Related Articles
Angular Best Practices
Introduction
AngularJS is an open-source JavaScript framework for building front-end applications released by Google. It is considered one of the most widely used and popular JavaScript frameworks for developing dynamic desktop and mobile applications. The Angular framework is managed and maintained by the engineers working at Google. It gained immediate support because now static HTML pages could be made interactive and customized according to the requirements.
Currently, there are more than 40% of front-end developers using Angular because of its wide popularity. It is constructive activity to highlight a few practices that we are appreciative of.
In this blog, we’re going to talk about the Angular best practices that a web developer should keep in mind while developing a project and code easier to manage and debug. So, without any further delay, let’s get started!
Top 7 Angular Best Practices to Follow in 2021
- Isolate API hacks
As we all know that all APIs are not bulletproof. Sometimes it is required to add some logic in the code to make up for bugs in the APIs. Rather than having hacks in components where they are needed, it is a good practice to isolate them in one place — like using a service from the component. You must be wondering, why is it necessary? If so, then it helps to keep the hacks closer to the API which requires less coding and deals with the un-hacked code
It also allows you to create custom tags similar to TODO and tag the fixes so that it becomes easier for developers to search and find the required API.
- Use Angular CLI
One of the powerful and most widely used tools available for developing applications in Angular CLI. It makes it easy to build an app and follows all the best practices. It is a command-line interface tool that is used to develop, maintain, initialize, and test and debug Angular apps. So instead of creating files manually, make sure you’re using Angular CLI to generate new modules, services, components, and pipes.
| # Install Angular CLI
npm install -g @angular/cli
# Check Angular CLI version
ng version |
- Subscribe in the template
Rather than subscribing to observables from components, make sure to subscribe to the observables from the templates because async pipes unsubscribe themselves automatically to make the code simple by avoiding the need to manually manage subscriptions. It helps to reduce the risk of forgetting to unsubscribe a subscription in the component and detect unsubscribe observables.
It also stops components from introducing bugs where the data gets mutated outside the subscription.
Before:
| // // template
<p>{{ textToDisplay }}</p>
// component
iAmAnObservable .pipe( map(value => value.item), takeUntil(this._destroyed$) ) .subscribe(item => this.textToDisplay = item); |
After:
| <p>{{ textToDisplay$ | async }}</p>
this.textToDisplay$ = iAmAnObservable .pipe( map(value => value.item) ); |
- Maintain proper folder structure
While developing an Angular app, make sure that the structure of folders is managed well because it is an important factor that should be considered before starting your project. A well-organized folder structure will easily adapt to the new changes that take place during the development process.
| ├── src
│ ├── app │ │ ├── admin │ │ │ ├── components │ │ │ │ ├── shared.component.ts │ │ │ ├── directives │ │ │ │ ├── first.directive.ts │ │ │ │ ├── another.directive.ts │ │ │ ├── pages │ │ │ │ ├── dashboard │ │ │ │ │ ├── dashboard.component.ts │ │ │ │ ├── rights │ │ │ │ │ ├── rights.component.ts │ │ │ │ ├── user │ │ │ │ │ ├── user.component.ts │ │ │ │ ├── admin.component.ts │ │ │ │ ├── admin.component.html │ │ │ │ ├── admin.component.css │ │ │ │ ├── index.ts │ │ │ ├── pipes │ │ │ │ ├── first.pipe.ts │ │ │ │ ├── another.pipe.ts │ │ │ ├── admin.module.ts │ │ │ ├── admin.routing.module.ts │ │ │ ├── index.ts
|
- Use the Lazy Loading Feature Module
Using the lazy loading feature in your Angular app helps to increase productivity and developers can load the thing which is required for the project. For instance, while utilizing the lazy loading feature, it loads the components and other related things which are required to build a project and stops unnecessary files from getting loaded. You must be wondering, how does it work? If so, then here it is:
Before:
| // app.routing.ts
{ path: ‘not-lazy-loaded’, component: NotLazyLoadedComponent } |
Here the ‘LazyLoading‘ is not placed, so you will end up creating unnecessarily heavy-sized applications. But if you’re using lazy loading, then it will help you to reduce the app size by abstaining from unnecessary file loading.
After:
| // app.routing.ts
{ path: ‘lazy-load’, loadChildren: ‘lazy-load.module#LazyLoadModule’ }
// lazy-load.module.ts import { NgModule } from ‘@angular/core’; import { CommonModule } from ‘@angular/common’; import { RouterModule } from ‘@angular/router’; import { LazyLoadComponent } from ‘./lazy-load.component’;
@NgModule({ imports: [ CommonModule, RouterModule.forChild([ { path: ”, component: LazyLoadComponent } ]) ], declarations: [ LazyLoadComponent ] }) export class LazyModule {} |
- Modular Development
As we all know that apps developed using Angular are super quick because of modular development. A fully-fledged and feature-ready web application contains various modules with different functionalities and refers to dividing an app into several parts. For instance, a large app with a bulk of content like social networking sites has few essential routes in the root component whereas other modules are divided according to the functionalities.
Modular development is used for clean application structure which allows load children property to apply to app modules that identify the routes and increase user engagement.
For instance:
| “const routes: Routes = [
{
path: ‘items’,
loadChildren: () => import(‘./items/items.module’).then(m => m.ItemsModule)
}
];” |
- Avoid any type
Make sure that you’re declaring the variables and constants with proper types other than any. It will help to reduce unintended problems and provides additional benefits of having good typings in your Angular application. If your constants and variables are properly typed, then you’ll get a compile-time error as shown here:
| interface IProfile {
id: number; name: string; age: number; } export class LocationInfoComponent implements OnInit { userInfo: IProfile; constructor() { } ngOnInit() { this.userInfo = { id: 12345, name: ‘test name’, mobile: 121212 } } } // Error |
Source
Final Words
Developing and using applications is a constant journey that is continuously improving things around the world. Here is the list of top angular practices that developers must adapt in 2021 for the best user experience with less buggy and performant applications.
We hope you enjoyed reading the article and make sure to follow the angular best practices before starting your development process. Do you think we missed out on any top practices for Angular development? If so, then feel free to approach in the comment section below.
Happy coding techie!!
