Saturday, August 11, 2012

HTML: Attributes


Attributes provide additional information about HTML elements.

HTML Attributes
  • HTML elements can have attributes
  • Attributes provide additional information about an element
  • Attributes are always specified in the start tag
  • Attributes come in name/value pairs like: name="value"

Attribute Example
HTML links are defined with the <a> tag. The link address is specified in the href attribute:
Example
<a href="http://www.w3schools.com">This is a link</a>


Always Quote Attribute Values
Attribute values should always be enclosed in quotes.

Double style quotes are the most common, but single style quotes are also allowed.
Remark Tip: In some rare situations, when the attribute value itself contains quotes, it is necessary to use single quotes: name='John "ShotGun" Nelson'


HTML Tip: Use Lowercase Attributes
Attribute names and attribute values are case-insensitive.
However, the World Wide Web Consortium (W3C) recommends lowercase attributes/attribute values in their HTML 4 recommendation.

Newer versions of (X)HTML will demand lowercase attributes.


HTML Attributes Reference
A complete list of legal attributes for each HTML element is listed in our:


Below is a list of some attributes that are standard for most HTML elements:

Attribute
Value
Description
class
classname
Specifies a classname for an element
id
id
Specifies a unique id for an element
style
style_definition
Specifies an inline style for an element
title
tooltip_text 
Specifies extra information about an element (displayed as a tool tip)

For more information about standard attributes:


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