what does ::before really do?

what does ::before really do?

html css google-chrome css-selectors

google-chrome

What does this operator (::) in CSS mean? [duplicate]

html css google-chrome webkit css-selectors

google-chrome

querySelector with nested nth-child in Chrome doesn't appear to work

css google-chrome css-selectors

google-chrome

How/why is “ *[attribute^="string" ” a valid querySelector? (JS bug?)

javascript css google-chrome css-selectors

google-chrome

Webkit bug with `:hover` and multiple adjacent-sibling selectors

css google-chrome safari webkit css-selectors

google-chrome

Ignoring Webkit-specific CSS selector in Firefox

css firefox google-chrome webkit css-selectors

google-chrome

:not() selector not behaving the same between Safari and Chrome/Firefox

css google-chrome firefox safari css-selectors

google-chrome

CSS: Disable Header & Footer From Print Preview Chrome

javascript css google-chrome css-selectors print-css

google-chrome

A :focus-within workaround for edge

css google-chrome css-selectors microsoft-edge

google-chrome

Combine CSS Attribute and Pseudo-Element Selectors?

css google-chrome css-selectors pseudo-element

google-chrome

Why doesn't this CSS selector work: a:hover ~ span?

css google-chrome webkit css-selectors

google-chrome

Odd Behavior with CSS :first-child:before in Chrome

css google-chrome pseudo-element css-selectors

google-chrome

Chrome and CSS attribute selector

html css google-chrome css-selectors

google-chrome

:target selector on dynamic generated element not affect

html css google-chrome css-selectors

google-chrome

Why isn't my !important attribute working in Google Chrome?

css google-chrome firebug css-selectors firebug-lite

google-chrome