Vue.js is simple and powerful, and it is easy to learn. Once you understand the basics of the framework, everything will work in just the way you expect. The framework will help you to keep focused on writing the logic of your application instead of remembering a bunch of APIs that are hard to use.

In this chapter, you will do the following:

• Learn fundamental concepts in Vue.js
• Learn how the Vue.js reactivity system works
• Learn about the internal implementation of Vue.js
• Learn about Vue.js logic and designs

Along the way, we will create a sample application. It will show you how Vue.js works and you can write the application step by step as you read. And, by the end of this chapter, you will have a single-page application (SPA) that demonstrates most of the features in Vue.js 2, and you will have a deep understanding of how Vue.js works internally.