Responsive Web Design is about using HTML and CSS to automatically resize, hide, shrink, or enlarge, a website, to make it look good on all devices (desktops, tablets, and phones). It is very cool.
Do I really know about responsive design? Maybe just a little bit. Good to learn <picture> function for various sizes of images. It is very nice when thinking of loading speed. Another nice thing I’ve learned in week 6 is * { box-sizing: border-box; }. Need practice more to get familiar with it. To write CSS code under “@media” screen is tricky but it is fun.
There are still lots to learn.