HTML5 Attributes As explained in previous chapter, elements may contain attributes that are used to set various properties of an element. Some attributes are defined globally and can be used on any element, while others are defined for specific elements only. All attributes have a name and a value and look like as shown below in the example. Following is the example of an HTML5 attributes which illustrates how to mark up a div element with an attribute named class using a value of "example":
Attributes may only be specified within start tags and must never be used in end tags. HTML5 attributes are case insensitive and may be written in all uppercase or mixed case, although the most common convention is to stick with lowercase. Standard Attributes: The attributes listed below are supported by almost all the HTML 5 tags. Attribute Options Function accesskey User Defined Specifies a keyboard shortcut to access an element. align right, left, center Horizontally aligns tags background URL Places an background image behind an element bgcolor numeric, hexidecimal, RGB values Places a background color behind an element class User Defined Classifies an element for use with Cascading Style Sheets. contenteditable true, false 5|Page Specifies if the user can edit the element's content or not.