Showing posts with label HTML Introduction. Show all posts
Showing posts with label HTML Introduction. Show all posts

Saturday, August 11, 2012

HTML Introduction

<!DOCTYPE html>

<h1>My First Heading</h1>

<p>My first paragraph.</p>

Example Explained
  • The DOCTYPE declaration defines the document type
  • The text between <html> and </html> describes the web page
  • The text between <body> and </body> is the visible page content
  • The text between <h1> and </h1> is displayed as a heading
  • The text between <p> and </p> is displayed as a paragraph
The <!DOCTYPE html> declaration is the syntax for the latest generation HTML - HTML5.

What is HTML?
HTML is a language for describing web pages.
  • HTML stands for Hyper Text Markup Language
  • HTML is not a programming language, it is a markup language
  • A markup language is a set of markup tags
  • The purpose of the tags are to describe page content

HTML markup tags are usually called HTML tags
  • HTML tags are keywords (tag names) surrounded by angle brackets like <html>
  • HTML tags normally come in pairs like <b> and </b>
  • The first tag in a pair is the start tag, the second tag is the end tag
  • The end tag is written like the start tag, with a forward slash before the tag name
  • Start and end tags are also called opening tags and closing tags

HTML Elements
"HTML tags" and "HTML elements" are often used to describe the same thing.
But strictly speaking, an HTML element is everything between the start tag and the end tag, including the tags:
HTML Element:
<p>This is a paragraph.</p>

HTML Documents = Web Pages
  • HTML documents describe web pages
  • HTML documents contain HTML tags and plain text
  • HTML documents are also called web pages

Web Browsers
The purpose of a web browser (Chrome, Internet Explorer, Firefox) is to read HTML documents and display them as web pages. The browser does not display the HTML tags, but uses the tags to interpret the content of the page:

HTML Page Structure
Below is a visualization of an HTML page structure:
<h1>This a Heading</h1>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>