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The

<nav>

element is used to

contain the major navigational

blocks on the site such as the

primary site navigation.

Going back to our blog example,

if you wanted to ﬁnish an article

with links to related blog posts,

these would not be counted as

major navigational blocks and

therefore should not sit inside a

<nav>

element.

At the time of writing, some of

the developers that were already

using HTML5 decided to use the

<nav>

element for the links that

appear at the bottom of every

page (links to things like privacy

policy, terms and conditions

and accessibility information).

Whether this will be widely

adopted is still yet to be seen.

<nav>

<ul>

<li><a href="">classes</a></li>

<li><a href="">catering</a></li>

<li><a href="">about</a></li>

<li><a href="">contact</a></li>

</ul>

</nav>

chapter-17/example.html

HTML

navigaTion

<nav>

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435 HTML5 LAYOUT

</figure>

<h2>Japanese Vegetarian</h2>

<h3>Five week course in London</h3>

</hgroup>

<p>A five week introduction to traditional

Japanese vegetarian meals, teaching you a

selection of rice and noodle dishes.</p>

</article>

<img src="images/teriyaki.jpg"

alt="Teriyaki sauce" />

<figcaption>Teriyaki Sauce</figcaption>

</figure>

<h2>Sauces Masterclass</h2>

<h3>One day workshop</h3>

</hgroup>

<p>An intensive one-day course looking at how to

create the most delicious sauces for use in a

range of Japanese cookery.</p>

</article>

chapter-17/example.html

HTML

The

element acts as

a container for any section of a

page that could stand alone and

potentially be syndicated.

This could be an individual

article or blog entry, a comment

or forum post, or any other

independent piece of content.

If a page contains several articles

(or even summaries of several

articles), then each individual

article would live inside its own

element.

The

elements can

even be nested inside each

other. For example, a blog post

might live inside one

element and each comment on

the article could live inside its

own child

element.

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HTML5 LAYOUT

The

<aside>

element has two

purposes, depending on whether

it is inside an

element or not.

When the

<aside>

element

is used inside an

element, it should contain

information that is related to the

article but not essential to its

overall meaning. For example, a

pullquote or glossary might be

considered as an aside to the

article it relates to.

When the

<aside>

element is

used outside of an

element, it acts as a container

for content that is related to

the entire page. For example,

it might contain links to other

sections of the site, a list of

latest news, top products, and

newsletter signup.

Because the

element

groups related items together,

it may contain several distinct

elements that have a

common theme or purpose.

Alternatively, if you have a

page with a long article, the

element can be

used to split the article up into

separate sections.

The

element should

not be used as a wrapper for

the entire page (unless the

page only contains one distinct

piece of content). If you want a

containing element for the entire

page, that job is still best left to

the

<div>

element.

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HTML5 LAYOUT

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HTML5 LAYOUT

The purpose of the

element is to group together a

set of one or more

<h1>

through

<h6>

elements so that they are

treated as one single heading.

For example, the

element could be used to contain

both a title inside an

<h2>

element and a subtitle within an

<h3>

element.

This element has had a mixed

reception. When it was ﬁrst

proposed by the people

developing HTML5, there were

some complaints and it was

withdrawn from the HTML5

proposals. However, some

people changed their minds and

it has been added it back into the

language. Some developers do

not like the use of the

element, and prefer to place a

subtitle inside a

<p>

element

(using an attribute to indicate

that it is a subheading).

Some suggest that it is of little

use other than as a styling hook.

It has, however, been popular

with those developers who

believe that it is useful to group

together the primary heading

and the subheading (as both can

be integral parts of a heading).

<h2>Japanese Vegetarian</h2>

<h3>Five week course in London</h3>

</hgroup>

chapter-17/example.html

HTML

Heading groups

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439 HTML5 LAYOUT

</figure>

chapter-17/example.html

HTML

You already met the

element in Chapter 5 when we

looked at images. It can be used

to contain any content that is

referenced from the main ﬂow of

an article (not just images).

It is important to note that the

article should still make sense

if the content of the

element were moved (to another

part of the page, or even to a

different page altogether).

For this reason, it should only be

used when the content simply

references the element (and not

for something that is absolutely

integral to the ﬂow of a page).

Examples of usage include:

Images

●

Videos

●

Graphs

●

Diagrams

●

Code samples

●

Text that supports the main

●

body of an article

The

element should

also contain a

element which provides a text

decription for the content of

the

element. In

this example, you can see a

has been added inside

the

element.

Figures

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HTML5 LAYOUT

<h1>Yoko's Kitchen</h1>

<nav>

</nav>

</header>

</section>

<aside>

</aside>

</footer>

</div>

chapter-17/example.html

HTML

It may seem strange to follow

these new elements by revisiting

the

<div>

element again. (After

all, the new elements are often

going to be used in its place.)

However, the

<div>

element

will remain an important way to

group together related elements,

because you should not be using

these new elements that you

have just met for purposes other

than those explicitly stated.

Where there is no suitable

element to group a set of

elements, the

<div>

element will

still be used. In this example, it is

used as a wrapper for the entire

page.

Some people have asked why

there is no

element

to contain the main part of

a page. The reason is that

anything that lies outside of the

<aside>

elements can be considered as

the main content.

secTioning eLeMenTs

<div>

441 HTML5 LAYOUT

<img src="images/bok-choi.jpg"

alt="Bok Choi" />

</figure>

<h2>Japanese Vegetarian</h2>

<h3>Five week course in London</h3>

</hgroup>

<p>A five week introduction to traditional

Japanese vegetarian meals, teaching you a

selection of rice and noodle dishes.</p>

</article>

</a>

chapter-17/example.html

HTML

HTML5 allows web page authors

to place an

<a>

element around

a block level element that

contains child elements. This

allows you to turn an entire block

into a link.

This is not a new element in

HTML5, but it was not seen as a

correct usage of the

<a>

element

in earlier versions of HTML.

Linking around

BLock-LeveL eLeMenTs

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HTML5 LAYOUT

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HTML5 LAYOUT

Older browsers that do not

know the new HTML5 elements

will automatically treat them as

inline elements. Therefore, to

help older browsers, you should

include the line of CSS on the

left which states which new

elements should be rendered as

block-level elements.

Also, IE9 was the ﬁrst version of

Internet Explorer to allow CSS

rules to be associated with these

new HTML5 layout elements.

In order to style these elements

using earlier versions of IE, you

need to use a simple JavaScript

known as the HTML5 shiv or

HTML5 shim.

You do not need to understand

JavaScript to use it. You can

just link to a copy that Google

hosts on its servers. It should

be placed inside a conditional

comment which checks if the

browser version is less than

(hence the

) IE9.

Unfortunately, this workaround

does require that anyone using

IE8 or earlier versions of IE

has JavaScript enabled in their

browser. If they do not have

JavaScript enabled then they will

not be able to see the content of

these HTML5 elements.

header, section, footer, aside, nav, article, figure

{

display: block;}

chapter-17/example.html

CSS

HeLping oLder

Browsers undersTand

<!--[if lt IE 9]>

trunk/html5.js"></script>

<![endif]-->

chapter-17/example.html

HTML

443 HTML5 LAYOUT

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