CSS Positioning

CSS Positioning is a module of CSS that defines how to absolutely and relavitely position elements on the page.

Reference

CSS Properties

• bottom
• clear
• display
• float
• left
• position
• right
• top
• visibility
• z-index

Guides

Understanding CSS z-index

Presents the notion of stacking context and explain how z-ordering works, with several examples.

Specifications

Specification	Status	Comment
CSS Positioned Layout Module Level 3	Working Draft
CSS Level 2 (Revision 1)	Recommendation

Browser compatibility

• Desktop
• Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	1.0	1.0 (1.7 or earlier)	5.0	6.0	1.0 (85)

Feature	Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	1.0	1.0 (1)	(Yes)	(Yes)	(Yes)