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 Feb 16 2025
1. Elegant Alert/Confirm/Toast Dialog Box In JavaScript – Cute Alert
A Vanilla JavaScript dialog popup library to create alert notifications, confirm popup boxes, and toast messages on the web app.
2. Resizable & Draggable Dialog In Pure JavaScript
A vanilla JavaScript library to create a draggable & resizable dialog popup without any frameworks or libraries (e.g. jQuery UI).
3. Advanced Dialog & Modal Plugin For Bootstrap 5 – bs5dialog
A JavaScript plugin to create alert/confirm/prompt popups, loading indicators, toast notifications, and dialog windows using Bootstrap 5 styles.

4. Notification/Dialog/Loading Indicator JavaScript Library – Fnon
A multifunctional popup box library for creating toast notifications, alert/confirm dialog boxes, and various types of loading indicators on the web app.
5. Easily Build Confirmation Popups with the confirmDialog.js Library
A compact and sleek JavaScript library for building custom confirmation dialogs that enhance user experience. Built-in support for 5 languages (English, French, Spanish, German, Portuguese) and easy expansion for global reach.
6. Draggable/Resizable/Maximizable/Minimizable Dialog Window Library – winbox
An open-source, zero-dependency JavaScript library for creating draggable, resizable, maximizable, and minimizable dialog windows on the app.
7. Customizable Alerts & Dialogs Made Easy – Yoyo Popup
A JavaScript library that creates customizable toast alerts, confirmation dialogs, and modal popups. It currently comes with five distinct types—info, question, success, warning, and danger—each with its own icon for immediate identification.

8. Create Bootstrap 5 Modals Programmatically With JavaScript – bs_dialogs.js
Just another JavaScript library that allows you to dynamically create modal dialogs using Bootstrap 5’s Modal component.
9. Accessible Modal Dialog With CSS3 Animations
An accessible and CSS3 animated modal component built with JavaScript and native HTML dialog element.
10. Toast/Popup/Modal/Dialog JavaScript Library – JSFrame.js
A lightweight JavaScript alternative to default alert() and confirm() dialog boxes that make them easy to customize via CSS and 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.