CSS3/FixedPosition

Mobile and Tablets

• Mobile effectively has two viewports: what content layout sees and what the user sees.
• What behavior do we want to support for position: fixed on mobile devices and tablet devices? Goals:
  • Backward compatible with desktop (i.e., leaves most pages usable that weren't designed with zooming in mind)
  • ...
• Links
  • http://www.quirksmode.org/blog/archives/2010/12/the_fifth_posit.html

Patterns like fixed position

• An element that remains in place until it is about to be displaced off the page, and then is fixed position.
  • Example: "show page contents" on http://www.quirksmode.org/blog/archives/2010/12/the_fifth_posit.html
  • Example: Fennec's URL bar when the page is loading