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Introduction Of HTML5

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What is HTML?


HTML is a markup language for describing web documents (web pages).


  1. HTML stands for Hyper Text Markup Language
  2. A markup language is a set of markup tags
  3. HTML documents are described by HTML tags
  4. Each HTML tag describes different document content
A small HTML Document


<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>

<h1>My First Heading</h1>
<p>My first paragraph.</p>

</body>
</html>

Example Explained

  1. The DOCTYPE declaration defines the document type to be HTML
  2. The text between <html> and </html> describes an HTML document
  3. The text between <head> and </head> provides information about the document
  4. The text between <title> and </title> provides a title for the document
  5. The text between <body> and </body> describes the visible page content
  6. The text between <h1> and </h1> describes a heading
  7. The text between <p> and </p> describes a paragraph
Using this description, a web browser can display a document with a heading and a paragraph.

HTML tags

HTML tags are keywords (tag names) surrounded by angle brackets:

<tagname>content</tagname>

  1. HTML tags normally come in pairs like <p> and </p>
  2. The first tag in a pair is the start tag, the second tag is the end tag
  3. The end tag is written like the start tag, but with a slash before the tag name


Web Browser

The purpose of a web browser (Chrome, IE, Firefox, Safari) is to read HTML documents & display them.
The browser does not display the HTML tags, but makes use of them to select how to display the document:

Introduction Of HTML5
Introduction Of HTML5

The <!DOCTYPE> Declaration


The <!DOCTYPE> declaration helps the browser to display a web page correctly.

There's different document types on the net.

To display a document correctly, the browser must know both type & version.

The doctype declaration is not case sensitive. All cases are acceptable:

<!DOCTYPE html>

<!DOCTYPE HTML>

<!doctype html>

<!Doctype Html>

HTML VERIONS

Since the early days of the web, there have been many versions of HTML:


Version                    Year
HTML                      1991
HTML 2.0              1995
HTML 3.2              1997
HTML 4.01              1999
XHTML                      2000
HTML5                      2014



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