HTML
Living Standard — Last Updated 7 March 2021
Living Standard — Last Updated 7 March 2021
HTML/HTML5/HTML5_Parser#Inline_SVG_and_MathML_support
Support in all current engines.
The
MathML
math
element
falls
into
the
embedded
content
,
phrasing
content
,
flow
content
,
and
palpable
content
categories
for
the
purposes
of
the
content
models
in
this
specification.
When
the
MathML
annotation-xml
element
contains
elements
from
the
HTML
namespace
,
such
elements
must
all
be
flow
content
.
When
the
MathML
token
elements
(
mi
,
mo
,
mn
,
ms
,
and
mtext
)
are
descendants
of
HTML
elements,
they
may
contain
phrasing
content
elements
from
the
HTML
namespace
.
User
agents
must
handle
text
other
than
inter-element
whitespace
found
in
MathML
elements
whose
content
models
do
not
allow
straight
text
by
pretending
for
the
purposes
of
MathML
content
models,
layout,
and
rendering
that
the
text
is
actually
wrapped
in
a
MathML
mtext
element.
(Such
text
is
not,
however,
conforming.)
User
agents
must
act
as
if
any
MathML
element
whose
contents
does
not
match
the
element's
content
model
was
replaced,
for
the
purposes
of
MathML
layout
and
rendering,
by
a
MathML
merror
element
containing
some
appropriate
error
message.
The semantics of MathML elements are defined by MathML and other applicable specifications . [MATHML]
Here is an example of the use of MathML in an HTML document:
<!DOCTYPE html>
<html lang="en">
<head>
<title>The quadratic formula</title>
</head>
<body>
<h1>The quadratic formula</h1>
<p>
<math>
<mi>x</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mo form="prefix">−</mo> <mi>b</mi>
<mo>±</mo>
<msqrt>
<msup> <mi>b</mi> <mn>2</mn> </msup>
<mo>−</mo>
<mn>4</mn> <mo></mo> <mi>a</mi> <mo></mo> <mi>c</mi>
</msqrt>
</mrow>
<mrow>
<mn>2</mn> <mo></mo> <mi>a</mi>
</mrow>
</mfrac>
</math>
</p>
</body>
</html>
HTML/HTML5/HTML5_Parser#Inline_SVG_and_MathML_support
Support in all current engines.
The
SVG
svg
element
falls
into
the
embedded
content
,
phrasing
content
,
flow
content
,
and
palpable
content
categories
for
the
purposes
of
the
content
models
in
this
specification.
When
the
SVG
foreignObject
element
contains
elements
from
the
HTML
namespace
,
such
elements
must
all
be
flow
content
.
The
content
model
for
the
SVG
title
element
inside
HTML
documents
is
phrasing
content
.
(This
further
constrains
the
requirements
given
in
SVG
2
.)
The semantics of SVG elements are defined by SVG 2 and other applicable specifications . [SVG]
getSVGDocument
()
getSVGDocument
()
getSVGDocument
()
Returns
the
Document
object,
in
the
case
of
iframe
,
embed
,
or
object
elements
being
used
to
embed
SVG.
The
getSVGDocument()
method
must
run
the
following
steps:
Let document be this element's content document .
If
document
is
non-null
and
was
created
by
the
page
load
processing
model
for
XML
files
section
because
the
computed
type
of
the
resource
in
the
navigate
algorithm
was
image/svg+xml
,
then
return
document
.
Return null.
Author
requirements
:
The
width
and
height
attributes
on
img
,
iframe
,
embed
,
object
,
video
,
source
when
the
parent
is
a
picture
element
and,
when
their
type
attribute
is
in
the
Image
Button
state,
input
elements
may
be
specified
to
give
the
dimensions
of
the
visual
content
of
the
element
(the
width
and
height
respectively,
relative
to
the
nominal
direction
of
the
output
medium),
in
CSS
pixels
.
The
attributes,
if
specified,
must
have
values
that
are
valid
non-negative
integers
.
The specified dimensions given may differ from the dimensions specified in the resource itself, since the resource may have a resolution that differs from the CSS pixel resolution. (On screens, CSS pixels have a resolution of 96ppi, but in general the CSS pixel resolution depends on the reading distance.) If both attributes are specified, then one of the following statements must be true:
The
target
ratio
is
the
ratio
of
the
intrinsic
width
to
the
intrinsic
height
in
the
resource.
The
specified
width
and
specified
height
are
the
values
of
the
width
and
height
attributes
respectively.
The two attributes must be omitted if the resource in question does not have both an intrinsic width and an intrinsic height .
If the two attributes are both zero, it indicates that the element is not intended for the user (e.g. it might be a part of a service to count page views).
The dimension attributes are not intended to be used to stretch the image.
User agent requirements : User agents are expected to use these attributes as hints for the rendering .
Support in all current engines.
Support in all current engines.
The
width
and
height
IDL
attributes
on
the
iframe
,
embed
,
object
,
source
,
and
video
elements
must
reflect
the
respective
content
attributes
of
the
same
name.
For
iframe
,
embed
and
object
the
IDL
attributes
are
DOMString
;
for
video
and
source
the
IDL
attributes
are
unsigned
long
.
The
corresponding
IDL
attributes
for
img
and
input
elements
are
defined
in
those
respective
elements'
sections,
as
they
are
slightly
more
specific
to
those
elements'
other
behaviors.