First Category: Expressive elements
- Basefont
- Big
- Center
- Font
- S
- Strike
- Tt
- U
Suggest the correct elements to replace them, and use CSS to ensure the effect after rendering
Class II: Framework class elements
but HTML5 supports IFRAME.
Class III: Attribute Classes
Many of the performance attributes are also removed by the new specification as follows:
- Align
- Link, Vlink, ALink, Text Properties on the Body tab
- BgColor
- Height and width
- The scrolling property on the IFRAME element
- valign
- Hspace and Vspace
- CellPadding, cellspacing, and Border properties on the table label
- The profile property on the header label
- The target property on link label A
- LONGDESC Properties for IMG and IFRAME elements
Class Fourth: Other
- ABBR replace acronym (used to denote abbreviations)
- Object replaces the Applet
- UL replaced the Dir
HTML 5 deprecated tags and attributes
