What is the difference between visibility:hidden and display:none?

Question

The CSS rules visibility:hidden and display:none both result in the element not being visible. Are these synonyms?

Answer 1

There is a big difference when it comes to child nodes. For example: If you have a parent div and a nested child div. So if you write like this:

In this case none of the divs will be visible. But if you write like this:

Then the child div will be visible whereas the parent div will not be shown.