What are the differences between html4 and html5?

The main differences between HTML4 and HTML5 are features and compatibility: Feature differences: HTML5 introduces semantic elements, multimedia support, canvas, geolocation, and web storage. Compatibility differences: HTML5 has wider browser support, is specifically optimized for mobile devices, and provides more robust error handling and higher performance.

The difference between HTML4 and HTML5

HTML4 and HTML5 are both markup languages ​​used to create web pages, but they There are significant differences in features, compatibility, and other aspects.

Feature differences:

• ## Semantic elements: HTML5 introduces semantic elements, such as
  ,

  and

  , to help better define the structure of the page.
• Multimedia: HTML5 provides native support for video and audio without relying on external plug-ins.
• Canvas and SVG: HTML5 adds the and elements, allowing the creation of complex graphics and animations.
• Geolocation: HTML5 introduces the Geolocation API, allowing web pages to access the user's geolocation data.
• Web Storage: HTML5 provides web storage, allowing web pages to store data on the client side.

Compatibility differences:

• Browser support: HTML5 has wider browser support, including modern browsing server and older versions.
• Mobile devices: HTML5 is specially optimized for mobile devices, providing a better responsiveness and user experience.

Other differences:

• Document type declaration: HTML5 uses, while HTML4 uses .
• Character encoding: HTML5 uses UTF-8 character encoding by default, while HTML4 uses ASCII or ISO-8859-1.
• Error handling: HTML5 provides a more robust error handling mechanism to make web pages more fault-tolerant.
• Performance: HTML5 improves the performance of web pages by introducing asynchronous loading and caching mechanisms.

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