HTML5

HTML5 defines the fifth major revision of the core language of the World Wide Web, HTML.

HTML Design Principles

1. Compatibility

• Support existing content
• Degrade gracefully
• Do not reinvent the wheel
• Pave the cowpaths
• Evolution not revolution

1. Utility

• Solve real problems
• Priority of constituencies
• Secure by design
• Separation of concerns
• DOM consistency

1. Interoperability

• Well-defined behavior
• Avoid needless complexity
• Handle errors