HTML Attributes

Attributes provide additional information about HTML elements.

HTML Attributes:

HTML elements can have attributes.
Attributes add extra information to elements.
Attributes are generally described in the opening tag.
Attributes always appear in name/value pairs, like name="value".

Example of Attributes:

HTML links are defined by the <a> tag. The link's address is specified in the href attribute:

Example:

<a href="http://www.webcode101.com">This is a link</a>

Quoting Attribute Values:

Attribute values should always be enclosed in quotes. Double quotes are most common, but single quotes are also acceptable.

Tip: In cases where the attribute value itself contains double quotes, single quotes must be used, e.g., name='John "ShotGun" Nelson'.

HTML Tip: Use Lowercase Attributes:

Attributes and attribute values are case-insensitive. However, the World Wide Web Consortium (W3C) recommends using lowercase for attributes/values in HTML4, and lowercase is required in newer (X)HTML versions.

HTML Attribute Reference:

For a complete list of HTML attributes, refer to the HTML Tags Reference Manual.

Here are some attributes applicable to most HTML elements:

Attribute	Description
class	Defines one or more class names for the HTML element (class names are used in stylesheets).
id	Defines a unique id for the element.
style	Specifies inline styles for the element.
title	Provides additional information about the element (displayed as a tooltip).