Reference01
Complete HTML attribute applicability index
Find current HTML attributes, their permitted host elements, and exact specification definitions, with guidance on states and browser support.
THE HTML LEARNING LIBRARY
HTML reference
Find the syntax, attributes, constraints, and accessibility details you need.
56 resources to explore
24 on this page
Reference02
Document roots: html, head, and body
The html element is the root of an HTML document.
Reference03
Quotation elements: blockquote, q, and cite
Blockquote identifies a passage quoted from another source, usually as a separate block.
Reference04
Responsive images: img, picture, and source
Img embeds an image with a text alternative.
Reference05
The form element: successful controls and submission
Form groups controls for submitting a set of named values.
Reference06
Table elements and header relationships
A table expresses relationships across rows and columns.
Reference07
Identity and application data: id, class, and data-*
Id gives an element a unique identifier in its tree.
Reference08
Inline presentation and policy: style, title, and nonce
Style attaches CSS declarations to an element.
Reference09
ARIA attributes: names, relationships, states, and announcements
ARIA adds accessibility semantics when native HTML alone does not express the necessary relationship or state.
Reference10
Page metadata: title and meta
The title element names the document, while meta supplies metadata that does not fit another dedicated metadata element.
Reference11
Meaningful text: em, strong, b, i, small, mark, s, and u
These elements distinguish different kinds of meaning inside prose.
Reference12
Image maps: map and area
Map defines named regions of an image, and area describes each region's shape and destination.
Reference13
Form relationships: label, fieldset, and legend
Label gives a control an accessible name and usually expands its clickable area.
Reference14
Disclosures: details and summary
Details provides a native disclosure that shows or hides supporting content.
Reference15
Language and translation: lang, dir, and translate
Lang identifies the language of content using a language tag.
Reference16
Microdata: itemscope, itemtype, itemprop, itemid, and itemref
Microdata annotates visible HTML with machine-readable items and properties.
Reference17
Experimental implementation: headingoffset and headingreset
Headingoffset and headingreset address computed heading levels, particularly in reusable component structures.
Reference18
Document resources: link, style, and base
Link connects a document to another resource or describes a relationship; style contains an embedded stylesheet; base changes how relative URLs are resolved.
Reference19
Abbreviations and definitions: abbr and dfn
Abbr marks an abbreviation or acronym.
Reference20
Timed media: audio, video, source, and track
Audio and video embed timed media.
Reference21
The input element and its control types
Input is a void element whose type selects a control state.
Reference22
The dialog element: modal and nonmodal interactions
Dialog represents a dialog box or similar interactive subwindow.
Reference23
Visibility and interaction: hidden and inert
Compare hidden and inert, including presentation, focus, and accessibility implications. Learn when each state fits an interface.
Reference24
Component attributes: slot, part, exportparts, and is
Slot assigns a light-DOM element to a named distribution point inside a shadow tree.
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