Support for HTML5 boolean attributes

I haven’t gone into this extensively, but you should at least consider adding autofocus to your list of boolean attributes. Thanks 😃

[mckamey]

If you prefer the list:

[ ] allowfullscreen
[ ] async
[ ] autofocus
[x] autoplay
[ ] checked
[ ] compact
[x] controls
[ ] declare
[ ] default
[x] defaultchecked
[x] defaultmuted
[x] defaultselected
[ ] defer
[ ] disabled
[x] draggable
[x] enabled
[ ] formnovalidate
[ ] hidden
[x] indeterminate
[ ] inert
[ ] ismap
[ ] itemscope
[x] loop
[ ] multiple
[ ] muted
[ ] nohref
[ ] noresize
[ ] noshade
[ ] novalidate
[ ] nowrap
[ ] open
[x] pauseonexit
[ ] readonly
[ ] required
[ ] reversed
[x] scoped
[ ] seamless
[ ] selected
[ ] sortable
[x] spellcheck
[x] translate
[ ] truespeed
[ ] typemustmatch
[x] visible

[mckamey]

I was searching for a similar list when I came upon this discussion. I thought you might benefit from an updated list. I started with @mathiasbynens’ idea to grep the spec but modified it to only look within the IDL blocks and look at the single-page spec. Then I stripped all the markup and removed every readonly attribute (since these can’t be set via markup). I sorted / deduped and this is what I am seeing. Note that it includes a few <video> and <audio> tag attributes which aren’t present in your list as of 10 months ago.

$ curl -s "http://www.w3.org/TR/html51/single-page.html" | grep "attribute boolean" > boolean.txt

allowFullscreen
async
autofocus
autoplay
checked
compact
controls
declare
default
defaultChecked
defaultMuted
defaultSelected
defer
disabled
draggable
enabled
formNoValidate
hidden
indeterminate
inert
isMap
itemScope
loop
multiple
muted
noHref
noResize
noShade
noValidate
noWrap
open
pauseOnExit
readOnly
required
reversed
scoped
seamless
selected
sortable
spellcheck
translate
trueSpeed
typeMustMatch
visible

You will probably want to lowercase these for your purposes. Thanks for the starter ideas.