html-introduction

HTML Introduction

What is HTML?

  • HTML stands for Hyper Text Markup Language
  • HTML is the standard markup language for creating Web pages
  • HTML describes the structure of a Web page
  • HTML consists of a series of elements
  • HTML elements tell the browser how to display the content
  • HTML elements label pieces of content such as “this is a heading”, “this is a paragraph”, “this is a link”, etc.

A Simple HTML Document

Example

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

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

</body>
</html>

Example Explained

  • The <!DOCTYPE html> declaration characterizes that this archive is a HTML5 record
  • The <html> element is the root component of a HTML page
  • The <head> element contains meta information about the HTML page
  • The <title> element indicates a title for the HTML page (which is appeared in the program’s title bar or in the page’s tab)
  • The <body> element characterizes the archive’s body, and is a compartment for all the obvious substance, for example, headings, sections, pictures, hyperlinks, tables, records, and so on
  • The <h1> element characterizes a huge heading
  • The <p> element characterizes a passage
  • What is an HTML Element?

An HTML element is defined by a start tag, some content, and an end tag:

<tagname>Content goes here…</tagname>

The HTML element is everything from the start tag to the end tag:

<h1>My First Heading</h1>
<p>My first paragraph.</p>
Start tagElement contentEnd tag
<h1>My First Heading</h1>
<p>My first paragraph.</p>
<br>nonenone

Note: Some HTML elements have no content (like the <br> element). These elements are called empty elements. Empty elements do not have an end tag!

Web Browsers

The purpose of a web browser (Chrome, Edge, Firefox, Safari) is to read HTML documents and display them correctly.

A browser does not display the HTML tags, but uses them to determine how to display the document:

View in Browser

HTML Page Structure

Below is a visualization of an HTML page structure:

<html>

<head>

<title>Page title</title>

</head>

<body>

<h1>This is a heading</h1>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>

</body>

</html>

Note: The content inside the <body> section (the white area above) will be displayed in a browser. The content inside the <title> element will be shown in the browser’s title bar or in the page’s tab.

HTML History

Since the early days of the World Wide Web, there have been many versions of HTML:

YearVersion
1989Tim Berners-Lee invented www
1991Tim Berners-Lee invented HTML
1993Dave Raggett drafted HTML+
1995HTML Working Group defined HTML 2.0
1997W3C Recommendation: HTML 3.2
1999W3C Recommendation: HTML 4.01
2000W3C Recommendation: XHTML 1.0
2008WHATWG HTML5 First Public Draft
2012WHATWG HTML5 Living Standard
2014W3C Recommendation: HTML5
2016W3C Candidate Recommendation: HTML 5.1
2017W3C Recommendation: HTML5.1 2nd Edition
2017W3C Recommendation: HTML5.2