dataset & data-* attributes
Method of applying and accessing custom data to elements.
Attributes for form submission
Attributes for form submission that may be specified on submit buttons. The attributes are: `formaction`, `formenctype`, `formmethod`, `formnovalidate`, and `formtarget`
Srcset and sizes attributes
The `srcset` and `sizes` attributes on `img` (or `source`) elements allow authors to define various image resources and "hints" that assist a user agent to determine the most appropriate image source to display (e.g. high-resolution displays, small monitors, etc).
element api: attributes
element api: gethtml: serializes `<` and `>` in attributes as `<` and `>` (see this spec issue)
element api: innerhtml: serializes `<` and `>` in attributes as `<` and `>` (see this spec issue)
element api: outerhtml: serializes `<` and `>` in attributes as `<` and `>` (see this spec issue)
htmlelement api: attributestylemap
mathmlelement api: attributestylemap
shadowroot api: gethtml: serializes `<` and `>` in attributes as `<` and `>` (see this spec issue)
shadowroot api: innerhtml: serializes `<` and `>` in attributes as `<` and `>` (see this spec issue)
svgelement api: attributestylemap
html element: img: aspect ratio computed from `width` and `height` attributes
html element: video: aspect ratio computed from `width` and `height` attributes
html attribute: `data-*` attributes
javascript statement: import: import attributes with `assert` syntax (formerly import assertions)
javascript statement: import: import attributes with `assert` syntax (formerly import assertions): `assert {type: 'css'}`
javascript statement: import: import attributes with `assert` syntax (formerly import assertions): `assert {type: 'json'}`
javascript statement: import: import attributes (`with` syntax)
javascript statement: import: import attributes (`with` syntax): `with {type: 'css'}`
javascript statement: import: import attributes (`with` syntax): `with {type: 'json'}`
javascript statement: import: import attributes (`with` syntax): `with {type: 'text'}`
global_attributes: autofocus
global_attributes: class
global_attributes: clip
global_attributes: clip-path
global_attributes: clip-rule
global_attributes: color
global_attributes: cursor
global_attributes: direction
global_attributes: display
global_attributes: fill-rule
global_attributes: filter
global_attributes: font-size
global_attributes: font-style
global_attributes: id
global_attributes: lang
global_attributes: mask
global_attributes: opacity
global_attributes: overflow
global_attributes: stroke
global_attributes: style
global_attributes: tabindex
global_attributes: transform
global_attributes: xml:lang
global_attributes: xml:space
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