object-fit and object-position are my two favourite CSS properties lately. They give developers control over the content inside an img or a video similar to| CSS-Tricks
This will do you fine these days (IE 8 and up):| CSS-Tricks
1. Introduction| drafts.csswg.org
Learn about CSS comparison functions min(), max(), and clamp()| ishadeed.com
Our comprehensive guide to CSS grid, focusing on all the settings both for the grid parent container and the grid child elements.| CSS-Tricks
I had a little situation the other day where I needed to make one of those aspect-ratio friendly boxes. This isn't particularly new stuff. I think the| CSS-Tricks