UPDATE: There is now an aspect-ratio CSS property which can be used to set the ratio between width and height. The best way to make a square is now aspect-ratio: 1 / 1 If you remember the days of floats and table layouts, display: flex is absolutely magical... until you want
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Let's face it, writing unit tests is hard. Many new coders take a long time to get into unit testing. They're scary, a lot of effort, and it's difficult to understand how they work. When we do eek out a few unit tests, they don't seem to be proving anything.
When you're starting out with CSS and the web, it's easy to get into frameworks like Bootstrap, or Bulma. They're an excellent tool for fast prototyping, and getting to grips with how to build a website. However, these frameworks are opinionated, and as we grow we hit a point where