HTML Standard

HTML Standard
Index
Elements
Element content categories
Attributes
Element interfaces
All interfaces
Events
HTTP headers
MIME types
Index
The following sections only cover conforming elements and features.
Elements
This section is non-normative.
List of elements
Element
Description
Categories
Parents†
Children
Attributes
Interface
Hyperlink
flow
phrasing
*;
interactive
palpable
phrasing
transparent
globals
href
target
ping
rel
hreflang
type
referrerpolicy
HTMLAnchorElement
abbr
Abbreviation
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
address
Contact information for a page or
article
element
flow
palpable
flow
flow
globals
HTMLElement
area
Hyperlink or dead area on an image map
flow
phrasing
phrasing
empty
globals
alt
coords
shape
href
target
ping
rel
referrerpolicy
HTMLAreaElement
article
Self-contained syndicatable or reusable composition
flow
sectioning
palpable
flow
flow
globals
HTMLElement
aside
Sidebar for tangentially related content
flow
sectioning
palpable
flow
flow
globals
HTMLElement
audio
Audio player
flow
phrasing
embedded
interactive
palpable
phrasing
source
*;
track
*;
transparent
globals
src
crossorigin
preload
autoplay
loading
loop
muted
controls
HTMLAudioElement
Keywords
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
base
Base URL and default target
navigable
for
hyperlinks
and
forms
metadata
head
empty
globals
href
target
HTMLBaseElement
bdi
Text directionality isolation
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
bdo
Text directionality formatting
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
blockquote
A section quoted from another source
flow
palpable
flow
flow
globals
cite
HTMLQuoteElement
body
Document body
none
html
flow
globals
onafterprint
onbeforeprint
onbeforeunload
onhashchange
onlanguagechange
onmessage
onmessageerror
onoffline
ononline
onpageswap
onpagehide
onpagereveal
onpageshow
onpopstate
onrejectionhandled
onstorage
onunhandledrejection
onunload
HTMLBodyElement
br
Line break, e.g. in poem or postal address
flow
phrasing
phrasing
empty
globals
HTMLBRElement
button
Button control
flow
phrasing
interactive
listed
labelable
submittable
form-associated
palpable
phrasing
phrasing
globals
command
commandfor
disabled
form
formaction
formenctype
formmethod
formnovalidate
formtarget
name
popovertarget
popovertargetaction
type
value
HTMLButtonElement
canvas
Scriptable bitmap canvas
flow
phrasing
embedded
palpable
phrasing
transparent
globals
width
height
HTMLCanvasElement
caption
Table caption
none
table
flow
globals
HTMLTableCaptionElement
cite
Title of a work
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
code
Computer code
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
col
Table column
none
colgroup
empty
globals
span
HTMLTableColElement
colgroup
Group of columns in a table
none
table
col
*;
template
globals
span
HTMLTableColElement
data
Machine-readable equivalent
flow
phrasing
palpable
phrasing
phrasing
globals
value
HTMLDataElement
datalist
Container for options for
combo box control
flow
phrasing
phrasing
phrasing
*;
option
*;
script-supporting elements
globals
HTMLDataListElement
dd
Content for corresponding
dt
element(s)
none
dl
div
flow
globals
HTMLElement
del
A removal from the document
flow
phrasing
*;
palpable
phrasing
transparent
globals
cite
datetime
HTMLModElement
details
Disclosure control for hiding details
flow
interactive
palpable
flow
summary
*;
flow
globals
name
open
HTMLDetailsElement
dfn
Defining instance
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
dialog
Dialog box or window
flow
flow
flow
globals
open
HTMLDialogElement
div
Generic flow container, or container for name-value groups in
dl
elements
flow
palpable
select
element inner content elements
optgroup
element inner content elements
option
element inner content elements
flow
dl
select
element inner content elements
optgroup
element inner content elements
option
element inner content elements
flow
select
element inner content elements
*;
optgroup
element inner content elements
*;
option
element inner content elements
globals
HTMLDivElement
dl
Association list consisting of zero or more name-value groups
flow
palpable
flow
dt
*;
dd
*;
div
*;
script-supporting elements
globals
HTMLDListElement
dt
Legend for corresponding
dd
element(s)
none
dl
div
flow
globals
HTMLElement
em
Stress emphasis
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
embed
Plugin
flow
phrasing
embedded
interactive
palpable
phrasing
empty
globals
src
type
width
height
any*
HTMLEmbedElement
fieldset
Group of form controls
flow
listed
form-associated
palpable
flow
legend
*;
flow
globals
disabled
form
name
HTMLFieldSetElement
figcaption
Caption for
figure
none
figure
flow
globals
HTMLElement
figure
Figure with optional caption
flow
palpable
flow
figcaption
*;
flow
globals
HTMLElement
footer
Footer for a page or section
flow
palpable
flow
flow
globals
HTMLElement
form
User-submittable form
flow
palpable
flow
flow
globals
accept-charset
action
autocomplete
enctype
method
name
novalidate
rel
target
HTMLFormElement
h1
h2
h3
h4
h5
h6
Heading
flow
heading
palpable
legend
summary
flow
phrasing
globals
HTMLHeadingElement
head
Container for document metadata
none
html
metadata content
globals
HTMLHeadElement
header
Introductory or navigational aids for a page or section
flow
palpable
flow
flow
globals
HTMLElement
hgroup
Heading container
flow
palpable
legend
summary
flow
h1
h2
h3
h4
h5
h6
script-supporting elements
globals
HTMLElement
hr
Thematic break
flow
select
element inner content elements
flow
select
element inner content elements
empty
globals
HTMLHRElement
html
Root element
none
none*
head
*;
body
globals
HTMLHtmlElement
Alternate voice
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
iframe
Child navigable
flow
phrasing
embedded
interactive
palpable
phrasing
empty
globals
src
srcdoc
name
sandbox
allow
allowfullscreen
width
height
referrerpolicy
loading
HTMLIFrameElement
img
Image
flow
phrasing
embedded
interactive
*;
form-associated
palpable
phrasing
picture
empty
globals
alt
src
srcset
sizes
crossorigin
usemap
ismap
controls
width
height
referrerpolicy
decoding
loading
fetchpriority
HTMLImageElement
input
Form control
flow
phrasing
interactive
*;
listed
labelable
submittable
resettable
form-associated
palpable
phrasing
empty
globals
accept
alpha
alt
autocomplete
checked
colorspace
dirname
disabled
form
formaction
formenctype
formmethod
formnovalidate
formtarget
height
list
max
maxlength
min
minlength
multiple
name
pattern
placeholder
popovertarget
popovertargetaction
readonly
required
size
src
step
type
value
width
HTMLInputElement
ins
An addition to the document
flow
phrasing
*;
palpable
phrasing
transparent
globals
cite
datetime
HTMLModElement
kbd
User input
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
label
Caption for a form control
flow
phrasing
interactive
palpable
phrasing
phrasing
globals
for
HTMLLabelElement
legend
Caption for
fieldset
none
fieldset
optgroup
phrasing
*;
heading content
globals
HTMLLegendElement
li
List item
none
ol
ul
flow
globals
value
HTMLLIElement
link
Link metadata
metadata
flow
*;
phrasing
head
noscript
*;
phrasing
empty
globals
href
crossorigin
rel
as
media
hreflang
type
sizes
imagesrcset
imagesizes
referrerpolicy
integrity
blocking
color
disabled
fetchpriority
HTMLLinkElement
main
Container for the dominant contents of the document
flow
palpable
flow
flow
globals
HTMLElement
map
Image map
flow
phrasing
*;
palpable
phrasing
transparent
area
globals
name
HTMLMapElement
mark
Highlight
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
MathML
math
MathML root
flow
phrasing
embedded
palpable
phrasing
per
[MATHML]
per
[MATHML]
Element
Menu of commands
flow
palpable
flow
li
script-supporting elements
globals
HTMLMenuElement
meta
Text metadata
metadata
flow
*;
phrasing
head
noscript
*;
phrasing
empty
globals
name
http-equiv
content
charset
media
HTMLMetaElement
meter
Gauge
flow
phrasing
labelable
palpable
phrasing
phrasing
globals
value
min
max
low
high
optimum
HTMLMeterElement
nav
Section with navigational links
flow
sectioning
palpable
flow
flow
globals
HTMLElement
noscript
Fallback content for script
metadata
flow
phrasing
select
element inner content elements
optgroup
element inner content elements
head
*;
phrasing
varies*
globals
HTMLElement
object
Image,
child navigable
, or
plugin
flow
phrasing
embedded
interactive
*;
listed
form-associated
palpable
phrasing
transparent
globals
data
type
name
form
width
height
HTMLObjectElement
ol
Ordered list
flow
palpable
flow
li
script-supporting elements
globals
reversed
start
type
HTMLOListElement
optgroup
Group of options in a list box
select
element inner content elements
select
div
optgroup
element inner content elements
legend
globals
disabled
label
HTMLOptGroupElement
option
Option in a list box or combo box control
select
element inner content elements
optgroup
element inner content elements
select
datalist
optgroup
div
text
*;
option
element inner content elements
globals
disabled
label
selected
value
HTMLOptionElement
output
Calculated output value
flow
phrasing
listed
labelable
resettable
form-associated
palpable
phrasing
phrasing
globals
for
form
name
HTMLOutputElement
Paragraph
flow
palpable
flow
phrasing
globals
HTMLParagraphElement
picture
Image
flow
phrasing
embedded
palpable
phrasing
source
*;
one
img
script-supporting elements
globals
HTMLPictureElement
pre
Block of preformatted text
flow
palpable
flow
phrasing
globals
HTMLPreElement
progress
Progress bar
flow
phrasing
labelable
palpable
phrasing
phrasing
globals
value
max
HTMLProgressElement
Quotation
flow
phrasing
palpable
phrasing
phrasing
globals
cite
HTMLQuoteElement
rp
Parenthesis for ruby annotation text
none
ruby
text
globals
HTMLElement
rt
Ruby annotation text
none
ruby
phrasing
globals
HTMLElement
ruby
Ruby annotation(s)
flow
phrasing
palpable
phrasing
phrasing
rt
rp
globals
HTMLElement
Inaccurate text
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
samp
Computer output
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
script
Embedded script
metadata
flow
phrasing
script-supporting
head
phrasing
script-supporting
script, data, or script documentation*
globals
src
type
nomodule
async
defer
crossorigin
integrity
referrerpolicy
blocking
fetchpriority
HTMLScriptElement
Container for search controls
flow
palpable
flow
flow
globals
HTMLElement
section
Generic document or application section
flow
sectioning
palpable
flow
flow
globals
HTMLElement
select
List box control
flow
phrasing
interactive
listed
labelable
submittable
resettable
form-associated
palpable
phrasing
select
element inner content elements
button
globals
autocomplete
disabled
form
multiple
name
required
size
HTMLSelectElement
selectedcontent
Mirrors content from an
option
none
button
empty
globals
HTMLSelectedContentElement
slot
Shadow tree slot
flow
phrasing
phrasing
transparent
globals
name
HTMLSlotElement
small
Side comment
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
source
Image source for
img
or media source for
video
or
audio
none
picture
video
audio
empty
globals
type
media
src
srcset
sizes
width
height
HTMLSourceElement
span
Generic phrasing container
flow
phrasing
palpable
phrasing
option
element inner content elements
phrasing
globals
HTMLSpanElement
strong
Importance
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
style
Embedded styling information
metadata
head
noscript
text*
globals
media
blocking
HTMLStyleElement
sub
Subscript
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
summary
Caption for
details
none
details
phrasing
heading content
globals
HTMLElement
sup
Superscript
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
SVG
svg
SVG root
flow
phrasing
embedded
palpable
phrasing
per
[SVG]
per
[SVG]
SVGSVGElement
table
Table
flow
palpable
flow
caption
*;
colgroup
*;
thead
*;
tbody
*;
tfoot
*;
tr
*;
script-supporting elements
globals
HTMLTableElement
tbody
Group of rows in a table
none
table
tr
script-supporting elements
globals
HTMLTableSectionElement
td
Table cell
none
tr
flow
globals
colspan
rowspan
headers
HTMLTableCellElement
template
Template
metadata
flow
phrasing
script-supporting
metadata
phrasing
script-supporting
colgroup
empty
globals
shadowrootmode
shadowrootdelegatesfocus
shadowrootslotassignment
shadowrootclonable
shadowrootserializable
shadowrootcustomelementregistry
HTMLTemplateElement
textarea
Multiline text controls
flow
phrasing
interactive
listed
labelable
submittable
resettable
form-associated
palpable
phrasing
text
globals
autocomplete
cols
dirname
disabled
form
maxlength
minlength
name
placeholder
readonly
required
rows
wrap
HTMLTextAreaElement
tfoot
Group of footer rows in a table
none
table
tr
script-supporting elements
globals
HTMLTableSectionElement
th
Table header cell
interactive
tr
flow
globals
colspan
rowspan
headers
scope
abbr
HTMLTableCellElement
thead
Group of heading rows in a table
none
table
tr
script-supporting elements
globals
HTMLTableSectionElement
time
Machine-readable equivalent of date- or time-related data
flow
phrasing
palpable
phrasing
phrasing
globals
datetime
HTMLTimeElement
title
Document title
metadata
head
text
globals
HTMLTitleElement
tr
Table row
none
table
thead
tbody
tfoot
th
*;
td
script-supporting elements
globals
HTMLTableRowElement
track
Timed text track
none
audio
video
empty
globals
default
kind
label
src
srclang
HTMLTrackElement
Unarticulated annotation
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
ul
List
flow
palpable
flow
li
script-supporting elements
globals
HTMLUListElement
var
Variable
flow
phrasing
palpable
phrasing
phrasing
globals
HTMLElement
video
Video player
flow
phrasing
embedded
interactive
palpable
phrasing
source
*;
track
*;
transparent
globals
src
crossorigin
poster
preload
autoplay
playsinline
loading
loop
muted
controls
width
height
HTMLVideoElement
wbr
Line breaking opportunity
flow
phrasing
phrasing
empty
globals
HTMLElement
autonomous custom elements
Author-defined elements
flow
phrasing
palpable
flow
phrasing
transparent
globals
; any, as decided by the element's author
Supplied by the element's author (inherits from
HTMLElement
An asterisk (*) in a cell indicates that the actual rules are more
complicated than indicated in the table above.
† Categories in the "Parents" column refer to parents that list
the given categories in their content model, not to elements that themselves are in those
categories. For example, the
element's "Parents" column says "phrasing", so any
element whose content model contains the "phrasing" category could be a parent of an
element. Since the "flow" category includes all the "phrasing" elements, that means
the
th
element could be a parent to an
element.
Element content categories
This section is non-normative.
List of element content categories
Category
Elements
Elements with exceptions
Metadata content
base
link
meta
noscript
script
style
template
title
Flow content
abbr
address
article
aside
audio
bdi
bdo
blockquote
br
button
canvas
cite
code
data
datalist
del
details
dfn
dialog
div
dl
em
embed
fieldset
figure
footer
form
h1
h2
h3
h4
h5
h6
header
hgroup
hr
iframe
img
input
ins
kbd
label
map
mark
MathML
math
meter
nav
noscript
object
ol
output
picture
pre
progress
ruby
samp
script
section
select
slot
small
span
strong
sub
sup
SVG
svg
table
template
textarea
time
ul
var
video
wbr
autonomous custom elements
Text
area
(if it is a descendant of a
map
element);
link
(if it is
allowed in the body
);
main
(if it is a
hierarchically correct
main
element
);
meta
(if the
itemprop
attribute is present)
Sectioning content
article
aside
nav
section
Heading content
h1
h2
h3
h4
h5
h6
hgroup
Phrasing content
abbr
audio
bdi
bdo
br
button
canvas
cite
code
data
datalist
del
dfn
em
embed
iframe
img
input
ins
kbd
label
map
mark
MathML
math
meter
noscript
object
output
picture
progress
ruby
samp
script
select
selectedcontent
slot
small
span
strong
sub
sup
SVG
svg
template
textarea
time
var
video
wbr
autonomous custom elements
Text
area
(if it is a descendant of a
map
element);
link
(if it is
allowed in the body
);
meta
(if the
itemprop
attribute is present)
Embedded content
audio
canvas
embed
iframe
img
MathML
math
object
picture
SVG
svg
video
Interactive content
button
details
embed
iframe
label
select
textarea
(if the
href
attribute is present);
audio
(if the
controls
attribute is present);
img
(if the
usemap
or
controls
attribute is present);
input
(if the
type
attribute is
not
in the
Hidden
state);
video
(if the
controls
attribute is present)
Form-associated elements
button
fieldset
input
label
object
output
select
textarea
img
form-associated custom elements
Listed elements
button
fieldset
input
object
output
select
textarea
form-associated custom elements
Submittable elements
button
input
select
textarea
form-associated custom elements
Resettable elements
input
output
select
textarea
form-associated custom elements
Autocapitalize-and-autocorrect
inheriting elements
button
fieldset
input
output
select
textarea
Labelable elements
button
input
meter
output
progress
select
textarea
form-associated custom elements
Palpable content
abbr
address
article
aside
bdi
bdo
blockquote
button
canvas
cite
code
data
del
details
dfn
div
em
embed
fieldset
figure
footer
form
h1
h2
h3
h4
h5
h6
header
hgroup
iframe
img
ins
kbd
label
main
map
mark
MathML
math
meter
nav
object
output
picture
pre
progress
ruby
samp
section
select
small
span
strong
sub
sup
SVG
svg
table
textarea
time
var
video
autonomous custom elements
audio
(if the
controls
attribute is present);
dl
(if the element's children include at least one name-value group);
input
(if the
type
attribute is
not
in the
Hidden
state);
(if the element's children include at least one
li
element);
ol
(if the element's children include at least one
li
element);
ul
(if the element's children include at least one
li
element);
Text
that is not
inter-element whitespace
Script-supporting elements
script
template
select
element inner content elements
option
optgroup
hr
script-supporting elements
noscript
div
optgroup
element inner content elements
option
script-supporting elements
noscript
div
option
element inner content elements
div
phrasing content
except for
datalist
object
interactive content
, or elements with
tabindex
Attributes
This section is non-normative.
List of attributes (excluding event handler content attributes)
Attribute
Element(s)
Description
Value
abbr
th
Alternative label to use for the header cell when referencing the cell in other contexts
Text
accept
input
Hint for expected file type in
file upload controls
Set of comma-separated tokens
* consisting of
valid MIME type strings with no parameters
or
audio/*
video/*
, or
image/*
accept-charset
form
Character encodings to use for
form submission
ASCII case-insensitive
match for "
UTF-8
accesskey
HTML elements
Keyboard shortcut to activate or focus element
Ordered set of unique space-separated tokens
, none of which are
identical to
another, each consisting of one code point in length
action
form
URL
to use for
form submission
Valid non-empty URL potentially surrounded by spaces
allow
iframe
Permissions policy
to be applied to the
iframe
's contents
Serialized permissions policy
allowfullscreen
iframe
Whether to allow the
iframe
's contents to use
requestFullscreen()
Boolean attribute
alpha
input
Allow the color's alpha component to be set
Boolean attribute
alt
area
img
input
Replacement text for use when images are not available
Text
as
link
Destination for a preload request (for
rel
="
preload
" and
rel
="
modulepreload
")
Preload destination
, for
rel
="
preload
";
module preload destination
, for
rel
="
modulepreload
async
script
Execute script when available, without blocking while fetching
Boolean attribute
autocapitalize
HTML elements
Recommended autocapitalization behavior (for supported input methods)
on
";
off
";
none
";
sentences
";
words
";
characters
autocomplete
form
Default setting for autofill feature for controls in the form
on
"; "
off
autocomplete
input
select
textarea
Hint for form autofill feature
Autofill field
name and related tokens*
autocorrect
HTML elements
Recommended autocorrection behavior (for supported input methods)
on
";
off
";
the empty string
autofocus
HTML elements
Automatically focus the element when the page is loaded
Boolean attribute
autoplay
audio
video
Hint that the
media resource
can be started automatically when the page is loaded
Boolean attribute
blocking
link
script
style
Whether the element is
potentially render-blocking
Unordered set of unique space-separated tokens
charset
meta
Character encoding declaration
utf-8
checked
input
Whether the control is checked
Boolean attribute
cite
blockquote
del
ins
Link to the source of the quotation or more information about the edit
Valid URL potentially surrounded by spaces
class
HTML elements
Classes to which the element belongs
Set of space-separated tokens
closedby
dialog
Which user actions will close the dialog
any
";
closerequest
";
none
";
color
link
Color to use when customizing a site's icon (for
rel
="
mask-icon
")
CSS

colorspace
input
The color space of the serialized color
limited-srgb
";
display-p3
cols
textarea
Maximum number of characters per line
Valid non-negative integer
greater than zero
colspan
td
th
Number of columns that the cell is to span
Valid non-negative integer
greater than zero
command
button
Indicates to the targeted element which action to take.
toggle-popover
";
show-popover
";
hide-popover
";
close
";
request-close
";
show-modal
";
custom command keyword
commandfor
button
Targets another element to be invoked.
ID
content
meta
Value of the element
Text
contenteditable
HTML elements
Whether the element is editable
true
";
false
";
plaintext-only
";
the empty string
controls
audio
video
img
Show user agent controls
Boolean attribute
coords
area
Coordinates for the shape to be created in an
image map
Valid list of floating-point numbers
crossorigin
audio
img
link
script
video
How the element handles crossorigin requests
anonymous
";
use-credentials
";
the empty string
data
object
Address of the resource
Valid non-empty URL potentially surrounded by spaces
datetime
del
ins
Date and (optionally) time of the change
Valid date string with optional time
datetime
time
Machine-readable value
Valid month string
valid date string
valid yearless date string
valid time string
valid local date and time string
valid time-zone offset string
valid global date and time string
valid week string
valid non-negative integer
, or
valid duration string
decoding
img
Decoding hint to use when processing this image for presentation
sync
";
async
";
auto
default
track
Enable the track if no other
text track
is more suitable
Boolean attribute
defer
script
Defer script execution
Boolean attribute
dir
HTML elements
The text directionality
of the element
ltr
"; "
rtl
"; "
auto
dir
bdo
The text directionality
of the element
ltr
"; "
rtl
dirname
input
textarea
Name of form control to use for sending the element's
directionality
in
form submission
Text
disabled
button
input
optgroup
option
select
textarea
form-associated custom elements
Whether the form control is disabled
Boolean attribute
disabled
fieldset
Whether the descendant form controls, except any inside
legend
, are disabled
Boolean attribute
disabled
link
Whether the link is disabled
Boolean attribute
area
Whether to download the resource instead of navigating to it, and its filename if so
Text
draggable
HTML elements
Whether the element is draggable
true
"; "
false
enctype
form
Entry list
encoding type to use for
form submission
application/x-www-form-urlencoded
"; "
multipart/form-data
"; "
text/plain
enterkeyhint
HTML elements
Hint for selecting an enter key action
enter
";
done
";
go
";
next
";
previous
";
";
send
fetchpriority
img
link
script
Sets the
priority
for
fetches
initiated by the element
auto
";
high
";
low
for
label
Associate the label with form control
ID
for
output
Specifies controls from which the output was calculated
Unordered set of unique space-separated tokens
consisting of IDs*
form
button
fieldset
input
object
output
select
textarea
form-associated custom elements
Associates the element with a
form
element
ID
formaction
button
input
URL
to use for
form submission
Valid non-empty URL potentially surrounded by spaces
formenctype
button
input
Entry list
encoding type to use for
form submission
application/x-www-form-urlencoded
"; "
multipart/form-data
"; "
text/plain
formmethod
button
input
Variant to use for
form submission
GET
";
POST
";
dialog
formnovalidate
button
input
Bypass form control validation for
form submission
Boolean attribute
formtarget
button
input
Navigable
for
form submission
Valid navigable target name or keyword
headers
td
th
The header cells for this cell
Unordered set of unique space-separated tokens
consisting of IDs*
headingoffset
HTML elements
Offsets heading levels for descendants
Valid non-negative integer
between 0 and 8
headingreset
HTML elements
Prevents a heading offset computation from traversing beyond the element with the attribute
Boolean attribute
height
canvas
embed
iframe
img
input
object
source
(in
picture
);
video
Vertical dimension
Valid non-negative integer
hidden
HTML elements
Whether the element is relevant
until-found
";
hidden
";
the empty string
high
meter
Low limit of high range
Valid floating-point number
href
area
Address of the
hyperlink
Valid URL potentially surrounded by spaces
href
link
Address of the
hyperlink
Valid non-empty URL potentially surrounded by spaces
href
base
Document base URL
Valid URL potentially surrounded by spaces
hreflang
link
Language of the linked resource
Valid BCP 47 language tag
http-equiv
meta
Pragma directive
content-type
";
default-style
";
refresh
";
x-ua-compatible
";
content-security-policy
id
HTML elements
The element's
ID
Text
imagesizes
link
Image sizes for different page layouts (for
rel
="
preload
")
Valid source size list
imagesrcset
link
Images to use in different situations, e.g., high-resolution displays, small monitors, etc. (for
rel
="
preload
")
Comma-separated list of
image candidate strings
inert
HTML elements
Whether the element is
inert
Boolean attribute
inputmode
HTML elements
Hint for selecting an input modality
none
";
text
";
tel
";
email
";
url
";
numeric
";
decimal
";
integrity
link
script
Integrity metadata used in
Subresource Integrity
checks
[SRI]
Text
is
HTML elements
Creates a
customized built-in element
Valid custom element name
of a defined
customized built-in element
ismap
img
Whether the image is a server-side image map
Boolean attribute
itemid
HTML elements
Global identifier
for a microdata item
Valid URL potentially surrounded by spaces
itemprop
HTML elements
Property names
of a microdata item
Unordered set of unique space-separated tokens
consisting of
valid absolute URLs
defined property names
, or text*
itemref
HTML elements
Referenced
elements
Unordered set of unique space-separated tokens
consisting of IDs*
itemscope
HTML elements
Introduces a microdata item
Boolean attribute
itemtype
HTML elements
Item types
of a microdata item
Unordered set of unique space-separated tokens
consisting of
valid absolute URLs
kind
track
The type of text track
subtitles
";
captions
";
descriptions
";
chapters
";
metadata
label
optgroup
option
track
User-visible label
Text
lang
HTML elements
Language
of the element
Valid BCP 47 language tag or the empty string
list
input
List of autocomplete options
ID
loading
iframe
img
audio
video
Used when determining loading deferral
lazy
";
eager
loop
audio
video
Whether to loop the
media resource
Boolean attribute
low
meter
High limit of low range
Valid floating-point number
max
input
Maximum value
Varies*
max
meter
progress
Upper bound of range
Valid floating-point number
maxlength
input
textarea
Maximum
length
of value
Valid non-negative integer
media
link
meta
source
style
Applicable media
Valid media query list
method
form
Variant to use for
form submission
GET
";
POST
";
dialog
min
input
Minimum value
Varies*
min
meter
Lower bound of range
Valid floating-point number
minlength
input
textarea
Minimum
length
of value
Valid non-negative integer
multiple
input
select
Whether to allow multiple values
Boolean attribute
muted
audio
video
Whether to mute the
media resource
by default
Boolean attribute
name
button
fieldset
input
output
select
textarea
form-associated custom elements
Name of the element to use for
form submission
and in the
form.elements
API
Text
name
details
Name of group of mutually-exclusive
details
elements
Text
name
form
Name of form to use in the
document.forms
API
Text
name
iframe
object
Name of
content navigable
Valid navigable target name or keyword
name
map
Name of
image map
to
reference
from the
usemap
attribute
Text
name
meta
Metadata name
Text
name
slot
Name of shadow tree slot
Text
nomodule
script
Prevents execution in user agents that support
module scripts
Boolean attribute
nonce
HTML elements
Cryptographic nonce used in
Content Security Policy
checks
[CSP]
Text
novalidate
form
Bypass form control validation for
form submission
Boolean attribute
open
details
Whether the details are visible
Boolean attribute
open
dialog
Whether the dialog box is showing
Boolean attribute
optimum
meter
Optimum value in gauge
Valid floating-point number
pattern
input
Pattern to be matched by the form control's value
Regular expression matching the JavaScript
Pattern
production
ping
area
URLs
to ping
Set of space-separated tokens
consisting of
valid non-empty URLs
placeholder
input
textarea
User-visible label to be placed within the form control
Text
playsinline
video
Encourage the user agent to display video content within the element's playback area
Boolean attribute
popover
HTML elements
Makes the element a
popover
element
auto
";
manual
";
hint
";
the empty string
popovertarget
button
input
Targets a popover element to toggle, show, or hide
ID
popovertargetaction
button
input
Indicates whether a targeted popover element is to be toggled, shown, or hidden
toggle
";
show
";
hide
poster
video
Poster frame to show prior to video playback
Valid non-empty URL potentially surrounded by spaces
preload
audio
video
Hints how much buffering the
media resource
will likely need
none
";
metadata
";
auto
";
the empty string
readonly
input
textarea
Whether to allow the value to be edited by the user
Boolean attribute
readonly
form-associated custom elements
Affects
willValidate
, plus any behavior added by the custom element author
Boolean attribute
referrerpolicy
area
iframe
img
link
script
Referrer policy
for
fetches
initiated by the element
Referrer policy
rel
area
Relationship between the location in the document containing the
hyperlink
and the destination resource
Unordered set of unique space-separated tokens
rel
link
Relationship between the document containing the
hyperlink
and the destination resource
Unordered set of unique space-separated tokens
required
input
select
textarea
Whether the control is required for
form submission
Boolean attribute
reversed
ol
Number the list backwards
Boolean attribute
rows
textarea
Number of lines to show
Valid non-negative integer
greater than zero
rowspan
td
th
Number of rows that the cell is to span
Valid non-negative integer
sandbox
iframe
Security rules for nested content
Unordered set of unique space-separated tokens
ASCII case-insensitive
, consisting of
allow-downloads
allow-forms
allow-modals
allow-orientation-lock
allow-pointer-lock
allow-popups
allow-popups-to-escape-sandbox
allow-presentation
allow-same-origin
allow-scripts
allow-top-navigation
allow-top-navigation-by-user-activation
allow-top-navigation-to-custom-protocols
scope
th
Specifies which cells the header cell applies to
row
";
col
";
rowgroup
";
colgroup
selected
option
Whether the option is selected by default
Boolean attribute
shadowrootclonable
template
Sets
clonable
on a declarative shadow root
Boolean attribute
shadowrootcustomelementregistry
template
Enables declarative shadow roots to indicate they will use a custom element registry
Boolean attribute
shadowrootdelegatesfocus
template
Sets
delegates focus
on a declarative shadow root
Boolean attribute
shadowrootmode
template
Enables streaming declarative shadow roots
open
";
closed
shadowrootserializable
template
Sets
serializable
on a declarative shadow root
Boolean attribute
shadowrootslotassignment
template
Sets
slot assignment
on a declarative shadow root
named
";
manual
shape
area
The kind of shape to be created in an
image map
circle
";
default
";
poly
";
rect
size
input
select
Size of the control
Valid non-negative integer
greater than zero
sizes
link
Sizes of the icons (for
rel
="
icon
")
Unordered set of unique space-separated tokens
ASCII case-insensitive
, consisting of sizes*
sizes
img
source
Image sizes for different page layouts
Valid source size list
slot
HTML elements
The element's desired slot
Text
span
col
colgroup
Number of columns spanned by the element
Valid non-negative integer
greater than zero
spellcheck
HTML elements
Whether the element is to have its spelling and grammar checked
true
";
false
";
the empty string
src
audio
embed
iframe
img
input
script
source
(in
video
or
audio
);
track
video
Address of the resource
Valid non-empty URL potentially surrounded by spaces
srcdoc
iframe
A document to render in the
iframe
The source of
an
iframe
srcdoc
document
srclang
track
Language of the text track
Valid BCP 47 language tag
srcset
img
source
Images to use in different situations, e.g., high-resolution displays, small monitors, etc.
Comma-separated list of
image candidate strings
start
ol
Starting value
of the list
Valid integer
step
input
Granularity to be matched by the form control's value
Valid floating-point number
greater than zero, or "
any
style
HTML elements
Presentational and formatting instructions
CSS declarations*
tabindex
HTML elements
Whether the element is
focusable
and
sequentially focusable
, and
the relative order of the element for the purposes of
sequential focus navigation
Valid integer
target
area
Navigable
for
hyperlink
Valid navigable target name or keyword
target
base
Default
navigable
for
hyperlink
and
form submission
Valid navigable target name or keyword
target
form
Navigable
for
form submission
Valid navigable target name or keyword
title
HTML elements
Advisory information for the element
Text
title
abbr
dfn
Full term or expansion of abbreviation
Text
title
input
Description of pattern (when used with
pattern
attribute)
Text
title
link
Title of the link
Text
title
link
style
CSS style sheet set name
Text
translate
HTML elements
Whether the element is to be translated when the page is localized
yes
"; "
no
"; the empty string
type
link
Hint for the type of the referenced resource
Valid MIME type string
type
button
Type of button
submit
";
reset
";
button
type
embed
object
source
Type of embedded resource
Valid MIME type string
type
input
Type of form control
input
type keyword
type
ol
Kind of list marker
";
";
";
";
type
script
Type of script
module
"; "
importmap
"; "
speculationrules
"; a
valid MIME type string
that is not a
JavaScript MIME type essence match
usemap
img
Name of
image map
to use
Valid hash-name reference
value
button
option
Value to be used for
form submission
Text
value
data
Machine-readable value
Text
value
input
Value of the form control
Varies*
value
li
Ordinal value
of the list item
Valid integer
value
meter
progress
Current value of the element
Valid floating-point number
width
canvas
embed
iframe
img
input
object
source
(in
picture
);
video
Horizontal dimension
Valid non-negative integer
wrap
textarea
How the value of the form control is to be wrapped for
form submission
soft
";
hard
writingsuggestions
HTML elements
Whether the element can offer writing suggestions or not.
true
";
false
";
the empty string
An asterisk (*) in a cell indicates that the actual rules are more
complicated than indicated in the table above.
HTMLElement/drag_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/dragend_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/dragenter_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/dragleave_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/dragover_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/dragstart_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
HTMLElement/drop_event
Support in all current engines.
Firefox
9+
Safari
3.1+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
List of event handler content attributes
Attribute
Element(s)
Description
Value
onafterprint
body
afterprint
event handler for
Window
object
Event handler content attribute
onauxclick
HTML elements
auxclick
event handler
Event handler content attribute
onbeforeinput
HTML elements
beforeinput
event handler
Event handler content attribute
onbeforematch
HTML elements
beforematch
event handler
Event handler content attribute
onbeforeprint
body
beforeprint
event handler for
Window
object
Event handler content attribute
onbeforeunload
body
beforeunload
event handler for
Window
object
Event handler content attribute
onbeforetoggle
HTML elements
beforetoggle
event handler
Event handler content attribute
onblur
HTML elements
blur
event handler
Event handler content attribute
oncancel
HTML elements
cancel
event handler
Event handler content attribute
oncanplay
HTML elements
canplay
event handler
Event handler content attribute
oncanplaythrough
HTML elements
canplaythrough
event handler
Event handler content attribute
onchange
HTML elements
change
event handler
Event handler content attribute
onclick
HTML elements
click
event handler
Event handler content attribute
onclose
HTML elements
close
event handler
Event handler content attribute
oncommand
HTML elements
command
event handler
Event handler content attribute
oncontextlost
HTML elements
contextlost
event handler
Event handler content attribute
oncontextmenu
HTML elements
contextmenu
event handler
Event handler content attribute
oncontextrestored
HTML elements
contextrestored
event handler
Event handler content attribute
oncopy
HTML elements
copy
event handler
Event handler content attribute
oncuechange
HTML elements
cuechange
event handler
Event handler content attribute
oncut
HTML elements
cut
event handler
Event handler content attribute
ondblclick
HTML elements
dblclick
event handler
Event handler content attribute
ondrag
HTML elements
drag
event handler
Event handler content attribute
ondragend
HTML elements
dragend
event handler
Event handler content attribute
ondragenter
HTML elements
dragenter
event handler
Event handler content attribute
ondragleave
HTML elements
dragleave
event handler
Event handler content attribute
ondragover
HTML elements
dragover
event handler
Event handler content attribute
ondragstart
HTML elements
dragstart
event handler
Event handler content attribute
ondrop
HTML elements
drop
event handler
Event handler content attribute
ondurationchange
HTML elements
durationchange
event handler
Event handler content attribute
onemptied
HTML elements
emptied
event handler
Event handler content attribute
onended
HTML elements
ended
event handler
Event handler content attribute
onerror
HTML elements
error
event handler
Event handler content attribute
onfocus
HTML elements
focus
event handler
Event handler content attribute
onformdata
HTML elements
formdata
event handler
Event handler content attribute
onhashchange
body
hashchange
event handler for
Window
object
Event handler content attribute
oninput
HTML elements
input
event handler
Event handler content attribute
oninvalid
HTML elements
invalid
event handler
Event handler content attribute
onkeydown
HTML elements
keydown
event handler
Event handler content attribute
onkeypress
HTML elements
keypress
event handler
Event handler content attribute
onkeyup
HTML elements
keyup
event handler
Event handler content attribute
onlanguagechange
body
languagechange
event handler for
Window
object
Event handler content attribute
onload
HTML elements
load
event handler
Event handler content attribute
onloadeddata
HTML elements
loadeddata
event handler
Event handler content attribute
onloadedmetadata
HTML elements
loadedmetadata
event handler
Event handler content attribute
onloadstart
HTML elements
loadstart
event handler
Event handler content attribute
onmessage
body
message
event handler for
Window
object
Event handler content attribute
onmessageerror
body
messageerror
event handler for
Window
object
Event handler content attribute
onmousedown
HTML elements
mousedown
event handler
Event handler content attribute
onmouseenter
HTML elements
mouseenter
event handler
Event handler content attribute
onmouseleave
HTML elements
mouseleave
event handler
Event handler content attribute
onmousemove
HTML elements
mousemove
event handler
Event handler content attribute
onmouseout
HTML elements
mouseout
event handler
Event handler content attribute
onmouseover
HTML elements
mouseover
event handler
Event handler content attribute
onmouseup
HTML elements
mouseup
event handler
Event handler content attribute
onoffline
body
offline
event handler for
Window
object
Event handler content attribute
ononline
body
online
event handler for
Window
object
Event handler content attribute
onpagehide
body
pagehide
event handler for
Window
object
Event handler content attribute
onpagereveal
body
pagereveal
event handler for
Window
object
Event handler content attribute
onpageshow
body
pageshow
event handler for
Window
object
Event handler content attribute
onpageswap
body
pageswap
event handler for
Window
object
Event handler content attribute
onpaste
HTML elements
paste
event handler
Event handler content attribute
onpause
HTML elements
pause
event handler
Event handler content attribute
onplay
HTML elements
play
event handler
Event handler content attribute
onplaying
HTML elements
playing
event handler
Event handler content attribute
onpopstate
body
popstate
event handler for
Window
object
Event handler content attribute
onprogress
HTML elements
progress
event handler
Event handler content attribute
onratechange
HTML elements
ratechange
event handler
Event handler content attribute
onreset
HTML elements
reset
event handler
Event handler content attribute
onresize
HTML elements
resize
event handler
Event handler content attribute
onrejectionhandled
body
rejectionhandled
event handler for
Window
object
Event handler content attribute
onscroll
HTML elements
scroll
event handler
Event handler content attribute
onscrollend
HTML elements
scrollend
event handler
Event handler content attribute
onsecuritypolicyviolation
HTML elements
securitypolicyviolation
event handler
Event handler content attribute
onseeked
HTML elements
seeked
event handler
Event handler content attribute
onseeking
HTML elements
seeking
event handler
Event handler content attribute
onselect
HTML elements
select
event handler
Event handler content attribute
onslotchange
HTML elements
slotchange
event handler
Event handler content attribute
onstalled
HTML elements
stalled
event handler
Event handler content attribute
onstorage
body
storage
event handler for
Window
object
Event handler content attribute
onsubmit
HTML elements
submit
event handler
Event handler content attribute
onsuspend
HTML elements
suspend
event handler
Event handler content attribute
ontimeupdate
HTML elements
timeupdate
event handler
Event handler content attribute
ontoggle
HTML elements
toggle
event handler
Event handler content attribute
onunhandledrejection
body
unhandledrejection
event handler for
Window
object
Event handler content attribute
onunload
body
unload
event handler for
Window
object
Event handler content attribute
onvolumechange
HTML elements
volumechange
event handler
Event handler content attribute
onwaiting
HTML elements
waiting
event handler
Event handler content attribute
onwheel
HTML elements
wheel
event handler
Event handler content attribute
Element interfaces
This section is non-normative.
List of interfaces for elements
Element(s)
Interface(s)
HTMLAnchorElement
HTMLElement
abbr
HTMLElement
address
HTMLElement
area
HTMLAreaElement
HTMLElement
article
HTMLElement
aside
HTMLElement
audio
HTMLAudioElement
HTMLMediaElement
HTMLElement
HTMLElement
base
HTMLBaseElement
HTMLElement
bdi
HTMLElement
bdo
HTMLElement
blockquote
HTMLQuoteElement
HTMLElement
body
HTMLBodyElement
HTMLElement
br
HTMLBRElement
HTMLElement
button
HTMLButtonElement
HTMLElement
canvas
HTMLCanvasElement
HTMLElement
caption
HTMLTableCaptionElement
HTMLElement
cite
HTMLElement
code
HTMLElement
col
HTMLTableColElement
HTMLElement
colgroup
HTMLTableColElement
HTMLElement
data
HTMLDataElement
HTMLElement
datalist
HTMLDataListElement
HTMLElement
dd
HTMLElement
del
HTMLModElement
HTMLElement
details
HTMLDetailsElement
HTMLElement
dfn
HTMLElement
dialog
HTMLDialogElement
HTMLElement
div
HTMLDivElement
HTMLElement
dl
HTMLDListElement
HTMLElement
dt
HTMLElement
em
HTMLElement
embed
HTMLEmbedElement
HTMLElement
fieldset
HTMLFieldSetElement
HTMLElement
figcaption
HTMLElement
figure
HTMLElement
footer
HTMLElement
form
HTMLFormElement
HTMLElement
h1
HTMLHeadingElement
HTMLElement
h2
HTMLHeadingElement
HTMLElement
h3
HTMLHeadingElement
HTMLElement
h4
HTMLHeadingElement
HTMLElement
h5
HTMLHeadingElement
HTMLElement
h6
HTMLHeadingElement
HTMLElement
head
HTMLHeadElement
HTMLElement
header
HTMLElement
hgroup
HTMLElement
hr
HTMLHRElement
HTMLElement
html
HTMLHtmlElement
HTMLElement
HTMLElement
iframe
HTMLIFrameElement
HTMLElement
img
HTMLImageElement
HTMLElement
input
HTMLInputElement
HTMLElement
ins
HTMLModElement
HTMLElement
kbd
HTMLElement
label
HTMLLabelElement
HTMLElement
legend
HTMLLegendElement
HTMLElement
li
HTMLLIElement
HTMLElement
link
HTMLLinkElement
HTMLElement
main
HTMLElement
map
HTMLMapElement
HTMLElement
mark
HTMLElement
HTMLMenuElement
HTMLElement
meta
HTMLMetaElement
HTMLElement
meter
HTMLMeterElement
HTMLElement
nav
HTMLElement
noscript
HTMLElement
object
HTMLObjectElement
HTMLElement
ol
HTMLOListElement
HTMLElement
optgroup
HTMLOptGroupElement
HTMLElement
option
HTMLOptionElement
HTMLElement
output
HTMLOutputElement
HTMLElement
HTMLParagraphElement
HTMLElement
picture
HTMLPictureElement
HTMLElement
pre
HTMLPreElement
HTMLElement
progress
HTMLProgressElement
HTMLElement
HTMLQuoteElement
HTMLElement
rp
HTMLElement
rt
HTMLElement
ruby
HTMLElement
HTMLElement
samp
HTMLElement
HTMLElement
script
HTMLScriptElement
HTMLElement
section
HTMLElement
select
HTMLSelectElement
HTMLElement
selectedcontent
HTMLSelectedContentElement
HTMLElement
slot
HTMLSlotElement
HTMLElement
small
HTMLElement
source
HTMLSourceElement
HTMLElement
span
HTMLSpanElement
HTMLElement
strong
HTMLElement
style
HTMLStyleElement
HTMLElement
sub
HTMLElement
summary
HTMLElement
sup
HTMLElement
table
HTMLTableElement
HTMLElement
tbody
HTMLTableSectionElement
HTMLElement
td
HTMLTableCellElement
HTMLElement
template
HTMLTemplateElement
HTMLElement
textarea
HTMLTextAreaElement
HTMLElement
tfoot
HTMLTableSectionElement
HTMLElement
th
HTMLTableCellElement
HTMLElement
thead
HTMLTableSectionElement
HTMLElement
time
HTMLTimeElement
HTMLElement
title
HTMLTitleElement
HTMLElement
tr
HTMLTableRowElement
HTMLElement
track
HTMLTrackElement
HTMLElement
HTMLElement
ul
HTMLUListElement
HTMLElement
var
HTMLElement
video
HTMLVideoElement
HTMLMediaElement
HTMLElement
wbr
HTMLElement
custom elements
supplied by the element's author (inherits from
HTMLElement
All interfaces
This section is non-normative.
AudioTrack
AudioTrackList
BarProp
BeforeUnloadEvent
BroadcastChannel
CanvasGradient
CanvasPattern
CanvasRenderingContext2D
CloseWatcher
CommandEvent
CustomElementRegistry
CustomStateSet
DOMParser
DOMStringList
DOMStringMap
DataTransfer
DataTransferItem
DataTransferItemList
DedicatedWorkerGlobalScope
Document
partial 1
DragEvent
Element
partial
ElementInternals
ErrorEvent
EventSource
External
FormDataEvent
HTMLAllCollection
HTMLAnchorElement
partial
HTMLAreaElement
partial
HTMLAudioElement
HTMLBRElement
partial
HTMLBaseElement
HTMLBodyElement
partial
HTMLButtonElement
HTMLCanvasElement
HTMLDListElement
partial
HTMLDataElement
HTMLDataListElement
HTMLDetailsElement
HTMLDialogElement
HTMLDirectoryElement
HTMLDivElement
partial
HTMLElement
HTMLEmbedElement
partial
HTMLFieldSetElement
HTMLFontElement
HTMLFormControlsCollection
HTMLFormElement
HTMLFrameElement
HTMLFrameSetElement
HTMLHRElement
partial
HTMLHeadElement
HTMLHeadingElement
partial
HTMLHtmlElement
partial
HTMLIFrameElement
partial
HTMLImageElement
partial
HTMLInputElement
partial
HTMLLIElement
partial
HTMLLabelElement
HTMLLegendElement
partial
HTMLLinkElement
partial
HTMLMapElement
HTMLMarqueeElement
HTMLMediaElement
HTMLMenuElement
partial
HTMLMetaElement
partial
HTMLMeterElement
HTMLModElement
HTMLOListElement
partial
HTMLObjectElement
partial
HTMLOptGroupElement
HTMLOptionElement
HTMLOptionsCollection
HTMLOutputElement
HTMLParagraphElement
partial
HTMLParamElement
HTMLPictureElement
HTMLPreElement
partial
HTMLProgressElement
HTMLQuoteElement
HTMLScriptElement
partial
HTMLSelectElement
HTMLSelectedContentElement
HTMLSlotElement
HTMLSourceElement
HTMLSpanElement
HTMLStyleElement
partial
HTMLTableCaptionElement
partial
HTMLTableCellElement
partial
HTMLTableColElement
partial
HTMLTableElement
partial
HTMLTableRowElement
partial
HTMLTableSectionElement
partial
HTMLTemplateElement
HTMLTextAreaElement
HTMLTimeElement
HTMLTitleElement
HTMLTrackElement
HTMLUListElement
partial
HTMLUnknownElement
HTMLVideoElement
HashChangeEvent
History
ImageBitmap
ImageBitmapRenderingContext
ImageData
Location
MediaError
MessageChannel
MessageEvent
MessagePort
MimeType
MimeTypeArray
NavigateEvent
NavigationActivation
NavigationCurrentEntryChangeEvent
NavigationDestination
NavigationHistoryEntry
NavigationPrecommitController
NavigationTransition
Navigator
partial
NotRestoredReasonDetails
NotRestoredReasons
OffscreenCanvas
OffscreenCanvasRenderingContext2D
Origin
PageRevealEvent
PageSwapEvent
PageTransitionEvent
Path2D
Plugin
PluginArray
PopStateEvent
PromiseRejectionEvent
RadioNodeList
Range
partial
ShadowRoot
partial
SharedWorker
SharedWorkerGlobalScope
Storage
StorageEvent
SubmitEvent
TextMetrics
TextTrack
TextTrackCue
TextTrackCueList
TextTrackList
TimeRanges
ToggleEvent
TrackEvent
UserActivation
ValidityState
VideoTrack
VideoTrackList
VisibilityStateEntry
Window
partial
Worker
WorkerGlobalScope
WorkerLocation
WorkerNavigator
Worklet
WorkletGlobalScope
XMLSerializer
Events
This section is non-normative.
The following table lists events fired by this document, excluding those
already defined in
media element events
and
drag-and-drop events
List of events
Event
Interface
Interesting targets
Description
DOMContentLoaded
Window/DOMContentLoaded_event
Support in all current engines.
Firefox
1+
Safari
3.1+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
10.1+
Event
Document
Fired at the
Document
once the parser has finished
afterprint
Window/afterprint_event
Support in all current engines.
Firefox
6+
Safari
13+
Chrome
63+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
Window
Fired at the
Window
after printing
beforeprint
Window/beforeprint_event
Support in all current engines.
Firefox
6+
Safari
13+
Chrome
63+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
Window
Fired at the
Window
before printing
beforematch
Element/beforematch_event
Support in one engine only.
Firefox
No
Safari
No
Chrome
102+
Opera
No
Edge
102+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
Elements
Fired on elements with the
hidden=until-found
attribute before they are
revealed.
beforetoggle
HTMLElement/beforetoggle_event
Support in all current engines.
Firefox
🔰 114+
Safari
preview+
Chrome
114+
Opera
Edge
114+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
ToggleEvent
Elements
Fired on elements with the
popover
attribute when they
are transitioning between showing and hidden
beforeunload
Window/beforeunload_event
Support in all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
12+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
4+
Firefox Android
Safari iOS
1+
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
BeforeUnloadEvent
Window
Fired at the
Window
when the page is about to be unloaded, in case the page would like to show a warning prompt
blur
Event
Window
, elements
Fired at nodes when they stop being
focused
cancel
HTMLDialogElement/cancel_event
Support in all current engines.
Firefox
98+
Safari
15.4+
Chrome
37+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
No
WebView Android
Samsung Internet
Opera Android
Event
CloseWatcher
dialog
elements,
input
elements
Fired at
CloseWatcher
objects or
dialog
elements when they receive a
close request
, or at
input
elements whose
type
attribute is in the
File
state when the user does not change their selection
change
HTMLElement/change_event
Support in all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
9+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
10.1+
Event
Form controls
Fired at controls when the user commits a value change (see also the
input
event)
click
PointerEvent
Elements
Normally a mouse event; also synthetically fired at an element before its
activation behavior
is run, when an element is activated from a non-pointer input device (e.g. a keyboard)
close
HTMLDialogElement/close_event
Support in all current engines.
Firefox
98+
Safari
15.4+
Chrome
37+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
CloseWatcher
dialog
elements,
MessagePort
Fired at
CloseWatcher
objects or
dialog
elements when they are closed via a
close request
or via web developer code, or at
MessagePort
objects when
disentangled
command
CommandEvent
Elements
Fired at elements when they handle a user invocation, via a
commandfor
attribute.
connect
SharedWorkerGlobalScope/connect_event
Support in all current engines.
Firefox
29+
Safari
16+
Chrome
4+
Opera
10.6+
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
16+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
11+
MessageEvent
SharedWorkerGlobalScope
Fired at a shared worker's global scope when a new client connects
contextlost
HTMLCanvasElement/webglcontextlost_event
Support in one engine only.
Firefox
No
Safari
No
Chrome
98+
Opera
Edge
98+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
canvas
elements,
OffscreenCanvas
objects
Fired when the corresponding
CanvasRenderingContext2D
or
OffscreenCanvasRenderingContext2D
is lost
contextrestored
HTMLCanvasElement/contextrestored_event
Support in one engine only.
Firefox
No
Safari
No
Chrome
98+
Opera
Edge
98+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
Event
canvas
elements,
OffscreenCanvas
objects
Fired when the corresponding
CanvasRenderingContext2D
or
OffscreenCanvasRenderingContext2D
is restored after being lost
currententrychange
NavigationCurrentEntryChangeEvent
Fired when
navigation.currentEntry
changes
dispose
Event
NavigationHistoryEntry
Fired when the
session history entry
corresponding to the
NavigationHistoryEntry
has been permanently evicted from session history and can no longer be traversed to
error
EventSource/error_event
Support in all current engines.
Firefox
6+
Safari
5+
Chrome
6+
Opera
12+
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
45+
Safari iOS
5+
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
Window/error_event
Support in all current engines.
Firefox
6+
Safari
5.1+
Chrome
10+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
Event
or
ErrorEvent
Global scope objects,
Worker
objects, elements, networking-related objects
Fired when unexpected errors occur (e.g. networking errors, script errors, decoding errors)
focus
Event
Window
, elements
Fired at nodes
gaining focus
formdata
HTMLFormElement/formdata_event
Support in all current engines.
Firefox
72+
Safari
15+
Chrome
77+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
FormDataEvent
form
elements
Fired at a
form
element when it is
constructing the entry list
hashchange
Window/hashchange_event
Support in all current engines.
Firefox
3.6+
Safari
5+
Chrome
8+
Opera
10.6+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
8+
Firefox Android
Safari iOS
5+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
11+
HashChangeEvent
Window
Fired at the
Window
when the
fragment
part of the document's
URL
changes
input
Event
Elements
Fired when the user changes the
contenteditable
element's content, or the form control's value. See also the
change
event for form controls.
invalid
HTMLInputElement/invalid_event
Support in all current engines.
Firefox
4+
Safari
5+
Chrome
10+
Opera
10+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
10+
Firefox Android
64+
Safari iOS
5+
Chrome Android
WebView Android
4+
Samsung Internet
4.0+
Opera Android
12+
Event
Form controls
Fired at controls during form validation if they do not satisfy their constraints
languagechange
Window/languagechange_event
Support in all current engines.
Firefox
32+
Safari
10.1+
Chrome
37+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
4+
Safari iOS
Chrome Android
WebView Android
Samsung Internet
4.0+
Opera Android
WorkerGlobalScope/languagechange_event
Support in all current engines.
Firefox
74+
Safari
4+
Chrome
4+
Opera
11.5+
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
5+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
Event
Global scope objects
Fired at the global scope object when the user's preferred languages change
load
Event
Window
, elements
Fired at the
Window
when the document has finished loading; fired at an element containing a resource (e.g.
img
embed
) when its resource has finished loading
message
BroadcastChannel/message_event
Support in all current engines.
Firefox
38+
Safari
15.4+
Chrome
54+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
DedicatedWorkerGlobalScope/message_event
Support in all current engines.
Firefox
3.5+
Safari
4+
Chrome
4+
Opera
10.6+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
10+
Firefox Android
Safari iOS
5+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
11.5+
EventSource/message_event
Support in all current engines.
Firefox
6+
Safari
5+
Chrome
6+
Opera
12+
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
45+
Safari iOS
5+
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
MessagePort/message_event
Support in all current engines.
Firefox
41+
Safari
5+
Chrome
2+
Opera
10.6+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
10+
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
11.5+
Window/message_event
Support in all current engines.
Firefox
9+
Safari
4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
8+
Firefox Android
Safari iOS
4+
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
Worker/message_event
Support in all current engines.
Firefox
3.5+
Safari
4+
Chrome
4+
Opera
10.6+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
10+
Firefox Android
Safari iOS
5+
Chrome Android
WebView Android
Samsung Internet
Opera Android
11.5+
MessageEvent
Window
EventSource
MessagePort
BroadcastChannel
DedicatedWorkerGlobalScope
Worker
ServiceWorkerContainer
Fired at an object when it receives a message
messageerror
BroadcastChannel/messageerror_event
Support in all current engines.
Firefox
57+
Safari
15.4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
DedicatedWorkerGlobalScope/messageerror_event
Support in all current engines.
Firefox
57+
Safari
16.4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
MessagePort/messageerror_event
Support in all current engines.
Firefox
57+
Safari
16.4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
Window/messageerror_event
Support in all current engines.
Firefox
57+
Safari
16.4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
Worker/messageerror_event
Support in all current engines.
Firefox
57+
Safari
16.4+
Chrome
60+
Opera
Edge
79+
Edge (Legacy)
18
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
47+
MessageEvent
Window
MessagePort
BroadcastChannel
DedicatedWorkerGlobalScope
Worker
ServiceWorkerContainer
Fired at an object when it receives a message that cannot be deserialized
navigate
NavigateEvent
Fired before the
navigable
navigates
reloads
traverses
, or
otherwise
changes its URL
navigateerror
ErrorEvent
Fired when a navigation does not complete successfully
navigatesuccess
Event
Fired when a navigation completes successfully
offline
Window/offline_event
Support in all current engines.
Firefox
9+
Safari
4+
Chrome
3+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
3+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
Event
Global scope objects
Fired at the global scope object when the network connections fails
online
Window/online_event
Support in all current engines.
Firefox
9+
Safari
4+
Chrome
3+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
3+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
Event
Global scope objects
Fired at the global scope object when the network connections returns
open
EventSource/open_event
Support in all current engines.
Firefox
6+
Safari
5+
Chrome
6+
Opera
12+
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
45+
Safari iOS
5+
Chrome Android
WebView Android
Samsung Internet
Opera Android
12+
Event
EventSource
Fired at
EventSource
objects when a connection is established
pageswap
PageSwapEvent
Window
Fired at the
Window
right before a document is
unloaded
as a result of a navigation.
pagehide
Window/pagehide_event
Support in all current engines.
Firefox
6+
Safari
5+
Chrome
3+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
11
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
PageTransitionEvent
Window
Fired at the
Window
when the page's
session history entry
stops
being the
active entry
pagereveal
PageRevealEvent
Window
Fired at the
Window
when the page begins to render for the first time after
it has been initialized or
reactivated
pageshow
Window/pageshow_event
Support in all current engines.
Firefox
6+
Safari
5+
Chrome
3+
Opera
Edge
79+
Edge (Legacy)
12+
Internet Explorer
11
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
PageTransitionEvent
Window
Fired at the
Window
when the page's
session history entry
becomes the
active entry
pointercancel
PointerEvent
Elements and
Text
nodes
Fired at the
source node
when the user attempts to initiate a drag-and-drop operation
popstate
Window/popstate_event
Support in all current engines.
Firefox
4+
Safari
5+
Chrome
5+
Opera
11.5+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
10+
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
11.5+
PopStateEvent
Window
Fired at the
Window
when in some cases of
session history traversal
readystatechange
Document/readystatechange_event
Support in all current engines.
Firefox
4+
Safari
5.1+
Chrome
9+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
4+
Firefox Android
Safari iOS
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
12.1+
Event
Document
Fired at the
Document
when it finishes parsing and again when all its subresources have finished loading
rejectionhandled
PromiseRejectionEvent
Global scope objects
Fired at global scope objects when a previously-unhandled promise rejection becomes handled
reset
HTMLFormElement/reset_event
Support in all current engines.
Firefox
6+
Safari
3+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
1+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
12.1+
Event
form
elements
Fired at a
form
element when it is
reset
select
HTMLInputElement/select_event
Support in all current engines.
Firefox
6+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12.1+
HTMLTextAreaElement/select_event
Support in all current engines.
Firefox
6+
Safari
1+
Chrome
1+
Opera
12.1+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
12.1+
Event
Form controls
Fired at form controls when their text selection is adjusted (whether by an API or by the user)
storage
Window/storage_event
Support in all current engines.
Firefox
45+
Safari
4+
Chrome
1+
Opera
Edge
79+
Edge (Legacy)
15+
Internet Explorer
9+
Firefox Android
Safari iOS
4+
Chrome Android
WebView Android
37+
Samsung Internet
Opera Android
StorageEvent
Window
Fired at
Window
event when the corresponding
localStorage
or
sessionStorage
storage areas change
submit
HTMLFormElement/submit_event
Support in all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
8+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
9+
Firefox Android
Safari iOS
1+
Chrome Android
WebView Android
Samsung Internet
Opera Android
10.1+
SubmitEvent
form
elements
Fired at a
form
element when it is
submitted
toggle
HTMLDetailsElement/toggle_event
Support in all current engines.
Firefox
49+
Safari
10.1+
Chrome
36+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
HTMLElement/toggle_event
Support in all current engines.
Firefox
🔰 114+
Safari
preview+
Chrome
114+
Opera
Edge
114+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
Chrome Android
WebView Android
Samsung Internet
Opera Android
ToggleEvent
details
and
popover
elements
Fired at
details
elements when they open or close; fired on elements with the
popover
attribute when they are transitioning between
showing and hidden
unhandledrejection
Window/unhandledrejection_event
Support in all current engines.
Firefox
69+
Safari
11+
Chrome
49+
Opera
Edge
79+
Edge (Legacy)
Internet Explorer
No
Firefox Android
Safari iOS
11.3+
Chrome Android
WebView Android
Samsung Internet
Opera Android
PromiseRejectionEvent
Global scope objects
Fired at global scope objects when a promise rejection goes unhandled
unload
Window/unload_event
Support in all current engines.
Firefox
1+
Safari
3+
Chrome
1+
Opera
4+
Edge
79+
Edge (Legacy)
12+
Internet Explorer
4+
Firefox Android
Safari iOS
1+
Chrome Android
WebView Android
Samsung Internet
Opera Android
10.1+
Event
Window
Fired at the
Window
object when the page is going away
visibilitychange
Document/visibilitychange_event
Support in all current engines.
Firefox
56+
Safari
14.1+
Chrome
62+
Opera
49+
Edge
79+
Edge (Legacy)
18
Internet Explorer
🔰 10+
Firefox Android
Safari iOS
Chrome Android
WebView Android
62+
Samsung Internet
Opera Android
46+
Event
Document
Fired at the
Document
object when the page becomes visible or hidden to the
user
HTTP headers
This section is non-normative.
The following HTTP request headers are defined by this specification:
Last-Event-ID
Ping-From
Ping-To
The following HTTP response headers are defined by this specification:
Cross-Origin-Embedder-Policy
Cross-Origin-Embedder-Policy-Report-Only
Cross-Origin-Opener-Policy
Cross-Origin-Opener-Policy-Report-Only
Origin-Agent-Cluster
Refresh
X-Frame-Options
MIME types
This section is non-normative.
The following MIME types are mentioned in this specification:
application/atom+xml
Atom
[ATOM]
application/json
JSON
[JSON]
application/octet-stream
Generic binary data
[RFC2046]
application/microdata+json
Microdata as JSON
application/rss+xml
RSS
application/wasm
WebAssembly
[WASM]
application/x-www-form-urlencoded
Form submission
application/xhtml+xml
HTML
application/xml
XML
[XML]
[RFC7303]
image/gif
GIF images
[GIF]
image/jpeg
JPEG images
[JPEG]
image/png
PNG images
[PNG]
image/svg+xml
SVG images
[SVG]
multipart/form-data
Form submission
[RFC7578]
multipart/mixed
Generic mixed content
[RFC2046]
multipart/x-mixed-replace
Streaming server push
text/css
CSS
[CSS]
text/event-stream
Server-sent event streams
text/javascript
JavaScript
[JAVASCRIPT]
[RFC9239]
text/json
JSON (legacy type)
text/plain
Generic plain text
[RFC2046]
[RFC3676]
text/html
HTML
text/ping
Hyperlink auditing
text/uri-list
List of URLs
[RFC2483]
text/vcard
vCard
[RFC6350]
text/vtt
WebVTT
[WEBVTT]
text/xml
XML
[XML]
[RFC7303]
video/mp4
MPEG-4 video
[RFC4337]
video/mpeg
MPEG video
[RFC2046]