If you’ve done any website development lately you’re sure to be familiar with Bootstrap, a web framework that makes many things much easier to code. Bootstrap is perhaps best known as one of the first/best frameworks for “responsive” web pages, that is: web pages that automatically reconfigure themselves to best fit the viewing device screen size, whether it be full-size personal computer monitor, tablet, or smartphone.
The way bootstrap does this is with grid CSS classes, that look like
.col-md-* and are based on a 12 column system.
So you might have some HTML that looks like:
This markup gives you a 12 column row first, then a 2 column row with the first column taking up 2/3 of the width and the second column taking 1/3, then a 3 column row each with equal width (1/3), and then a 2 column row, each with equal width (1/2).
Simple right? What I didn’t realize when I was first introduced to Bootstrap, and is kind of the whole point, is that you can specify the way your page renders for each device size, as so:
This markup means each div in each row will take 1/4 the width on large (lg) screens, 1/3 on medium (md), 1/2 on small (sm), and the whole row on extra-small (xs) screens. Simple!