The difference between HTML and XHTML

The improvement of XHTML1.0 to HTML4.0

(1) The syntax is more rigorous, drawing on the wording of XML

(2) separate the content and style of the page: discard the tags and attributes of the presentation style in HTML4, and recommend using CSS to describe the style of the page

Strict edition (Strict): (1) Disable style-related tags and attributes using strict XML syntax (2)

Transition version (Transitional): (1) Use strict XML syntax (2) to allow deprecated style-related tags and attributes

HTML4.0 in order to enrich the display, the design of a lot of tags and properties of the page "content" and "performance" mixed together: resulting in a messy page content, not easy to understand and modify.

The difference between HTML and XHTML