Supported HTML

lui supports 96 HTML tags with typed element structs. Unknown tags are silently dropped (subtree discarded).

Fully Supported

Element	Notes
html, body	Document root; body also used as synthetic wrapper for multi-root docs
div, span	Generic block/inline containers
p	Paragraph with auto-close handling
h1–h6	Headings with UA font-size/weight/margin
pre	Preformatted text, monospace
blockquote, address	Block content with UA styles
hr	Horizontal rule, void element
br	Forced line break, void element
wbr	Word-break opportunity
header, nav, main, section, article, aside, footer	Sectioning content
a	Inline anchor, focusable with href
strong, b	Bold via CSS
em, i	Italic via CSS
u, ins, s, del	Underline/strikethrough via CSS
small, mark	Smaller text / highlight
code, kbd, samp	Monospace
cite, dfn, var	Italic phrasing
abbr	Abbreviation with dotted underline
sub, sup	Subscript/superscript
time, data	Phrasing with datetime/value
bdi, bdo	Bidi isolation/override
ul, ol, li	Lists with basic marker support
dl, dt, dd	Description lists
label	Form label
style	Inline stylesheet (collected by cascade)
template	Inert content container

Partially Supported

Element	What Works	Gaps
img	Loads/renders from src, srcset; uses intrinsic dimensions	Image maps, full <picture> source selection
table	Full table layout: table/table-row-group/table-row/table-cell/table-caption display, colspan/rowspan, column distribution, border-spacing	Border-collapse limited
tr, td, th	Table row/cell layout, colspan/rowspan	—
thead, tbody, tfoot	table-header-group/row-group/footer-group	—
colgroup, col	Parsed with span	Column styling not propagated
input	See Forms and Inputs for type breakdown	Varies by type
textarea	Multiline editing, placeholder, resize, form data collection	—
button	Focusable, styled as button, submit triggers form submission	—
select, option	Parsed, styled	No popup list
form	Parsed with attributes	No submission/validation
fieldset, legend	Block layout, border	Limited native behavior
details, summary	Parsed	No toggle behavior
dialog	Parsed with open	No modal/top-layer
video, audio	Parsed with media attributes	No playback
svg	Rasterized as replaced element	Limited nested SVG
ruby, rt, rp	Ruby display	Limited layout
canvas, meter, progress	Parsed	No native rendering

Input Type Support

Type	Level	Notes
text, password	Full	Editing, placeholder, caret, selection, masking
checkbox, radio	Full	Click toggle, native paint (checkmark/dot), accent-color
range	Full	Track+thumb, min/max/step, drag adjust
color	Full	Swatch + full color picker overlay
date, datetime-local	Full	Segmented editing, locale formatting, calendar picker
file	Full	Native file dialog (rfd), filenames display
submit, reset, button	Full	Button styling, static
hidden	Full	display: none
email, number, search, tel, url	Partial	Like text, no validation
time, week, month	Partial	Like text, no picker
image	Partial	Like text, no image submit

Parsed Only (no runtime behavior)

head, title, meta, link, script (JS out of scope), slot, track, source, noscript, datalist, output

Not Supported (dropped)

figure, figcaption, hgroup, menu, search, q, area, base, embed, map, object, math