【實用教育app】HTML5 Free Guide|最夯免費app-綠色工廠好玩App

HTML is the language for describing the structure of Web pages. HTML stands for HyperText Markup Language. Web pages consist of markup tags and plain text. HTML is written in the form of HTML elements consisting of tags enclosed in angle brackets (like <html>). HTML tags most commonly come in pairs like <h1> and </h1>, although some tags represent empty elements and so are unpaired, for example <img>. The first tag in a pair is the start tag, and the second tag is the end tag (they are also called opening tags and closing tags).

HTML5 will soon be the standard for web pages and supported in the latest browsers. HTML5 will be the new standard for HTML, XHTML, and the HTML DOM. HTML5 is not something completely new. Most of HTML5 specifications came from HTML 4 or XHTML 1.0.

A web browser can read HTML files and compose them into visible or audible web pages. The browser does not display the HTML tags, but uses them to interpret the content of the page. HTML describes the structure of a website semantically along with cues for presentation, making it a markup language rather than a programming language.

What is New in HTML5?

Some of the new features in HTML5 are:

- The DOCTYPE declaration for HTML5 is very simple, <!DOCTYPE html>

- The character encoding (charset) declaration is also very simple, <meta charset="UTF-8">

- New Functions for embedding audio (<audio>), video (<video>), and graphics (<svg> and <canvas>)

- Client-side data storage

- Interactive documents

- New structural elements <article>, <header>, <footer>, <nav>, <section>, and <figure>

- New form controls calendar, date, time, email, url, search

- JavaScript enhancements

- New HTML5 API’s (Application Programming Interfaces). The most interesting new API’s are: HTML Geolocation, - HTML Drag and Drop, HTML Local Storage, HTML Application Cash, HTML Web Workers, HTML SSE

- HTML5 also includes new elements for better structure, drawing, media content, and better form handling.

HTML5 Browser Support

The latest versions of Apple Safari, Google Chrome, Mozilla Firefox, Opera, and Microsoft Internet Explorer 9.0 all support many of the new HTML5 features.

In addition, the mobile web browsers that come pre-installed on iPhones, iPads, and Android phones all have excellent support for HTML5.

Specific browsers supporting HTML5 are:

- IE 9+ (Windows)

- Firefox 3.0+ (all operating systems)

- Safari 3.0+ (Windows, OS X, and iPhone OS 1.0+ operating systems)

- Chrome 3.0.195+ (Windows), 5.0.375+ (all operating systems)

- Opera 9.5+ (all operating systems)