Vue Components: Bootstrap Alerts

I’m dabbling with Vue version 3. Here’s Part 1 of 2 in generating a reusable component.

Introduction

Let’s build this. A simple Vue app which demonstrates a reusable notification by way of Bootstrap 4 alerts.

What’s the Goal?

Create a reusable component that displays different types of notifications.

What will we need?

  • Stackblitz – to quickly prototype a Vue project and its dependencies.
  • Bootstrap 4 – to grab some ready-made user interfaces (e.g. alerts).

Step By Step

Step 1: Create Vue App

Step 2: Install Dependencies

Enter additional dependencies such as bootstrap (jquery and popper is optional but I added it anyway).

Step 3: Add Dependencies to main.js

const { createApp } = require("vue");
import App from "./App.vue";
import "bootstrap"; // Add this import.
import "bootstrap/dist/css/bootstrap.css"; // Add this import.

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

Step 4: Modify HelloWorld.vue Component

Out of box, Stackblitz generates a default Vue project paired with a component called HelloWorld.vue.

We’ll repurpose most of this by first renaming it to Notifications.vue.

The Component Code

Debrief of the Notifications component code:

  • Line 2: class binding is assigned passing in a type object.
  • Line 3: apply a slot so HTML can be used in full.
  • Lines 13-15: the prop defined to pass in what type of alert to display.

Debrief of the App component code:

  • Lines 12-14: type attribute will pass in the specific bootstrap class to style the alert.
  • Line 13: the HTML from here will be inserted to the slot assigned in the Notifications component.

Key Takeaways

We’ve now created a reusable component which is dynamic enough to apply Bootstrap’s variety of alerts as well as the ability to pass in a message with full HTML by way of slots.

Additional Resources