HTML5 is a markup language for structuring and presenting content for the World Wide Web, and is a core technology of the Internet originally proposed by Opera Software. It is the fifth revision of the HTML standard and, as of September 2012, is still under development. Its core aims have been to improve the language with support for the latest multimedia while keeping it easily readable by humans and consistently understood by computers and devices
- The canvas element for immediate mode 2D drawing.
- Timed media playback
- Offline Web Applications
- Document editing
- Cross-document messaging
- Browser history management
- MIME type and protocol handler registration
- Web Storage, a key-value pair storage framework that provides behaviour similar to Cookies but with larger storage capacity and improved API.
Not all of the above technologies are included in the W3C HTML5 specification, though they are in the WHATWG HTML specification. Some related technologies, which are not part of either the W3C HTML5 or the WHATWG HTML specification, are as follows. The W3C publishes specifications for these separately:
- Web SQL Database, a local SQL Database (no longer maintained).
- The Indexed Database API, an indexed hierarchical key-value store (formerly WebSimpleDB).
- File API, handle file uploads and file manipulation.
- Directories and System. This API is intended to satisfy client-side-storage use cases not well served by databases.
- File Writer. An API for writing to files from web applications.
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