In modern web development, developers can now quickly create popup boxes or other interactive components with the <DIALOG> element introduced in HTML 5.2.
<dialog open> <p>CSSSCRIPT.COM</p> </dialog>
However, what needs to be worth noting is that the new <DIALOG> element only works with Chrome, Firefox, Opera, and Android webview.
Developers who are running cross-platform web apps might need a Polyfill to enable the <DIALOG> support on the Edge and Apple Safari.
Or use a third-party JavaScript dialog library:
Here is a list of the 10 best JavaScript dialog/popup box plugins that help you create customizable, advanced, cross-browser alert/confirm/prompt dialog boxes. Feel free to download and use them in your next web project. Have fun.
Originally Published Oct 22 2019, updated Mar 07 2022
1. Custom Alert/Confirm/Prompt Popup Box JavaScript Library – attention.js
A vanilla JavaScript plugin used for creating custom alert, confirm or prompt dialog boxes on the page.
2/ Lightweight Draggable Popup Window In Vanilla JavaScript – Window Engine
A zero-dependency JavaScript library to create nice clean mobile-friendly popup windows that are moveable via mouse drag and touch events.
3. Minimal Alert, Confirm, And Toast Dialog In JavaScript – Asteroid Alert
A standalone JavaScript dialog popup library to create minimal, modern alert & confirm dialog boxes and toast-like notification popups using pure JavaScript.

4. duDialog
A pure JavaScript plugin for creating Material Design inspired alert, confirmation, selection dialog popups without any dependencies.
5. Small JavaScript Alert & Confirm Dialog Replacement – Custom Alert
A lightweight JavaScript alternative to default alert() and confirm() dialog boxes that make them easy to customize via CSS and JavaScript.
6. Beautiful Dialog Box Library Inspired By Material Design – SoloAlert

A JavaScript library for creating responsive, beautiful popup boxes (like alert, confirm, and prompt dialog boxes) as seen on Google Android (Material Design).
7. Mobile-first Dialog Popup JavaScript Library – mcx-dialog-mobile
mcx-dialog-mobile is a pure JavaScript plugin to create mobile-first, iOS-inspired dialog popups (alert/confirm dialog, action sheet, loading spinner, toast notification) on your web app.
8. Elegant Popup Box (Alert, Confirm, Prompt) In JavaScript – QuantumAlert
A simple-to-use JavaScript library for creating elegant, customizable dialog boxes to replace the browser alert, confirm, and prompt popup boxes.
9. Custom Dialog Boxes With Bootstrap 5 Modal Component – BS-DIALOGS
A JavaScript library that utilizes the Bootstrap 5 modal component to create custom dialog boxes like alert notifications, confirm dialogs, and prompt popup boxes.
10. Modal.js
A vanilla JavaScript library for creating highly customizable alert and/or confirmation dialog boxes using plain JavaScript.
Read More:
To display complex web content (e.g. forms, images, videos) in a popup box, you might need a customizable modal window to overlay the content on the top of page.
Check out our Modal & Popup section for more information.
See Also: