I'm a web developer. And when a container contains floated elements this means that they won't affect the height of their parent (the container). To fix this issue you need to either add overflow: auto, overflow: hidden or use a clearfix. Sometimes I forget to add this and as a result causing bugs that are found late in the development process causing a high amount of time spent on troubleshooting.
So, I'm trying to find something to integrate with my workflow that allows me to easier see if I have missed to clearfix any container who only have floated children (i.e find div element who has 0 height).