If you don’t know, now you now – CodePen.io is a great tool for Front-End development! Codepen is made by Chris Coyier – the grand master of CSS. Codepen is a great tool for building HTML/CSS/JSS projects. It features a live update, so there’s no need to refresh the page after putting something together. You can also easily add libraries and pre-processors such as jQuery, Jade, Angular. Just about every popular library, framework, and processor is available to use.
Another great feature of this website is the showcase. Here, you can see what other developers have created to give you ideas of not only how a particular language can be used, but also to inspire new ideas for what you already know. CSS3 is really starting to turn up some cool uses. It’s making browsers rely less on JavaScript for interactions and animations.
Check out my profile at https://codepen.io/rtro92/, and feel free to follow me!