Use the :indeterminate CSS pseudo-class to match different elements with an indeterminate state.
The text-align-last property defines the text-alignment of the last paragraph line. It can be valuable with justified text designs.
dialogelement is more than a display toggle because it provides better focus handling,
inertfunctionality and closes on keypress.
Learn how the !important CSS keyword affect the cascade and differs from user agent, user and author stylesheets.
Learn how to transition in a background from one side and make it disappear at another using CSS pseudo-elements.