Book Image

Vue.js 3 By Example

By : John Au-Yeung
Book Image

Vue.js 3 By Example

By: John Au-Yeung

Overview of this book

With its huge ecosystem and wide adoption, Vue is one of the leading frameworks thanks to its ease of use when developing applications. However, it can get challenging for aspiring Vue.js developers to make sense of the ecosystem and build meaningful applications. This book will help you understand how you can leverage Vue effectively to develop impressive apps quickly using its latest version – Vue 3.0. The book takes an example-based approach to help you get to grips with the basics of Vue 3 and create a simple application by exploring features such as components and directives. You'll then enhance your app building skills by learning how to test the app with Jest and Vue Test Utils. As you advance, you'll understand how to write non-web apps with Vue 3, create cross-platform desktop apps with the Electron plugin, and build a multi-purpose mobile app with Vue and Ionic. You'll also be able to develop web apps with Vue 3 that interact well with GraphQL APIs. Finally, you'll build a chat app that performs real-time communication using Vue 3 and Laravel. By the end of this Vue.js book, you'll have developed the skills you need to build real-world apps using Vue 3 by working through a range of projects.
Table of Contents (10 chapters)

Unit testing with Jest

Testing is an important part of any app. When we refer to tests, we usually mean automated tests. These are tests that we can run in quick repetition to make sure that our code is not broken. When any tests fail, we know that our code did not do what it was doing before. Either we created a bug, or the tests are outdated. Because we can run them quickly, we can write many of them and run them as we build our code.

This is much preferred to manual tests, which must be done by a person doing the same actions over and over again. Manual tests are boring for the tester, they are error-prone, and are very slow. It is just not a pleasant experience for anyone. Therefore, it is better to write as many automated tests as possible to minimize the manual tests.

If the instructions that are shown in the Vue CLI are followed, it is very easy to add skeleton test code without doing any extra work. The files for unit tests should be automatically generated for us. We...