Vue.js v3 Application – Setup and Basics

Vue.js is a popular JavaScript framework for building user interfaces and single-page applications. In this article, we will go through the process of setting up a Vue.js v3 application and cover some of the basics.

Setup

To get started with Vue.js v3, you can use the Vue CLI (Command Line Interface) to quickly set up a new project. First, make sure you have Node.js installed on your machine. You can then install the Vue CLI globally using npm:

npm install -g @vue/cli

Once the Vue CLI is installed, you can create a new Vue.js project by running the following command in your terminal:

vue create my-vue-app

This will prompt you to choose a preset for your project. You can either select the default preset or manually select features such as Router or Vuex. Once the project is created, you can navigate to the project directory and start the development server:

cd my-vue-app
npm run serve

Now you have a basic Vue.js v3 application set up and running locally.

Basics

The entry point of a Vue.js v3 application is the main instance of the Vue constructor. This is typically defined in a file called main.js:

// main.js
import { createApp } from 'vue';
import App from './App.vue';

createApp(App).mount('#app');

In the code above, we import the createApp function from the Vue package and the root component of our application, App.vue. We then create a new Vue app instance and mount it to the DOM element with the ID of “app”.

Components are the building blocks of a Vue.js application. They encapsulate a piece of UI and can be composed together to form the entire application. Each component typically consists of a template, script, and style section:

<template>
  <div>
    <h1>Hello, Vue.js!</h1>
  </div>
</template>

<script>
export default {
  name: 'App',
  data() {
    return {
      message: 'Hello, Vue.js!'
    }
  }
}
</script>

<style>
h1 {
  color: #42b983;
}
</style>

In this App.vue component, we have a simple template with an h1 element, a script section defining the component’s data and a style section to style the h1 element. Each component can be reused and composed together to form the entire application.

This is just a basic introduction to setting up a Vue.js v3 application and covering some of the basics. In Part 2 of this article, we will explore more advanced features and concepts of Vue.js v3.