What elements are not supported by html5?

html5 Unsupported elements: 1. basefont; 2. big; 3. center; 4. font; 5. s; 6. strike; 7. tt; 8. u; 9. frame; 10. noframes; 11, frameset; 12, bgsound; 13, blink, etc.

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

What are the elements that are not supported by html5

1. Tag elements that can be replaced by css

Delete purely expressive elements such as basefont, big, center, font, s, strike, tt, and u. In HTML5, it is advocated to put the screen display function in CSS for unified editing. .

2. html5 no longer uses frame

Frame, noframes and frameset are no longer used. These tags have a negative impact on usability. HTML5 does not support frame frames, but only supports iframe frames, or use a server-side format composed of multiple pages that conforms to the page, and delete the above three tags.

3. Only tag elements supported by certain browsers

bgsound background music, blink text flashing, marquee text scrolling, applet

4. Other uncommon tag elements

• ##ul replaces dir

##pre replaces listing
code replaces xmp
ruby replaces rb
abbr replaces acronym
Abolition isindex is replaced by a combination of form and input.
Abolish listing and use pre instead
Abolish nextid and use guids
Abolish plaintex and use "text /plian" (unformatted text) MIME type alternative.

Supplement: Redefined html tag element: represents inline text, usually In bold, no important meaning is conveyed.