Clean Alert/Confirm Dialog In JavaScript – Modal.js
Modal.js is a configurable JavaScript popup box library for creating customizable, modal-style alert and confirmation dialog boxes on the webpage.
JavaScript & CSS Alert
Pretty Non-blocking Dialog Popup JavaScript Plugin – Prompt-Boxes
The Prompt-Boxes JavaScript plugin used to create nice, clean alert/confirm/prompt dialog boxes and toast-like notification popups on your web app.
Simple Customizable Modal Dialog JavaScript Plugin – popupmodal.js
popupmodal.js is a vanilla JavaScript plugin helps you create responsive, customizable modal dialog popups with ease.
Beautiful Native Javascript Alert Replacement – Sweet Alert
Sweet Alert is a pretty and highly customizable JS modal dialog library to replace the native Javascript alert, confirm and prompt dialogs.
Powerful Dialog & Popup JavaScript Library – dndod
dndod is a dependency-free JavaScript library that helps you create flexible, customizable alert/confirm dialogs, notification popups, and modal windows.
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.
Sweet Flat Notification JavaScript Library – notify.js
A lightweight JavaScript library to create sweet, flat-style alert/toast notification popups on the page.
Minimal Toast/Dialog Popup In Pure JavaScript – ui-notify
A super small, CSS-less JavaScript toaster library that helps create minimal, clean toast notifications and alert/confirmation dialog popups.
Small JavaScript Alert & Confirm Dialog Replacement – Custom Alert
custom-alert is a lightweight JavaScript alternative to default alert() and confirm() dialog boxes that make them easy to customize via CSS and JavaScript.
Pretty Animated Popup JavaScript Library – x0popup
Just another JavaScript popup library which creates animated, good-looking and highly customizable popup windows to replace the native alert, confirm, prompt dialog boxes.