Common Selectors

These selectors include the type, class, and ID selectors.

The type selector identifies an element based on its type, specifically how that element is declared within HTML. The class selector identifies an element based on its class attribute value, which may be reused on multiple elements as necessary to help share popular styles. Lastly, the ID selector identifies an element based on its ID attribute value, which is unique and should only be used once per page.

h1 {...}
.tagline {...}
#intro {...}