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>
</pree>

In the above example, <code>div</code> is an arbitrary HTML element.  Any other type of HTML element works the same.

== See also ==

* [[Cascading Style Sheets]]
* [[ID rule (CSS)]]
* [[Style sheet (web design)]]