https://openclassrooms.com/courses/qu-est-ce-que-le-responsive-web-design
Related: Veille responsive designWhat The Heck Is Responsive Web Design? Responsive websites respond to their environment Adaptive (Multiple Fixed Width Layouts) or Responsive (Multiple Fluid Grid Layouts) Recommended Approach A Simple Device Diagram for Responsive Design Planning Updated for 2015! Check out Analytics-driven responsive web design planning At Metal Toad we're big fans of responsive design, but a common snag in the responsive planning process comes when choosing what device widths to design to. Just yesterday we had a big internal debate over what the best widths to design to are for 3 layout sites, 4 layout sites, etc. I'll get to our conclusions below, but another important distinction to call out is that for each layout there are two things to consider: what the pixel width range for a specific layout should be, and what pixel width the designer should create the PSDs at. There are an ever-increasing number of devices with different screen resolutions to take into account with a responsive design, so we put together a simple but handy diagram that lists the most common device widths as of the present, along with overlays for potential device width ranges.
8 Ways to Add a Responsive Navigation Menu on Your Site By Jacob Gube There are plenty of techniques for implementing responsive navigation menus on your site. One of your options: Build your menu from scratch. There are many tutorials on the Web for that if you need to learn how. But some of us may just be interested in getting the task done as quickly and as painlessly as possible. In this case, you could use open source code.