Detect the file type of a file, stream, or data
LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve
High performance (jankfree) lazy loader for images (including responsive images), iframes and scripts (widgets).
A JavaScript library for zooming images like Medium