Vue.js Essentials

1. Introduction

Vue.js is a progressive JavaScript framework for building user interfaces. It is designed to be incrementally adoptable, making it easy to integrate with other projects. Vue is often compared with frameworks like React and Angular, but it maintains its own unique approach to building applications.

2. Key Concepts

• Reactive Data Binding
• Components
• Directives
• Vue CLI
• Single File Components (SFC)

3. Installation

Vue.js can be included in your project via CDN or installed through npm. Here’s how to do it:

npm install vue

Alternatively, you can include it via CDN:

<script src="https://cdn.jsdelivr.net/npm/vue@2"></script>

4. Components

Components are reusable Vue instances with a name. You can create a component as follows:

Vue.component('my-component', {
                template: '<div>Hello, Vue!</div>'
            });

5. Reactivity

Vue's reactivity system makes it simple to manage state and respond to changes. Here's how you can create a reactive data property:

new Vue({
                el: '#app',
                data: {
                    message: 'Hello Vue!'
                }
            });

6. Routing

Vue Router is the official router for Vue.js. To set it up, install it via npm:

npm install vue-router

Then, configure routes in your application:

const routes = [
                { path: '/home', component: Home },
                { path: '/about', component: About }
            ];

7. State Management

Vuex is a state management pattern + library for Vue.js applications. To install Vuex:

npm install vuex

Then, create a store:

import Vuex from 'vuex';
            const store = new Vuex.Store({
                state: { count: 0 },
                mutations: {
                    increment(state) {
                        state.count++;
                    }
                }
            });