I wanted to share a little trick that I use a lot when building responsive sites that can be a huge help for your front-end performance, which I call the “resize timer”:
Imagine the following scenario: you have a series of horizontally-aligned boxes on your page, which should be equal height. Of course, this is easy to pull off with Flexbox, but browser support isn’t exactly where we want it just yet. Use it where you can, of course, but you might still need a JavaScript-based fallback for older browsers.