Book Image

Angular for Enterprise-Ready Web Applications - Second Edition

By : Doguhan Uluca
Book Image

Angular for Enterprise-Ready Web Applications - Second Edition

By: Doguhan Uluca

Overview of this book

This second edition of Angular for Enterprise-Ready Web Applications is updated with in-depth coverage of the evergreen Angular platform. You’ll start by mastering Angular programming fundamentals. Using the Kanban method and GitHub tools, you’ll build great-looking apps with Angular Material and also leverage reactive programming patterns with RxJS, discover the flux pattern with NgRx, become familiar with automated testing, utilize continuous integration using CircleCI, and deploy your app to the cloud using Vercel Now and GCloud. You will then learn how to design and develop line-of-business apps using router-first architecture with observable data anchors, demonstrated through oft-used recipes like master/detail views, and data tables with pagination and forms. Next, you’ll discover robust authentication and authorization design demonstrated via integration with Firebase, API documentation using Swagger, and API implementation using the MEAN stack. Finally, you will learn about DevOps using Docker, build a highly available cloud infrastructure on AWS, capture user behavior with Google Analytics, and perform load testing. By the end of the book, you’ll be familiar with the entire gamut of modern web development and full-stack architecture, learning patterns and practices to be successful as an individual developer on the web or as a team in the enterprise.
Table of Contents (19 chapters)
15
Another Book You May Enjoy
16
Index

Using Angular Services and HttpClient to retrieve data

Now you need to connect your CurrentWeather component to the OpenWeatherMap APIs to pull live weather data. However, we don't want to insert this code directly into our component. If we did this, we would have to update the component if the API changed. Now imagine an app with dozens or hundreds of views and imagine how this would create a significant maintainability challenge.

Instead, we'll leverage an Angular service, a singleton class, which can provide the current weather information to our component and abstract away the source of the data. The abstraction decouples the UI from the Web API. Leveraging this separation of concerns, in the future, we could enhance our service to pull from multiple APIs or a local cache to load weather information without having to change the UI code.

In the upcoming sections, we'll go over the following steps to accomplish this goal:

  1. Creating a new Angular...