pre-fixed Angular Style Guide –
- Ensure that there are not more than 400 lines in your code i.e., the optimum limit per file.
- Make sure that each function of the code possesses not more than 75 lines
- Declare ‘const.’ if there are constant values for variables
- Do use only the lower camel cases to name the properties and methods.
- Make it a point to leave an empty line between the imports and the modules.
- For the interfaces, do not name them beginning with uppercase I, like in the case of a few programming languages.
2. Principle of Single Responsibility
Making sure you only use one instance of the components, directives, or service inside of a single file is one of the most crucial in Angular development best practices. There should only be one specific function assigned to each file. By doing this, you can maintain the clean, manageable, legible, and maintainable nature of your Angular code.
3. Breaking the Large Components into Manageable Sizes
You should maintain the same level of clarity and cleanliness in your component files as you do in the code files. It can be challenging to test, debug, and maintain essential aspects. Increased efficiency in deconstructing larger and more important components into smaller and more manageable ones would have a big positive impact on your entire Angular app. Try to split your components down into smaller items such that each has just one atomic operation. This is one of the Angular recommended practices.
4. Making use of Angular CLI
Among the Angular best practices, one thing that you can’t avoid is correctly utilizing CLI. It is considered to be among the most potent tools for Angular app development. An initialization, development, scaffolding, maintenance, testing, and debugging tool for Angular apps is entitled Angular CLI. To create a foundational structure for your entire application, employ Angular CLI. The app flow and folder structure can be more easily understood by other developers by using Angular CLI, which reduces the amount of time needed for development.
A few handy commands that can be used along with Angular CLI are mentioned below
ng new – used for creating an app that can already function, creatively.
ng generate – one can generate components, routes, services & pipes with test shells.
ng serve – assists in testing your developing app, locally
ng test – employed for functioning number of Angular tests across the app.
ng lint – this is to help the Angular code to shine.
ng add @angular/PWA – this offers help in setting up the Angular service worker.
5. Properly utilizing the Lazy Loading
Overall productivity can be increased by using lazy load modules. A built-in feature of Angular called, Lazy Load aids developers in loading only the necessary components. For instance, when you make use of the feature, it gets you the components and other items you wanted and thus prevents the loading of additional and useless files. Its functionality looks like
Here, “LazyLoading” is not implemented, resulting in the creation of big, unnecessary, heavy applications.
When you utilize “LazyLoad,” it helps you shrink the size of the app by forgoing the loading of unwanted files.
6. Utilization of ‘trackBy’ in addition to ‘ngFOR’
When the array is changed, Angular developers can use ‘ngFor’ to re-render the complete DOM tree. In a contrast to re-rendering the full DOM, this enables Angular to perform DOM changes specific to the particular array. The resources are strained unnecessarily, and re-rendering the entire DOM takes longer than using “trackBy,” which lets you define the changes independently. When using “ngFor,” for example;
Now, the entire DOM tree will be re-rendered whenever modifications are made. When you employ ‘trackBy’ functions, like
7. Optimizing the Angular Folders and Files
It’s crucial to organize and optimize the Angular folders for simple maintenance, readable information, and quick access to any material. The Angular project’s overall success largely depends on consistency. The following Angular folder best practices can help you organize your Angular resources.
7.1 Naming of the File
As per the standards of naming Angular files, the two vital things that one needs to keep in consideration are:
- Convey the purpose of the files and folders through the name
- Follow consistency in the naming pattern which is “–file features.filetype”.
- (For instance, consultation.component.ts, auth.servce.ts, component.html.)
- You may include more descriptive definitions of the file names, like one may use (-) for segregating the word in the name – tc-home.component.ts, book-appointment.component.ts.
7.2 Naming of Class
While naming the classes, always use the style of upper camel case with the additional suffix representing the file type – TcHomeComponent, AuthService.
7.3 Structure of the Folder
It’s crucial to understand that Angular uses Angular Modules to closely combine related functionality, which is one of the most important things to know about it. An Angular folder structure best practice is to use Angular modules. Each module needs its folder, which should be given the same name as the module. Although Angular does not differentiate between the various Modules, we should categorize our modules for ease of understanding.
The most significant Angular Modules are:
7.3.1 Root Module
This module is essential in starting an Angular app. All the root components and other modules are loaded by this module. Root Modules are also known as AppModule and can be created via the/src/app folder.
7.3.2 Feature Module
As its name implies, a feature module implements a particular feature of an Angular application. The feature module includes all the related pipes, elements, and directives that aid in its implementation. Under the module folder, one can build sub-folders for your directives and pipes. To organize all the components in one location, create a components folder. In contrast to the basic notion of the Angular API, having a feature module is a great practice.
7.3.3 Shared Module
The next aspect is shared modules. An Angular project’s shared modules would help to streamline and organize the code. One can assemble all the regularly used components, pipes, and directives into the same module and then import the whole module as and when needed in any portion of your application.
7.3.4 Core Module
A core module was developed to specify the shared services of your Angular application. A Core Module defines the services as an instance only once. Because it contains singleton services that any component of your Angular app can access, this module is imported from the main module. Only the root module should be used to import the core module.
8. Building Reusable Components
A tenet of Angular.js best practices that cannot be overlooked is the creation of reusable components. Create a component for each UI element in your Angular project that you know you will use repeatedly, then use the component. As a result, the UI element will be used consistently throughout the app. Also, you won’t need to alter the UI code in countless locations if your app needs to be redesigned for some reason. The component needs to be changed, and then you’re ready to go.
9. Using Index.ts
Index.ts enables Angular developers to maintain everything related together tightly so they don’t have to worry about the name of the source file. This contributes to introductory statements being shorter. As an illustration, we can check /heroes/index.ts as
One can import anything and everything through the source folder name
10. Avoidance of Logic in the Component
Often developers jumble together the business logic and the components, creating a confusing tangle that is difficult to understand. As a result, it’s crucial to adhere to the Angular 2 development best practices and keep the functionality distinct from the components.
Benefits of separating logic and components UI and component testing is done differently from logic testing. To increase code quality and scalability for Business Logic, many services are employed. You can utilize logic in many components if it’s part of a different service. As a result, there would be less code and a smaller build size.
11. Prevention of Memory Leaks
When an application wrongly manages memory allocations, the result is a progressive loss of available computer space since the old memory isn’t effectively relinquished. When the code that is currently running cannot access an object that is stored in memory, a memory leak may also occur.
A few critical suggestions and the best practices for safeguarding the developed Angular app from memory leaks are
11.1 Usage of async pipes
To certainly avoid memory leaks, you can either use observables or async pipe. It is advised to avoid binding an observable in view and subscribing to it in the component. So, the observable approach must be fully implemented to lower the likelihood of a memory leak.
11.2 Usage of take
When a new value is identified, the operator “take(1)” allows the value to be taken without being subscribed. It will make sure that you only ever receive data once, effectively eliminating data breaches.
11.3 employing “takeUntill”
When you wish to keep an eye on two observables and terminate the subscription when they emit a value or are finished, you can also use the takeUntill operator. It helps you maintain your confidence that your observables won’t leak until they provide their intended value.
Now, in the ‘ngOnDestroy()’ field, use commands like “ngUnsubscribe.next()” and “this.ngUnsubscribe.complete()” to stop the emission from occurring as soon as the component is destroyed. The process follows as
12. Document Always
Documentation should always be considered credible. To make it easier for the other developers working on the project to grasp the logic, intent, and purpose of your code, provide comments on it. It improves the code’s readable nature and aids in code management. Also, note the purpose and function of each method and variable.
By using these Angular best practices, you may speed up the development of your Angular project and cut down on the amount of money and resources that are wasted. Use these Angular best practices in 2023 to stay ahead of the competition and give your clients the finest Angular experience possible when using your web applications.