When position fixed doesn't work?

Answer 1

I guess, it doesn't work when element is inline

Answer 2

It moves away with its container

Answer 3

It is for interview. Without code

Answer 4

Can you be more explicit ? What doesn't work ? Can you share your code ?

Answer 5

notice the setting of parent

https://code.sololearn.com/Wuu2GIKv0ESB/?ref=app

https://code.sololearn.com/W720iRgpnTZr/?ref=app