What does the double colon (::) mean in CSS?
css
Solution
It means pseudo element selector. It means the element to the right doesn't exist in the normal DOM, but can be selected.
A pseudo-element is made of two colons (::) followed by the name of the pseudo-element.
Source
It was originally only a single colon, but was changed to differentiate it from pseudo classes (like `:hover`, `:first-child`, `:not` etc). It's best to use `:` for `before` and `after` pseudo elements since the single colon has better browser support, namely in earlier IE versions.
Problem
What does the double colon (`::`) mean in CSS? For example: ``` input[type=text]::-ms-clear { display: none; } ```