Anaesthesia Read Before The American Dental Association Boston Mass August 5th 1880

Anesthesia (American English) or anaesthesia (British English) is a state of controlled, temporary loss of sensation or awareness that is induced for medical or veterinary purposes.

So I read the docs and probably understand the purpose of ::before and ::after. If my understanding is correct, they should always work in combination with other elements. But the web page I'm look...

The pseudo-element selectors (or ::before and ::after) are used to generate content on the fly for browsers, and the results are called generated content. The generated content does not belong to the document's DOM, and thus is invisible to devices like screen readers.

Anaesthesia Read Before The American Dental Association Boston Mass August 5th 1880 3

We publish original articles on all aspects of general and regional anaesthesia, intensive care and pain therapy, including research on equipment.

Anaesthesia Read Before The American Dental Association Boston Mass August 5th 1880 4

What is anaesthesia? Anaesthesia is given to patients so that surgery and other medical procedures can be carried out safely, and without pain. The word anaesthesia means ‘loss of sensation’. People under anaesthetic will ‘lose’ feelings of pain and other sensations.

There are different types of anaesthesia, ranging from an injection of a local anaesthetic to numb one small area (such as a finger or tooth) to general anaesthesia with temporary complete loss of consciousness.

Anaesthesia Read Before The American Dental Association Boston Mass August 5th 1880 6

Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free.

The ::before notation (with two colons) was introduced in CSS3 in order to establish a discrimination between pseudo-classes and pseudo-elements. Browsers also accept the notation :before introduced in CSS 2.

This depends on what you're actually trying to do. If you simply wish to apply styles to a :before pseudo-element when the a element matches a pseudo-class, you need to write a:hover:before or a:visited:before instead. Notice the pseudo-element comes after the pseudo-class (and in fact, at the very end of the entire selector). Notice also that they are two different things; calling them both ...