The library is standalone + lightweight (2kb minifed + gzipped) and comes with an easy-to-use API.
It has smooth animations, a built-in CSS spinner and replaces
prompt out of the box.
Vex also works well on mobile browsers and its design can be customized quickly.
Requirements: No Requirements
Compatibility: All Major Browsers
It is so good that the web gets more and more lightweight with the use of modern web technologies.
Few days ago, WRD had shared the pure CSS gallery and now CSS Modal, a solution to create modal boxes with CSS.
They can be used to display any HTML content and designed to work in responsive layouts.
Compatibility: All Modern Browsers