Slick Content Loader With Vanilla JavaScript – slick-loader
A small and developer-friendly content loader JavaScript library for the web.
JavaScript & CSS loading indicator
Elegant Notification Popup JavaScript Library – Notiflix
Notiflix is a flexible, powerful and customizable notification popup library which sends different types of notification messages to the user.
Highly Customizable Skeleton Loader In Pure CSS – Skeleton Mammoth
A CSS library for creating customizable skeleton loaders to provide a visual placeholder while the content loads.
Facebook Inspired Skeleton Loader In Pure CSS – Placeholder Loading
This is the pure CSS solution to create simple, animated, customizable skeleton loading effect as you’ve seen on Facebook.
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.
Build Interactive Customizable Popups And Alerts with AsPopup.js
A popup JavaScript library for modal windows, loading indicators, toast messages, and alert/confirm/prompt dialogs.
Radial Progress Indicator For Click-and-hold Actions – HoldCircleJS
A JavaScript library to create sleek, customizable radial progress indicators for improved click-and hold feedback.
Fancy Three-dots Loading Spinners With Pure CSS – Three Dots
Three Dots is a small CSS/CSS3 library that provides a set of 19 fancy animated loading spinners created with three dots.
Detect and Display Website Loading Progress – Siteloader
An easy-to-use JavaScript library designed to provide real-time, precise loading progress detection for web pages.
Simple Toast Notification & Loading Indicator JavaScript Library – popular-message.js
A JavaScript library that helps create toast-like info/success/warning/error notifications and loading indicators on your modern web apps.