Book Image

Vue.js Quick Start Guide

By : Ajdin Imsirovic
Book Image

Vue.js Quick Start Guide

By: Ajdin Imsirovic

Overview of this book

Vue.js is the latest trending frontend framework. Simplicity, reactivity, and ?exibility are some of the key benefits that Vue offers to developers. This book will help you learn everything you need to know to build stunning reactive web apps with Vue.js 2 quickly and easily. This book will take you through the Vue 2 framework. You will start by learning the different Vue installation options: CDN, NPM, and Vue CLI. Then we will look at the core concepts of Vue: templates and components – ways to modularize Vue code. You will learn how to utilize directives, which are Vue-specific HTML attributes with additional features. Also, you will see how Vue uses a streamlined approach to development, with reusable methods, computed properties, and watchers, and how it controls state with the help of its data option. You will learn about the concepts of reactive programming in Vue, and how to understand communication between parent and child components. We will take a look at props and slots, working with CSS, filters, and mixins. We will also look at ways to add transitions and animations to Vue apps. Then you will extend Vue by building custom directives and your own plugins. Finally, you will learn about Vuex – a Vue plugin that allows us to centralize state, and also introduce Nuxt, which is a framework that builds on top of Vue and solves some issues of single-page applications. After learning about these components, you will be ready to build your own reactive web apps with Vue.js 2.
Table of Contents (15 chapters)
Title Page
Copyright and Credits
Packt Upsell

Building a fruit counter app with Vuex

The app that we will build is just a simple fruit counter app. The goal is to help the user make sure to eat five pieces of fruit daily, and we will set up a simple app that will start with five pieces of fruit to eat and, each time we click the button, it will decrement the number by 1. That way, we can keep track of our healthy eating goals.

We will begin our app by setting the initial state, with only one key-value pair in it: 

const store = new Vuex.Store({
  state: {
    count: 5

Next, we will set up getters. As we learned already, getters only return state:

  getters: {
    counter(state) {
      return state.count;

Next, we will add two mutations: the first mutation, decrementCounter, will operate on the counter by decrementing it by the value stored in the payload argument. We will decrement the value of state.count until it reaches 0. To make sure the value of state.count cannot be less then 0, we'll check it with the ternary statement...