What Is the :nth-child() CSS Selector?
:nth-child() selects one or more child elements among their direct siblings regardless of node types.
Syntax of the CSS :nth-child()
Selector
:nth-child()
accepts one argument only. Here is the syntax:
html-element:nth-child(value) {
style declarations
}
The value
argument can be one of the following:
- A number: For instance, using
3
represents the third child. - The keyword
even
orodd
: We use it to represent even or odd children. - The formula
An+B
: We use it to express a series of numbers. For instance,2n+3
expresses these numbers:[(2x0)+3]
,[(2x1)+3]
,[(2x2)+3]
,[(2x3)+3]
, and so on.
Note the following:
:nth-child()
is a CSS pseudo-class selector.- The
:nth-child()
selector works on direct siblings only. - In the
An+B
formula,
Examples of the CSS :nth-child()
Selector
Below are examples of how to use the CSS :nth-child()
pseudo-class selector.
Apply DeepPink to the <p>
node that is its parent's third child
The :nth-child()
selector below selects the <p>
element that is its parent's third child.
p:nth-child(3) {
color: DeepPink;
}
Suppose the snippet below is the HTML document for the above CSS ruleset. Browsers will apply DeepPink
to the second <p>
element only.
<h1>First heading 1 element</h1>
<p>First paragraph element</p>
<p>Second paragraph element</p>
<h2>First heading 2 element</h2>
<p>Third paragraph element</p>
<h3>First heading 3 element</h3>
<p>Fourth paragraph element</p>
<p>Fifth paragraph element</p>
The :nth-child()
selector works on direct siblings only. For instance, suppose you re-write the HTML snippet above to include nested elements as follows:
<article>
<h1>Article's first heading 1 element</h1>
<p>Article's first paragraph element</p>
<h2>Article's first heading 2 element</h2>
<p>Article's second paragraph element</p>
<section>
<h3>Article's first heading 3 element</h3>
<p>Article's third paragraph element</p>
<p>Article's fourth paragraph element</p>
</section>
<h2>Article's second heading 2 element</h2>
<p>Article's fifth paragraph element</p>
<p>Article's sixth paragraph element</p>
</article>
The p:nth-child(3)
selector will apply DeepPink
only to the fourth <p>
node because it is the third child of its parent.
Express Your Love for Coding!
Apply DeepPink to every odd child that is a <p>
node
The :nth-child()
selector below selects every odd child element that is a <p>
node.
p:nth-child(odd) {
color: DeepPink;
}
1
is the index position of the first child element.
Assuming the snippet below is the HTML document for the above CSS ruleset, browsers will apply DeepPink
to the fourth <p>
element only.
<h1>First heading 1 element</h1>
<p>First paragraph element</p>
<h2>First heading 2 element</h2>
<p>Second paragraph element</p>
<h3>First heading 3 element</h3>
<p>Third paragraph element</p>
<p>Fourth paragraph element</p>
Apply DeepPink to every even child that is a <p>
node
The :nth-child()
selector below selects every even child element that is a <p>
node.
p:nth-child(even) {
color: DeepPink;
}
1
is the index position of the first child element.
Assuming the snippet below is the HTML document for the above CSS ruleset, browsers will apply DeepPink
to the first, second, fourth, and sixth <p>
elements.
<article>
<h1>Article's first heading 1 element</h1>
<p>Article's first paragraph element</p>
<h2>Article's first heading 2 element</h2>
<p>Article's second paragraph element</p>
<p>Article's third paragraph element</p>
<section>
<h3>Article's first heading 3 element</h3>
<p>Article's fourth paragraph element</p>
<p>Article's fifth paragraph element</p>
</section>
<h2>Article's second heading 2 element</h2>
<p>Article's sixth paragraph element</p>
<p>Article's seventh paragraph element</p>
</article>
Apply DeepPink to the third child element, seventh, eleventh and so on that is a <p>
node
The :nth-child()
selector below selects every <p>
child element whose index is a multiple of two (2
) with an offset of three (+3
).
1
is the index of the first child element.
p:nth-child(2n + 3) {
color: DeepPink;
}
Fun Quiz: If the snippet below is the HTML document for the above CSS ruleset, which elements will the browser style?
<p>First paragraph element</p>
<p>Second paragraph element</p>
<p>Third paragraph element</p>
<p>Fourth paragraph element</p>
<div><p>Fifth paragraph element</p></div>
<p>Sixth paragraph element</p>
<p>Seventh paragraph element</p>
<p>Eight paragraph element</p>
<div><p>Nineth paragraph element</p></div>
<p>Tenth paragraph element</p>
<p>Eleventh paragraph element</p>
<p>Twelfth paragraph element</p>
Master NPM Package Creation
Apply DeepPink to the first child, third, fifth, and so on that is a <p>
node
The :nth-child()
selector below selects every <p>
child element whose index is a multiple of two (2
) with an offset of negative three (-3
).
1
is the index of the first child element.
p:nth-child(2n-3) {
color: DeepPink;
}
Fun Quiz: If the snippet below is the HTML document for the above CSS ruleset, which elements will the browser style?
<p>First paragraph element</p>
<p>Second paragraph element</p>
<p>Third paragraph element</p>
<p>Fourth paragraph element</p>
<div><p>Fifth paragraph element</p></div>
<p>Sixth paragraph element</p>
<p>Seventh paragraph element</p>
<p>Eight paragraph element</p>
<div><p>Nineth paragraph element</p></div>
<p>Tenth paragraph element</p>
<p>Eleventh paragraph element</p>
<p>Twelfth paragraph element</p>
Apply DeepPink to the <p>
nodes that are one of the first three children of their parent
The :nth-child()
selector below applies DeepPink
to the <p>
nodes that are one of their parent's first three elements.
p:nth-child(-n + 3) {
color: DeepPink;
}
Fun Quiz: If the snippet below is the HTML document for the above CSS ruleset, which elements will the browser style?
<article>
<h1>Article's first heading 1 element</h1>
<p>Article's first paragraph element</p>
<h2>Article's first heading 2 element</h2>
<p>Article's second paragraph element</p>
<p>Article's third paragraph element</p>
<section>
<h3>Article's first heading 3 element</h3>
<p>Article's fourth paragraph element</p>
<p>Article's fifth paragraph element</p>
</section>
<h2>Article's second heading 2 element</h2>
<p>Article's sixth paragraph element</p>
<p>Article's seventh paragraph element</p>
</article>
1
is the index position of the first child element.- The
-n+3
syntax always selects the first three<p>
child elements because:-1 + 3 = 2
-2 + 3 = 1
-3 + 3 = 0
:nth-child()
vs. :nth-of-type()
– What's the Difference?
:nth-child()
selects items from a general group of elements. For instance, selecting a <p>
node from a mixed group that includes <h1>
, <div>
, and <section>
.
:nth-of-type()
selects items from a specified group of elements. For instance, selecting a <p>
node from a group of <p>
siblings.
Other similar pseudo-class selectors are:
:first-child
:first-of-type
:last-child
:last-of-type
:nth-last-child()
:nth-last-of-type()
:only-of-type
Overview
This article discussed what the CSS :nth-child()
pseudo-class selector is. We also used examples to see how it works.
Your support matters: Buy me a coffee to support CodeSweetly's mission of simplifying coding concepts.
Tweet this article