Introduction of Vue 3 JS – 1

This chapter provide the basic example, how to create the Vue 3 JS app

You can read more detail about the vue3 JS installation

https://v3.vuejs.org/guide/installation.html

Example:

In this example, we can see the basic tag to create Vue3 app, and how we can use data and methods in Vue JS.

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Vue Basics</title>
    <link
      href="https://fonts.googleapis.com/css2?family=Jost:wght@400;700&display=swap"
      rel="stylesheet"
    />
    <link rel="stylesheet" href="styles.css" />
    <script src="https://unpkg.com/vue@next" defer></script>
    <script src="app.js" defer></script>
  </head>
  <body>
    <header>
      <h1>Vue 3 Course </h1>
    </header>
    <section id="course-goal">
      <h2>Course Details</h2>
      <!-- or you can use  <p v-html="outputGoal()"></p> -->
      <p>{{ outputGoal() }}</p>
      <p>Learn more <a v-bind:href="vueLink">about Vue</a>.</p>
    </section>
  </body>
</html>

app.js

const app = Vue.createApp({
  data() {
    return {
      courseGoalA: 'Learn Vue3 and Finsh the course',
      courseGoalB: 'Master in Vue apps!',
      vueLink: 'https://vuejs.org/'
    };
  },
  methods: {
    outputGoal() {
      const randomNumber = Math.random();
      if (randomNumber < 0.5) {
        return this.courseGoalA;
      } else {
        return this.courseGoalB;
      }
    }
  }
});

app.mount("#course-goal");

style.css

* {
  box-sizing: border-box;
}

html {
  font-family: 'Rajadhani', sans-serif;
}

body {
  margin: 0;
}

header {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
  margin: 3rem auto;
  border-radius: 10px;
  padding: 1rem;
  background-color: #2196e4;
  color: white;
  text-align: center;
  width: 90%;
  max-width: 40rem;
}

#course-goal{
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
  margin: 3rem auto;
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  width: 90%;
  max-width: 40rem;
}

#course-goal h2 {
  font-size: 2rem;
  border-bottom: 1px solid #ccc;
  color: #2196e4;
  margin: 0 0 1rem 0;
}

#course-goal p {
  font-size: 1.25rem;
  font-weight: bold;
  border: 1px solid #2196e4;
  background-color: #2196e4;
  color: white;
  padding: 0.5rem;
  border-radius: 5px;
}

#course-goal input {
  font: inherit;
  border: 1px solid #ccc;
}

#course-goal input:focus {
  outline: none;
  border-color: #2196e4;
  background-color: #d7fdeb;
}

#course-goal button {
  font: inherit;
  cursor: pointer;
  border: 1px solid #0355b3;
  background-color: #0355b3;
  color: white;
  padding: 0.05rem 1rem;
  box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.26);
}

#course-goal button:hover,
#course-goalbutton:active {
  background-color: #0355b3;
  border-color: #0355b3;
  box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.26);
}

OUTPUT: