The modal animation is hardware accelerated on Safari and iOS, which gives notable performance improvements. The animations are available in Chrome but will feel more sluggish. Firefox will see the opacity transition but not the bounce or minimise animation as it doesn’t yet support @keyframe.
However, it won’t work in IE8 and below, there’s no pointer-event support and opacity is poorly implemented. IE9 supports :target but no pointer-events. Some IE specific styles could easily switch the opacity toggle to a display or visibility one.
Requirements: Chrome or Firefox Browser
License: License Free