:empty selector not working in css

Question

i used :empty selector in .error class. the problem is that even when there is no content inside the div with class of error, the error class is n

Answer 1

it is because

(demo) is not empty, it has a text node as the child.

:empty

The :empty pseudo-class represents any element that has no children at all. Only element nodes and text (including whitespace) are considered. Comments or processing instructions do not affect whether an element is considered empty or not.

Try

Demo: Fiddle