Angular Best Practices To Build Clean and Performant Web Applications

1
(No Transcript)
2
Angular Best Practices to Build Web Applications

• Angular, a completely rewritten version of the
  AngularJS framework created and maintained by
  Google, is specifically intended for developing
  dynamic programming structures. Modules,
  components, metadata, templates, data binding,
  services, directives, and dependency injection
  are the fundamental building blocks of Angular.
• It frequently develops a wide range of additional
  internal platforms for developing SPAs with
  cutting-edge tools including HTML, CSS, and
  Typescript. Furthermore, as is well known,
  TypeScript development services are a superscript
  of the JavaScript framework, which is
  specifically employed in the creation of Angular
  apps.
• We can develop UI applications that are more
  robust and compatible by utilising Angular
  technology. Due to these features, Angular will
  continue to rank among the most widely used
  front-end frameworks in 2023. To make it simple,
  we have created an article that outlines the
  angular js best practices that every developer
  should adopt to create reliable online
  applications.

3
14 Angular Best Practices That You Need To Follow

• The greatest framework for creating strong,
  feature-rich web applications for your business
  requirements is Angular. Read the post on what is
  Angular to learn more about the Angular
  framework. Let's now examine some of the top
  Angular best practices that you must adhere to in
  2023 for developing powerful online applications.

• Angular CLI
• Use ES6 Functionality
• Maintaining Proper Folder Structure
• Make a Habit of Using Lazy Loading
• Angular Coding Practices
• Using trackBy Along With ngFor
• Using Interfaces
• Single Responsibility Principle

• Make a Habit of Using Safe Navigation Operator
  (?)
• Prevent Memory Leaks in Angular Observable
• Using index.ts
• Build Reusable Components
• Using Immutability
• Implementing Lazy Loading

4
1. Angular CLI

• A comprehensive and powerful tool, Angular CLI
  (Angular Command Line Interface) aids in the
  startup, development, maintenance, testing, and
  even debugging of Angular apps. The primary
  purpose of the Angular command line interface
  tool is to streamline scheduling and the entire
  strategy.
• So, when using CLI for your in-house Angular
  applications, you must know the essential
  functions of Angular CLI. So, if you want to
  install CLI using NPM packages, you must use npm
  install -g _at_angular/cli.
• Angular CLI makes it simple to start the app
  development process and is regarded as one of the
  simplest ways to comprehend business logic,
  regardless of whether another developer has
  worked on it. It will eventually lower many costs
  and provide engineers with more time.

5

• Now, let us explore some of the commands that
  help you deal with Angular CLI commands.
• ng new To create a new Angular app from scratch
  and can start a fully functional application
  right out of the box.
• ng create To use test shells for creating
  components, routes, services, and pipes with a
  single command.
• ng serve It is primarily used for an application
  that is developed locally and needs to be tested
  in the developing phase.
• ng test It is used to run end-to-end or local
  unit testing of the most common command.
• ng lint It plays a vital role in creating a code
  shine using its own lint rules.
• ng add _at_angular/pwa If you want to set up an
  Angular service worker.

6
2. Use ES6 Functionality

• ES6 stands for ECMAScript 6, and it gives you the
  ability to work with new syntax and angular
  features to create code that is more up-to-date
  and comprehensible. New features and functions
  are continually added to ES6.
• You can frequently programme JavaScript more
  easily thanks to ES6 capabilities like Let and
  Const, Arrow Functions, and Object Literals
  string interpolation.

7
3. Maintaining Proper Folder Structure

• Maintaining file and folder structures that make
  your work easier is one of the most popular
  Angular-recommended practices. Let's examine the
  naming conventions for files and classes as well
  as the structure of the folder hierarchy in an
  Angular project.
• File Naming
• Class Naming
• Folder Structure

8
4. Make a Habit of Using Lazy Loading

• Different modules, such as documents, JS, CSS,
  videos, photos, etc., are often loaded slowly. It
  is exclusively in charge of accelerating the
  application's load time, and it typically does so
  by splitting the load into numerous packets and
  loading them as needed.
• Lazy loading can be useful to you while your
  large application loads rather than employing
  other related routines to accomplish a lazy load
  of the feature modules.
• When something is used, lazy load processing will
  begin. Instead of loading the component in the
  AppRoutingModule routes configuration, the
  Angular developers working for the top AngularJS
  development company use the lazy-loading function
  to loadChildren.

9
5. Angular Coding Practices

• You must adhere to Angular code standards, which
  is one of the most popular Angular best
  practises. It is a powerful method for creating
  mobile and online applications. To create Angular
  applications that offer the best user experience,
  you can adhere to specific coding standards.
• Full-stack developers find it difficult to
  address urgent problems and fix defects,
  especially when working with intricate code
  structures.

10

• Lets explore some angular code standards, as a
  part of Angular guidelines, need to follow to
  make web application development comply with the
  standard Angular style guide.
• Per file, the code must not exceed 400 lines
  limit
• Per function, the code must not exceed 75 lines
• Utilise custom prefixes to prevent element name
  collisions with components in other apps and with
  native HTML elements.
• If the values of the variables are intact,
  declare it with const
• Names of properties and methods should be in
  lower camelcase
• Always leave one empty line between imports and
  modules such as third-party and application
  imports and third-party module and custom module
• We shouldnt name our interfaces with the
  starting capital I letter as we do in some
  programming languages.

11
6. Using trackBy Along With ngFor

• ngFor allows Angular developers to quickly
  re-render the whole DOM tree after making any
  significant changes in the array. It will
  eventually help Angular make DOM changes specific
  to the defined array rather than re-rendering
  DOM.
• Angular re-renders is one such process that will
  take more loading process and typically take more
  time than utilizing trackBy.
• If you are using ngFor like
• ltulgt
• ltli ngfor "let item of collection"gt
  item.id lt/ligt
• lt/ulgt\

12
7. Using Interfaces

• Interfaces are crucial, especially when a
  contract for a class needs to be created.
  Additionally, it aids in the creation of the
  class needed to implement the functions and
  attributes specified in the interface.
• As an illustration, consider how the class
  HomeComponent implements the OnInit and OnDestroy
  methods in the Angular application.
• You may manage object literals with the help of
  interfaces. Our object must implement every
  property of the interface if it is an interface
  type.

13
8. Single Responsibility Principle

• Avoiding the creation of several components,
  services, or directives inside of a single file
  is one of the fundamental Angular best practices
  that every developer must adhere to.
• The single responsibility concept states that
  each file in an Angular application should only
  be in charge of creating a single, distinct
  functionality. We keep our files organised,
  readable, and maintained with the support of the
  single responsibility concept.

14
9. Make a Habit of Using Safe Navigation Operator
(?)

• To be on the safe side, programmers can only
  access a property directly from one object in a
  component's template by using the safe navigation
  operator.
• When attempting to access a property for a null
  object, an exception will be raised. The template
  will disregard the null value and access the
  property once the object is no longer null,
  however, if they develop a habit of using the
  save navigation (?) operator, they will be able
  to access it.

15
10. Prevent Memory Leaks in Angular Observable

• Nearly all programming languages, frameworks, and
  Angular libraries have observable memory leaks.
  And Angular is a perfect example of it.
• Every business need in Angular apps requires the
  use of observables, which are essential for
  developing and building Angular projects.
  Although it can just simplify application data, a
  memory leak is one of the serious problems that
  might happen if you are not paying attention. The
  worst condition can be produced in the middle of
  progress.
• Herere some of the tips that developers need to
  follow to avoid leaks.
• Using async pipe
• Using take(1)
• Using takeUntil()

16
11. Using index.ts

• index.ts helps you to keep all related things
  together so that they dont have to be bothered
  about the source file name. This helps reduce the
  size of the import statement.
• For example, we have article/index.ts as
• export from './article.model'
• export from './article.config'
• export ArticleComponent from './article.componen
  t'
• You can easily import all such things directly
  using the source folder name.
• import Article, ArticleConfig from '..article'

17
12. Build Reusable Components

• Build a component out of it and use the feature
  if you need to use UI throughout your Angular
  application.
• If the UI is drastically altered, it will save
  you a lot of trouble. Therefore, you do not need
  to update the UI code quality everywhere.
  Instead, all you need to do is alter the
  component's code.
• To accomplish this, you might need to employ
  property and event bindings to send inputs to the
  reusable components and receive output events
  from various components, respectively.

18
13. Using Immutability

• Javascript's reference types are objects and
  arrays. The ideal practice is to replicate them
  immutably into another object or an array before
  making changes to them.
• By upgrading such types immutably, we are
  preserving the original objects and arrays and
  modifying only their copies. The easiest way to
  modify objects and arrays immutably is by using
  the es6 spread operator ().

19
14. Implementing Lazy Loading

• You are strongly encouraged to include a lazy
  loading functionality, especially when working
  with applications that have multiple modules.
• The advantage of the lazy loading strategy is
  that resources can be quickly loaded when needed
  rather than all at once. They will eventually be
  able to cut down on startup time thanks to it.
  Applications are lazy loading modules as soon as
  a user navigates to their routes.

20
Conclusion

• We've learned about Angular's best practices for
  coding and other crucial elements that facilitate
  the development of Angular applications. You can
  create web applications with ease thanks to the
  Angular project framework. Additionally, there is
  always room for improvement in the manner in
  which we create software and code.
• We have covered all the key elements and best
  practices that organisations may utilise in their
  Angular development process to get the most out
  of it with our in-depth, opinionated article on
  the best practices.

21
THANK YOU
Contact Us (91) 991-308-8360 / 1 (912)
528-5566 inquiry_at_albiorixtech.com livealbiorix.te
ch For More Information Visit Us
At www.albiorixtech.com