JS Bin is an open-source collaborative web development debugging tool1. It’s designed to help JavaScript and CSS developers test snippets of code, within some context, and debug the code collaboratively1. JS Bin allows you to edit and test JavaScript and HTML1. It also supports other languages like Markdown, Jade, and Sass2. The complete output of the code is shared with other developers, colleagues, and/or students2.

Our comprehensive guide to CSS flexbox layout. This complete guide explains everything about flexbox, focusing on all the different possible properties for the parent element (the flex container) and the child elements (the flex items). It also includes history, demos, patterns, and a browser support chart.