There are a few things that CSS shapes need in order to function and display as desired. First, they need to be floated. Next, they need a coordinate system to control how they are drawn and where they are placed. And this coordinate system needs an origin.
When you began building websites did you expect content to wrap around a floated image with transparency? Did you think that the first time you created a floated circle with a 50% border radius that the content would flow around it in an arc? And each time you did, did you yell to yourself, why is this not possible? Well, this used to be a real problem on the web, but now we have CSS Shapes.
So what exactly are CSS Shapes? Well, it’s probably easiest to understand what they are by contrasting them with what they are not. So let's look at some examples.
When designing for print, the sky is the limit. We can really push the envelope especially when it comes to layout. We can wrap content around any shape we’d like. But on the web, everything is contained within rectangles. We’ve been pretty creative while building in this boxy world but what if we could break free and build designs more similar to those found in editorial design?
For the longest time we’ve been stuck with boxes and it makes things that are common yet beautiful in the print world difficult if not impossible on the web. CSS shapes change this, leveling the playing field allowing us to create much more engaging layouts and designs on the web.