HTML and CSS Reference
In-Depth Information
Listing 2-5.
HTML Source Code for Hello World!
<!DOCTYPE html>
<html lang="en-GB" dir="ltr">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width; initial-scale=1.0;
maximum-scale=1.0; user-scalable=0; target-densitydpi=device-dpi;"/>
<title>My First Mobile Web App</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
If you are not familiar with some of the HTML elements shown in Listing 2-5, the
first line is the new HTML5 doctype. In HTML5, you do not need to specify a
DTD, which can usually be found in XHTML 1.1 pages. Listing 2-6 shows the
difference between an XHTML 1.1 doctype declaration and an HTML5 doctype
declaration.
Listing 2-6.
The Difference Between an XHTML 1.1 Doctype Declaration and an HTML5 Doctype
Declaration
<!-- HTML4 Doctype Decleration -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
<!-- HTML5 Doctype Decleration -->
<!DOCTYPE html>
As you can see, there is now no need to Google or memorize the location of the
DTD path or specify the HTML version.
In the HTML tag, I have added two attributes:
<html lang="en-GB" dir="ltr">.
lang
will specify the language used within the document, and
dir
dictates the
reading direction.
dir
has been set to
ltr
for left to right, and
lang
has been set
to
en-GB
for English - Great Britian.
Proceeding to the head element, there are two meta tags, as shown in
Listing 2-7.
