In this presentation, Marc shows how to make an Override or Alternate Layout, but only with CSS. This is possible with CSS Grid. This way of making Overrides is very handy for different reasons:
No HTML and no PHP is required.
You can have (completely) different layouts according to the viewport and so be mobile-first.
In many cases, you can just copy-paste your CSS from one template to another and it will work immediately.
It requires less maintenance than when you create a "real" Override / Alternate layout.
Joomla 4's frontend is largely based on CSS Grid. So you should be learning CSS Grid anyway!
Watch video Making CSS-only Overrides with CSS Grid in Joomla with Marc Dechèvre online without registration, duration hours minute second in high quality. This video was added by user Joomlashack 21 December 2020, don't forget to share it with your friends and acquaintances, it has been viewed on our site 1,664 once and liked it 24 people.