Mastering Vue.js 3: A Comprehensive Guide to Building Reusable Components

Welcome fellow coders! 👋 In today's step-by-step tutorial, we will take a deep dive into Vue.js 3, with a specific focus on building clean, reusable components. 🚀 Vue.js is an increasingly popular JavaScript framework for building user interfaces. Its greatest strength lies in its simplicity and flexibility, especially in creating reusable code. Let's get started. 🏁

Step 1: Setup the Environment

First, we need to set up our development environment. We'll start by creating a new Vue.js project with Vue CLI:

npm install -g @vue/cli@latest
vue create my-vue-app

This will create a new Vue.js project in a directory named my-vue-app. Traverse into the directory:

cd my-vue-app

Now that we have our Vue.js project up and running, we can start building our components 👨‍💻

Step 2: Creating a Reusable Component

For this tutorial, let's create a simple, reusable 'ProgressBar' component. First, let's create a new file ProgressBar.vue under components directory.

touch src/components/ProgressBar.vue

Now, let's put in some code. A single file Vue component has three parts: <template> for HTML, <script> for JavaScript, and <style> for CSS.

<template>
  <div class="progress-bar">
    <div :style="{width: progress + '%'}"></div>
  </div>
</template>

<script>
export default {
  name: 'ProgressBar',
  props: {
    progress: {
      type: Number,
      required: true
    }
  }
}
</script>

<style scoped>
.progress-bar {
  background: #f4f4f4;
  border-radius: 10px;
  overflow: hidden;
}
.progress-bar div {
  height: 20px;
  background: #5cb85c;
}
</style>

With the above code, we have created a reusable 'ProgressBar' component with a progress prop. The component displays a green progress bar according to the progress value passed to it.

Step 3: Using the Component

Now, let's use this component in our App.vue:

<template>
  <div>
    <h1>Loading...</h1>
    <ProgressBar :progress="50" />
  </div>
</template>

<script>
import ProgressBar from './components/ProgressBar'

export default {
  components: {
    ProgressBar
  }
}
</script>

Voila! 🎉 We've successfully created a reusable 'ProgressBar' component using Vue.js 3.

Remember folks, good code is reusable, testable, and maintainable so always strive to write reusable components whenever you can. Happy coding and will catch you in the next blog post!

References:

• Vue CLI - Installation
• Vue.js - Introduction
• Single File Components

Please note, as technology evolves quickly, the links in this blog post may be outdated. Always refer to the official Vue.js documentation which is regularly updated.

Happy Coding! 👩‍💻 🎉