⚠️ All typical warnings apply when you’re taking web-dev advice from me ⚠️
You can use it to fill a container with an image (or any replace element ).
Unless you’re exceptionally lucky, your images don’t always fit perfectly into the containers you need them to.
For example, here I’m trying to get this egg to fit into a nice round parent. But it’s not the right size.
Even a cheeky attempt to replicate the curvature with “border-radius” ends badly,
But with object-fit: cover;, magic!
That’s just the start of object-fit’s powers, read more here.
Fast forward to me anguishing for 30 minutes about why the card images on my home page aren’t filling the card!
MDN Docs couldn’t help.
Turns out, for object-fit to work, the image itself needs both a height & a width set. Without them, no fit.
In most cases, you will probably be setting to 100% for both, to match the parent size. I’m not sure why that’s not the default.
Alas, I hope this will save you a few minutes of despair.