Top 5 Angular JS Best Practices

Posted by Stephen Foster on December 14th, 2021

AngularJS is one of the most popular front end JavaScript web frameworks used for developing dynamic, single-page mobile and web applications. Developed and maintained by Google, this platform does not require any introduction. AngularJS framework with its standout functionality and an array of features simplifies the development and testing of high-performing apps. Companies seek experienced developers for angularjs consulting services to develop cross-platform compatible, single-page applications that project the best brand image and promote businesses.

Adopting AngularJS best practices facilitate developers to build secure and scalable apps with enhanced quality of coding that requires the least time and energy for maintenance. With clean, easy to modify coding, developers ensure that the apps meet the clients’ needs and future expectations.

Here is a checklist of 5 AngularJS best practices used to optimize the Angular app performance:

1. Use Track By instead of ngFor
   ngFor is an Angular directive used to iterate the objects that should be used properly lest it will destroy the app’s performance. Using ngFor attracts issues when there is a need to substitute the repetitive data. Angular does not keep an account of repetitive data and ignore the data that is added or deleted. Developers can use Track By that renders a distinctive identifier for every item in the collection.
2. Use Lazy Loading
   Lazy load is a built-in feature of Angular that can escalate the performance and speed of your application. It ensures that your application loads only essential components and prevent other irrelevant files from opening. It distributes the whole application into several bundles to control its speed. Thus, the components that are connected to the active route gets loaded.
3. Avoid Memory Leaks
   Memory leaks are a common problem that exists in almost every language, library, and framework. Observables in Angular consolidate the entire data onto a single path, but memory leaks is a severe issue that needs attention. You can use async pipe and try not to subscribe to observables and tie them up with the modules to prevent memory leaks. Also, you can use take(1), and takeUntil operators that effectively prevent memory leaking.
4. Use ES6 Features:
   ES6 means ECMA Script 6, published in 2015 to standardize JavaScript. ES6 is the updated version of JavaScript that has several properties and functionalities to utilize while developing Angular applications. It features the spread operator denoted by three dots (…) and is used to broaden the array into individual elements. You can also use let and const at the place of var to avoid facing the complexities that occur due to var.
5. Abide by the Angular Coding Practices
   Expert AngiularJS developers providing angularjs consulting services lay stress on using standard coding practices, that helps come up with the clean, simple, adaptable, and understandable codes. A single file should possess only 400 lines of code. Each function should possess only 75 lines of code. All symbols should have consistent names. The function name should be meaningful and in the lower camel case. Leave an empty line between modules and imports. Use custom made prefix for each slider component.

The list is not all-inclusive. Many other practices facilitate developers to write clean codes and build high performing apps.