Want to create a custom popup box without using libraries? In this beginner-friendly tutorial, you’ll learn how to build a simple modal popup in JavaScript — using just HTML, CSS, and vanilla JS.

This is a must-know mini-project for any developer building user interfaces. Modals are perfect for alerts, login forms, notifications, or custom popups on any web page.

In this video, you’ll learn:

How to build the modal structure with HTML & CSS

How to open and close the modal using JavaScript

Use of classList, display, and event listeners

Adding overlay and fade effects for smooth UX

Bonus: Best practices for accessibility and mobile responsiveness

Perfect for JavaScript beginners, students, or anyone looking to add modals to personal websites, portfolios, or real-world projects.

Watch more in our JavaScript Tutorials Playlist for hands-on UI projects and DOM scripting tricks!

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