Question

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

Answer 1

display:none means that the tag in question will not appear on the page at all (although you can still interact with it through the dom). There will be no space allocated for it between the other tags.

visibility:hidden means that unlike display:none, the tag is not visible, but space is allocated for it on the page. The tag is rendered, it just isn’t seen on the page.

For example:

test | <span style='[style-tag-value]'>Appropriate style in this tag</span> | test 

Replacing [style-tag-value] with display:none results in:

test |   | test 

Replacing [style-tag-value] with visibility:hidden results in:

test |                        | test