While making this website, I realized the majority of commonly used tags are available in HTML 4.01. I'm not currently planning to support earlier versions, as both HTML4 and CSS2.1 seem restrictive, but I was curious how the set of supported elements changed over time. The following table shows various tags found in specifications.
I'll be happy to fix any mistakes, just let me know!
| Element | HTML 1.0 | HTML 2.0 | HTML 3.2 | HTML 4.01 | HTML5 |
|---|---|---|---|---|---|
| A | Yes | Yes | Yes | Yes | Yes |
| ABBR | Yes | Yes | |||
| ACRONYM | Yes | Obsolete | |||
| ADDRESS | Yes | Yes | Yes | Yes | |
| APPLET | Yes | Obsolete | Obsolete | ||
| AREA | Yes | Yes | |||
| ARTICLE | Yes | ||||
| ASIDE | Yes | ||||
| AUDIO | Yes | ||||
| B | Yes | Yes | Yes | Yes | |
| BASE | Yes | Yes | Yes | Yes | |
| BASEFONT | Yes | Obsolete | Obsolete | ||
| BDI | Yes | ||||
| BDO | Yes | Yes | |||
| BIG | Yes | Yes | Obsolete | ||
| BLOCKQUOTE | Yes | Yes | Yes | Yes | |
| BODY | Yes | Yes | Yes | Yes | |
| BR | Yes | Yes | Yes | Yes | |
| BUTTON | Yes | ||||
| CANVAS | Yes | ||||
| CAPTION | Yes | Yes | Yes | ||
| CENTER | Yes | Obsolete | Obsolete | ||
| CITE | Yes | Yes | Yes | Yes | |
| CODE | Yes | Yes | Yes | Yes | |
| COL | Yes | Yes | |||
| COLGROUP | Yes | Yes | |||
| DATA | Yes | ||||
| DATALIST | Yes | ||||
| DD | Yes | Yes | Yes | Yes | |
| DEL | Yes | Yes | |||
| DETAILS | Yes | ||||
| DFN | Yes | Yes | Yes | ||
| DIALOG | Yes | ||||
| DIR | Yes | Yes | Yes | Obsolete | Obsolete |
| DIV | Yes | Yes | Yes | ||
| DL | Yes | Yes | Yes | Yes | |
| DT | Yes | Yes | Yes | Yes | |
| EM | Yes | Yes | Yes | Yes | |
| EMBED | Yes | ||||
| FIELDSET | Yes | Yes | |||
| FIGCAPTION | Yes | ||||
| FIGURE | Yes | ||||
| FONT | Yes | Obsolete | Obsolete | ||
| FOOTER | Yes | ||||
| FORM | Yes | Yes | Yes | Yes | |
| FRAME | Yes | Obsolete | |||
| FRAMESET | Yes | Obsolete | |||
| H1-H6 | Yes | Yes | Yes | Yes | Yes |
| HEAD | Yes | Yes | Yes | Yes | |
| HEADER | Yes | ||||
| HGROUP | Yes | ||||
| HP1... | Unused | ||||
| HR | Yes | Yes | Yes | Yes | |
| HTML | Yes | Yes | Yes | Yes | |
| I | Yes | Yes | Yes | Yes | |
| IFRAME | Yes | Yes | |||
| IMG | Yes | Yes | Yes | Yes | |
| INPUT | Yes | Yes | Yes | Yes | |
| INS | Yes | Yes | |||
| ISINDEX | Yes | Yes | Yes | Obsolete | |
| KBD | Yes | Yes | Yes | Yes | |
| KEYGEN | Yes | ||||
| LABEL | Yes | Yes | |||
| LEGEND | Yes | Yes | |||
| LI | Yes | Yes | Yes | Yes | Yes |
| LINK | Yes | Yes | Yes | Yes | |
| LISTING | Yes | Yes | Obsolete | ||
| MAIN | Yes | ||||
| MAP | Yes | Yes | Yes | ||
| MARK | Yes | ||||
| MENU | Yes | Yes | Yes | Obsolete | Yes |
| MENUITEM | Yes | ||||
| META | Yes | Yes | Yes | Yes | |
| METER | Yes | ||||
| NAV | Yes | ||||
| NEXTID | Obsolete | Obsolete | |||
| NOFRAMES | Yes | Obsolete | |||
| NOSCRIPT | Yes | Yes | |||
| OBJECT | Yes | Yes | |||
| OL | Yes | Yes | Yes | ||
| OPTGROUP | Yes | Yes | |||
| OPTION | Yes | Yes | Yes | Yes | |
| OUTPUT | Yes | ||||
| P | Yes | Yes | Yes | Yes | |
| PARAM | Yes | Yes | |||
| PICTURE | Yes | ||||
| PLAINTEXT | Yes | Obsolete | |||
| PRE | Yes | Yes | Yes | Yes | |
| PROGRESS | Yes | ||||
| Q | Yes | Yes | |||
| RP | Yes | ||||
| RT | Yes | ||||
| RUBY | Yes | ||||
| S | Obsolete | Yes | |||
| SAMP | Yes | Yes | Yes | Yes | |
| SCRIPT | Yes | Yes | Yes | ||
| SEARCH | Yes | ||||
| SECTION | Yes | ||||
| SELECT | Yes | Yes | Yes | Yes | |
| SLOT | Yes | ||||
| SMALL | Yes | Yes | Yes | ||
| SOURCE | Yes | ||||
| SPAN | Yes | Yes | |||
| STRIKE | Yes | Obsolete | Obsolete | ||
| STRONG | Yes | Yes | Yes | Yes | |
| STYLE | Yes | Yes | Yes | ||
| SUB | Yes | Yes | Yes | ||
| SUMMARY | Yes | ||||
| SUP | Yes | Yes | Yes | ||
| SVG | Yes | ||||
| TABLE | Yes | Yes | Yes | ||
| TBODY | Yes | Yes | |||
| TD | Yes | Yes | Yes | ||
| TEMPLATE | Yes | ||||
| TEXTAREA | Yes | Yes | Yes | Yes | |
| TFOOT | Yes | Yes | |||
| TH | Yes | Yes | |||
| THEAD | Yes | Yes | |||
| TIME | Yes | ||||
| TITLE | Yes | Yes | Yes | Yes | Yes |
| TR | Yes | Yes | Yes | ||
| TRACK | Yes | ||||
| TT | Yes | Yes | Yes | Obsolete | |
| U | Yes | Obsolete | Yes | ||
| UL | Yes | Yes | Yes | Yes | Yes |
| VAR | Yes | Yes | Yes | Yes | |
| VIDEO | Yes | ||||
| WBR | Yes | ||||
| XMP | Yes | Yes | Obsolete |