HTML and CSS Reference
In-Depth Information
Descendant, Child, and Adjacent Sibling Selectors
# of
# of
# of
Selector
IDs
Classes
Elements
In English
h1 em
Any
em
contained within any
h1
0,
0,
2
p > img
Any
img
that is the child of a
p
0,
0,
2
div#sidebar h3 + p
Any
p
that immediately follows
an
h3
contained within a
div
with
the ID of
sidebar
1,
0,
3
div#header ul#nav
Any anchor (
a
) contained
2,
1,
4
li.current a
within an
li
with a class of
current
, which is a descendant of
a
ul
with the ID of
nav
, contained
within a
div
with the ID of
header
Attribute Selectors
Attribute selectors are considered classes in the specificity calculation, even when the targeted
attribute is an ID.
# of
# of
# of
Selector
IDs
Classes
Elements
In English
input[type=text]
The contents of any
input
with a value of
text
in the
type attribute
0,
1,
1
a[href~=".org"]
The contents of any
a
with
an
href
value that includes
.org
0,
1,
1
dl#address dd h3[title]
The contents of any
h3
that
has any value set in its
title
attribute, and that is con-
tained within a
dd
that is
a descendant of a
dl
with
the ID of
address
1,
0,
3
