HTML id Attribute

HTML Standard Attributes

Definition and Usage

The id attribute is a unique identification for a HTML element.

The id attribute is often used with CSS or JavaScript (using the HTML DOM) to style or change the HTML element with the specified unique id.

The id must be unique within the HTML document, this means that you can only use the id once on a page, but re-use it on another page.

Alone, the id attribute does not affect the display style of the element.

Syntax

<element id="id">Some text or element</element>

OR

<element id="id" />

Support

W3C: The "W3C" column indicates whether or not the attribute is defined in the W3C HTML/XHTML recommendation.

Example

Try-It-Yourself Demos

Id in HTML elements
How to set the id attribute to a few different elements.

The id attribute and CSS
How to use the id attribute with a CSS stylesheet.

The id attribute and JavaScript
How to use the id attribute with a JavaScript.

HTML Standard Attributes

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