vanilla-lazyload

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

focus-within-polyfill

Small vanilla javascript that feature detect the :focus-within pseudo selector and polyfills it with a standard css class if necessary.