Chen Hui Jing covers some recent movement in DevTools:
Firefox’s grid inspector was pretty full-featured from the get-to and released together with CSS grid in Firefox 52. It was constantly improved upon since. Chrome added a basic grid inspector tool in Chrome 62 that let developers highlight elements using grid layout, but more robust features were only added in Chrome 87. And now, Webkit [sic] has joined the party, as Safari Technology Preview 123 adds Grid inspecting features as well.
You love to see it. DevTools have a massive impact on how front-end developers think about, build, and of course, debug websites. Stuff like seeing the numbered grid lines visually is a huge deal. I’ve done enough mentally counting what rows/columns I want to place things on, thank you very much.
