HTML 5 Specification

Published 2014-10-28 |

HTML5 is the next major revision of the HTML standard, currently under development. Like its immediate predecessors, HTML 4.01 and XHTML 1.1, HTML5 is a standard for structuring and presenting Internet content.

HTML and XHTML comprise a mixture of features introduced by various specifications, including those introduced by software products such as web browsers and those established by common practice. HTML5 is a single markup language that can be written in either HTML or XHTML syntax. It includes detailed processing models to encourage more interoperable implementations. It extends and improves the markup available for documents and introduces markup and APIs for complex web applications.

Most of the new features of HTML5 are supported by common browsers such as Mozilla Firefox, Google Chrome, Internet Explorer, Opera and mobile browsers.

HTML5 supports:

• All the form controls from HTML 4. All applications working on HTML4 work on HTML5.
• New input controls such as:
  • Sliders and date pickers.
  • Email, which looks just like a text box, but can be customized. For example, but mobile browsers can customize their onscreen keyboard to make it easier to type e-mail addresses. In older browsers that do not support the email, the input type is treated as a regular text field and the form works without requiring markup changes or scripting hacks.

<canvas id="example" width="200" height="200">
    This text is displayed if your browser does NOT support HTML5 canvas.
</canvas>

var example = document.getElementById('example');
var context = example.getContext('2d');
    context.fillStyle = "rgb(255,0,0)";
    context.fillRect(30, 30, 50, 50);

<audio src="example-sound.mp4">
    Your browser does NOT support the audio element.
</audio>

<video src="movie.mp4" width="320" height="240">
    Your browser does not support the video tag.
</video>