HTML and CSS Reference
In-Depth Information
8.2. Style Syntax
The syntax of a styleits "rule," as you may have gleaned from our previ-
ous examplesis very straightforward.
8.2.1. The Basics
A style rule is made up of at least two basic parts: a selector , which is
the name of the HTML or XHTML markup element (tag name) that the
style rule affects, followed by a curly brace ( {} )-enclosed, semicolon-sep-
arated list of one or more style property:value pairs:
selector {property1:value1; property2:value1; ...}
For instance, we might define the color property for the contents of all
the level-1 header elements of our document to be the value green :
h1 {color: green}
In this example, H1 is the selector, which is also the name of the level-1
header element, color is the style property, and green is the value.
Most properties require at least one value, but may have two or more
values. Comma-separated values typically indicate a series of options as
accepted by the property, of which the first valid value applies to the
property, whereas space-separated values each apply separately to the
property. The last valid value may override a previous value:
selector {property3:value1 value2 value3}
selector {property4:value1, value2, value3}
 
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