Best Practices to follow in Angular Development– Part I

Best Practices to follow in Angular Development– Part I
Angular is one of the most popular MVC pattern MVVM frameworks of the 21st century. Developed by Google, Angular is significantly used for building dynamic mobile, web, desktop apps using TypeScript, and HTML. The initial version of Angular was Angular JS. AngularJS development had created ripples in the software world when it released. Furthermore, this proactive team kept releasing updated versions at regular intervals to keep up with changing times. Recently, its latest version Angular10 was released in the market which created a buzz in the software world.
But to meet the high-end requirements of modern-day users, it is essential to not only use the next-gen framework like Angular but also follow a certain set of standard development practices. So in this blog, we have enlisted some of the top Angular app development practices that developers can learn and follow. But before we get started, let us have a quick look at the benefits of following these practices, rather tips.
Noticeable Benefits of Following the Angular Development Best Practices
  • Helps in Creating a Clean Code
  • Aids in Maintaining the Coding Standards
  • Helps in Minimizing the Developmental Time
  • Ensures a Minimal Score on the Bugs and Issues
  • Ensures Improved Performance of the End-product
  • Makes Code Management and Debugging Easier

Highlights of the Top Angular App Development Practices

Rules to follow for Angular Coding Styles
Following certain standard coding styles instead of the common styles during Angular app development can ensure the writing of simple and adaptable code and a good user-experience. Here are the rules to be followed for Angular coding styles:
  • The code per function shouldn’t exceed 75 lines
  • The code per file should not exceed 400 lines
  • It is good to declare the values of variables with ‘const’ if those values are intact
  • While sharing feature area for all slider components, developers should use a custom prefix
  • You can use shortcuts for files with similarly naming conventions. For instance, you may use hero.component.ts|html|css|spec for naming different files with the same names
  • In case you usually prefix the names for database, table, field, etc., avoid this practice for Interface names like AbastractShape and iShape
  • Apply single responsibility symbol to services, components, and symbols since it allows to create a more readable and cleaner app format.
Best Security Practices in Angular
Security is of utmost importance in any application. In Angular, security lapses can result in a dangerous threats, for instance, cross-site scripting. This issue can result in the passing of controls on the client side resulting in the alteration of the web pages. For avoiding such attacks, the developers should be aware of some security practices in the Angular framework as mentioned below:
  • Maintain the Angular Libraries on Regular Intervals
  • Update Angular libraries for every new update from Google
  • Prevent the XSS cross-site security issues
For doing this, it is necessary to consider the measures like DOM sanitization service, Offline template compiler, sanitization and security contexts, context security policy, etc. These will help to keep the attackers away from client-side apps ensuring higher security.
Routing in Angular and related Practices to Consider
Routing in Angular is performed to either display or hide components as and when needed by the users. Routing makes the components available for the development process whenever required, thus reducing constant trips to the server. However, bad routing practices can result in disorganized Angular apps at some point. So, for ensuring these issues don’t exist, the developers need to understand some basics about adding templates and components into the app along with the appropriate functioning of the routes. Have a glance at the best practices concerning Angular routing:
  • Developing the routes module wise
  • Routing with lazy loading
  • Organizing routes guards
  • Lazy loading routes with Preload
Preventing Observable Memory Leaks
Unlike any other framework, Angular, too, has observable memory leaks. Observables are of great use in Angular as they help in streamlining important data. But at the same time, leaks in observables can cause critical issues in mobile app development. Please follow the below-mentioned tips to avoid these leaks:
  • Use ‘async pipe’: these are built-in attributes that come in handy when the developers need to mark the components for emitted values. Also, they unsubscribe automatically from observables and thus prevent unnecessary memory leakages.
  • Use ‘take(1)’: This is an operator that allows you to get the data just once and helps to easily avoid memory leaks.
  • Use ‘takeUntil’: This is another operator that should be used when you wish to monitor second Observables and destroy the subscription; once the Observables gets completed or emits the value; thus, preventing the Observables to be leaked.
Usage of Template Directive
In Angular, ‘ngFor’ comes as a built-in template directive and is used for building new templates in the applications for every item. So, the Angular developers can rather use ‘trackBy’ directive every time they use ngFor. So, instead of rendering the complete DOM tree, ‘trackBy’ will help in creating customized and unique identifiers for every item.
Utilizing the most powerful accessibility tool- Angular CLI
Angular Command-Line Interface (CLI) already follows all the standard practices during Angular app development. It eases out the development process. It helps to test, debug, maintain, and deploy the applications. So, the developers should use it for developing an initial-level structure for the Angular app. They must use Angular CLI for the generation of new modules, directives, services, components, pipes, classes, etc. while creating any files and folders, instead of doing it manually. The usage of this interface decreases JavaScript fatigue and complexity.

A Few Other Recommended Practices

  • Naming Conventions for readability and maintainability
  • Maintaining the folder structure properly
  • Utilizing service workers for ensuring that the apps become highly responsive
  • Isolating all the API hacks in one place
  • Breaking down the larger components into multiple smaller components
  • Ensuring proper documentation of code, every variable, and the methods used
  • Using state management libraries for managing state transitions
In our upcoming blog, we will explain these practices in detail and also include some more tips and practices that all the Angular development services should follow. Also, here is our blog on the “Potential mistakes that developers must avoid during Angular development!

Key Takeaways:

For designing a comprehensive application that becomes lucrative as well as popular, it is essential to implement the best developmental methods. So here, we have mentioned some of these methods which are tried and tested by the experienced Angular developers who have worked on versatile projects for years. Every Angular/Angular JS app development company should consider these tips and train their developers beforehand to refrain from any major mistakes in the projects.
With this, we come to the end!
We hope this blog was an insightful read for you and the practices mentioned here will make your Angular app development quite simpler and interesting.
If you have any such practices to share with us, do comment below.
We would like to hear about your experiences too!

Angular 10- Top Features and Modifications that You Must Know!

Angular 10- Top Features and Modifications that You Must Know!
Angular 10 updates
Angular, the TypeScript-based, JavaScript-compiled, Google-developed framework, has been prevalent in the software industry since 2009. Over time, this framework has proved highly efficient for developing intuitive and dynamic applications as required by diverse industrial sectors. Consequently, most businesses these days prefer Angular for app development. As such, increasing demand for Angularjs app development services has been observed globally. And this is obvious because, since the inception of Angular, it has come a long way releasing several advanced versions successfully in quick progression. AngularJS is known to be its first version and later, Angular 2, Angular 4, Angular 5, Angular 6, Angular 8, and Angular 9 were released. Recently, on 24 June 2020, its latest version- Angular 10 was released in the market. So let us explore this update in detail.

Angular 10 and its Value Offerings

Angular 10 update looks quite smaller than its previous versions but is an effective attempt of the Angular team to keep this framework relevant and up-to-date. This time, they have emphasized more on improving quality, ecosystem, and tools rather than new features. Every Angular App Development Company must be well versed with the top updates of this version. The noteworthy updates are as follows:
Angular 10 features
CommonJS import Warnings
CommonJS was originally meant for designing the server-side modules and not for reducing the production package size. When the AngularJS app developers make use of dependencies bundled with CommonJS, it results in larger code bundles and ultimately slow performing applications. But after this update, the developers will automatically be notified in case a CommonJS module pulls into your build.
New Date Range Picker
The new date range picker is another update in the Angular UI Material component library. The components mat date input range and mat date picker range can be used for using this range picker.
Optional Stricter Settings
Angular 10 comes with a stricter project set-up for the creation of a new workspace using “ng new”. Activating the flag- “ng new-strict” can initialize the new project just with a few settings. These settings enhance maintainability, enable the CLI to optimize the app functions in an advanced manner, and also help to identify the bugs well ahead of time. Also, the “strict” flag reduces default bundle budgets by up to 75%, changes template type checking to Strict, it selects strict mode in TypeScript, allows advanced tree-shaking to configure the app as free of side-effects, preventing declarations of type any by configuring linting rules.
Updates in JS Ecosystem
The Angular team has made a few modifications for keeping the framework synchronized and up-to-date with the JavaScript Ecosystem. For instance, TypeScript is updated to TypeScript 3.9, the static analysis tool for TypeScript- TSLint has been updated to v6, and the runtime library for TypeScript- TSLib has been updated to v2.0. They have also upgraded the project layout. There is an additional tsconfig.base.json file as well which provides enhanced support to the way build tooling and IDEs resolve type and package configurations. Due to these updates, every AngularJS app development company can leverage these functionalities to the fullest for architecting responsive, user-friendly, and customizable apps and other software projects.
Bugs Resolutions
The Angular team has focused more on problem-solving during this update. They have worked with the community and made bigger contributions this time as about 700 issues were completely resolved considering the overall framework components and tools. The issues of ranges in the parser, Terser Inlining Bug, errors created due to migration when the symbol does not exist, etc. were fixed. Additionally, 2,000 more issues were touched.
Advanced browser Configurations
Browser configurations of Angular have been updated so that the new projects can exclude less used as well as older browsers like Internet Explorer 9, 10, Internet Explorer Web, etc. The Angular app developers can add the browsers that need to be supported in the .browserslistrc file, for enabling ES5 builds and differential loading for browsers.
Some Deprecations
In Angular 10, several unimportant sections have been removed. For example, the Angular Package Format doesn’t include FESM5 or ESM5 bundles anymore. This saves about 119MB of install- and download- time, while running yarn or npm install for the libraries and packages in Angular. Since any down-levelling for supporting the ES5 is performed at the end of the build process, these formats aren’t needed any longer.
Also, WrappedValue is deprecated. Probably, it will be removed in v12. WrappedValue was useful for triggering change detection even if the same object instance was emitted or produced. When WrappedValue is utilized, there is a performance cost and this functionality is useful in relatively rare cases. As a result, the Angular team may have decided to drop it.
Additional Features and Updates
  • The team has added a program-based entry-point finder- EntryPointFinder in Angular version 10.  This is supposedly faster than DirectoryWalkerEntryPointFinder.
  • A compiler interface has been introduced during this update that covers the actual ngtsc compiler. With the use of the project interface, the language service-specific compiler can manage several Typecheck files while also building Scriptinfos as needed.
  • In Angular 10, the team has removed Autocompletion from HTML entities like &amp, due to certain performance issues and problematic value.
  • It is now possible to configure Async locking timeouts which adds support for the ngcc.config.js file. This sets the retryDelay and retryAttempts options for the AsyncLocker.
  • The team has also made type-checking performance enhancements to the compiler-CLI.
  • Angular version 10 supports the merging of several translation files. Before this version, only a single translation file was permitted per locale. Now it is possible to specify multiple files per locale for the users and with the help of messaging ID, the transactions from every file will be merged.
  • For performance improvement, the Angular team has made computation of basePaths lazy, so, the work will be performed in TargetedEntryPointFinder only if required. Before this version, the basePaths got computed as and when the finder got instantiated even though the entry-point was already processed. This was a waste of effort which has now been handled.
  • Urlmatcher’s type now indicates clearly that it can always return null.
  • Improved performance due to a decrease in the size of the entrypoint manifest and implementing a caching technique in the manifest.

Final Verdict:

With incredible features, some removals, and some modifications, Angular has enriched itself and become all the more powerful. Owing to features like data linking, reusing of web elements, tooling, etc. along with Google’s vibrant community support, the popularity of angularjs web app development and angularjs mobile app development has exponentially risen.
With this, we come to the end of our topic. We hope this blog was knowledgeable and helpful to you!