How do I set the properties of background image to be responsive?

Question

I inserted the image by using the url () on the body tag on the css , but when I see it on a phone it is cutoff. so how do I make it resize on a phone?

Answer 1

Set "background-size" css property to "contain" or "cover" special keywords:
https://developer.mozilla.org/en-US/docs/Web/CSS/background-size

Answer 2

tnx for the link it worked for the cover and some positioning.