Difference between revisions of "ID selector (CSS)"

Revision as of 12:13, 9 February 2016

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.

See also

• Cascading Style Sheets
• Class rule (CSS)
• Style sheet (web design)