ID selector (CSS)
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Revision as of 10:04, 16 February 2016 by Karl Jones (Talk | contribs) (Karl Jones moved page ID rule (CSS) to ID selector (CSS))
In CSS, an ID rule (or ID style rule, or ID style) is a style rule which selects zero or one HTML element based on the element's ID attribute.
Description
An ID rule must apply exactly one HTML element on a page (or no HTML element at all).
No two HTML elements on a given web page may have the same value for their ID attributes.
Example
ID style rule:
#example { color: red}
Element affected by rule:
<div id="example">...</div>
In the above example, div is an arbitrary HTML element. Any other type of HTML element works the same.
