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| async | |
| autocomplete | |
| autofocus | |
| autoplay | |
| border | |
| challenge | |
| checked | |
| compact | |
| contenteditable | |
| controls | |
| default | |
| defer | |
| disabled | |
| formNoValidate | |
| frameborder | |
| hidden | |
| indeterminate | |
| ismap | |
| loop | |
| multiple | |
| muted | |
| nohref | |
| noresize | |
| noshade | |
| novalidate | |
| nowrap | |
| open | |
| readonly | |
| required | |
| reversed | |
| scoped | |
| scrolling | |
| seamless | |
| selected | |
| sortable | |
| spellcheck | |
| translate |
here is the list created from the original list and applying the suggested changes from @bkdotcom
(I did not verify anything, just mechanically applied the changes):
async
autofocus
autoplay
checked
contenteditable
controls
default
defer
disabled
formNoValidate
frameborder
hidden
ismap
itemscope
loop
multiple
muted
nomodule
novalidate
open
readonly
required
reversed
scoped
selected
typemustmatch
From checking the living HTML spec, HTML currently has 25 Boolean attributes.
From the list above, contenteditable is not one of them (enumerated); frameborder, scoped, and typemustmatch are not part of the HTML standard.
From checking the living HTML spec
where did you find a list?
or did you have to scan the documentation for each tag?
https://html.spec.whatwg.org/multipage/semantics.html#semantics
edit:
answering my own question:
https://html.spec.whatwg.org/#attributes-3
@bkdotcom, I’ve been preparing an overview for Boolean attributes, too, and had for that gone through https://html.spec.whatwg.org/, at some point looking for is a boolean. That search seems to lead to all attributes.
PS.
Aforementioned overview is now available at The 25 Boolean Attributes of HTML.
not an attribute:
not boolean
<keygen name="name" challenge="challenge string" keytype="type" keyparams="pqg-params">(also,keygenis deprecated)missing from list:
obsolete / deprecated / never-was