VueJS Component

Vue.js components are essential for creating adaptable and organized web applications. They let you divide your user interface into separate, self-sufficient sections, each handling its own specific part of the UI. This modular structure enhances the management and organization of complex applications. Leveraging components allows for code reuse throughout your application, which streamlines development and makes maintenance easier. This method not only fosters consistency but also makes updates and debugging simpler, resulting in applications that are easier to scale and maintain.

What are Components?

Vue.js Components are essential for creating custom, reusable elements in Vue applications. They bundle HTML, JavaScript, and CSS into modular units, enhancing scalability and maintainability. You can build your own components or use built-in ones.

Key Features of Vue.js Components

• Reactive Data Binding: Automatically updates the UI when data changes, simplifying DOM management.
• Encapsulation: Components encapsulate their structure and behavior, ensuring modularity and reducing interdependencies.
• Composition: Components can be nested within others, allowing complex UIs to be built from simpler components.
• Reusability: Components can be reused across the application, enhancing consistency and reducing code duplication.

Basic Structure of a Vue.js Component

A Vue.js component is composed of three main sections:

• Template: This section outlines the HTML layout and structure of the component.
• Script: Contains the logic for the component, including data properties, methods, and lifecycle hooks.
• Style: Defines the CSS that applies specifically to this component, ensuring styles are scoped and do not affect other parts of the application.

Example: Here’s a simple example of a Vue.js component.

export default {
  data() {
    return {
      name: "Vue.js",
    };
  },
  methods: {
    changeName() {
      this.name = "Vue Developer";
    },
  },
};

Steps to Creating a Vue.js Component

Vue.js components are essential for developing scalable and maintainable web applications. Here’s how to create and integrate a component into your Vue.js project:

Step 1: Install Vue CLI

Open your terminal and run the following command to install Vue CLI globally

npm install -g @vue/cli

Step 2: Create a New Vue Project by typing the following command in the terminal:

vue create my-vue-app
cd my-vue-app

Step 3: Navigate to the src folder of your project and create a new directory named components.

Step 4: Inside the components folder, create a file named UserCard.vue. Using PascalCase for filenames helps in maintaining consistency.

Step 5: UserCard.vue component might look like below:

Step 6: Import and register the UserCard component in your main entry file.

Step 7: Use the Component in App.vue, Include the component in your template to display user profiles with the provided data.

Project Structure:

Updated Dependencies:

"dependencies": {
    "core-js": "^3.8.3",
    "vue": "^3.2.13"
  }

Example: This example shows the creation of VueJS component.

// UserCard.vue
<template>
    <div class="user-card">
        <img :src="avatar" alt="User Avatar" class="avatar" />
        <h2>{{ name }}</h2>
        <p>{{ bio }}</p>
    </div>
</template>

<script>
export default {
    props: {
        name: {
            type: String,
            required: true
        },
        avatar: {
            type: String,
            required: true
        },
        bio: {
            type: String,
            default: 'This user prefers to keep their bio private.'
        }
    }
};
</script>

<style scoped>
.user-card {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 16px;
    max-width: 300px;
    text-align: center;
    background-color: #f9f9f9;
}

.avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
}
</style>

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

const app = createApp(App);
app.component('user-card', UserCard);
app.mount('#app');

// App.vue
<template>
    <div id="user-list">
        <user-card name="User 1"
            avatar="https://media.geeksforgeeks.org/wp-content
/uploads/20240802163129/WBJECA-exam-pattern.webp"
            bio="A passionate developer." />
        <user-card name="User 2"
            avatar="https://media.geeksforgeeks.org/wp-content
/uploads/20240730180108/Man-of-Steel.webp"
            bio="Enjoys hiking and photography." />
    </div>
</template>

<script>
// No additional script required here
</script>

<style>
#user-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
</style>

Step 8: Ensure your development environment is running to view the component in action:

npm run serve

Step 9: Open your application in a browser to verify that the usercard component is rendered correctly.

Output:

Conclusion

By following this guide, You’ve learned how to create and add a UserCard component to your Vue.js project, including how to build, register, and use it with dynamic data. Applying scoped styles and running the development server helps ensure everything works smoothly. Keep experimenting to build more advanced Vue.js components.

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Article Tags :

• JavaScript
• Web Technologies
• Vue.JS
• Vue.js Built-in Components