Diff of HTMLs

Unofficial diff viewer for WHATWG HTML Standard and W3C HTML 5.1. The Diff of HTMLs provides differences of each section between the specifications.

Table of contents (TOCs) of the HTML specifications

Note: This site modifies TOCs to reduce unnecessary diffs. The following TOCs are not equal to the specifications. More info.

All of diffs are generated from WHATWG HTML Standard and W3C HTML 5.1 retrieved at 2016-2-6 6:56:29 UTC.

1. Introduction
   1. Where does this specification fit?
   2. Is this HTML5?
   3. Background
   4. Audience
   5. Scope
   6. History
   7. Design notes
   8. HTML vs XHTML
   9. Structure of this specification
   10. Privacy concerns
   11. A quick introduction to HTML
   12. Conformance requirements for authors
   13. Suggested reading
2. Common infrastructure
   1. Terminology
      1. (preface)
      2. Resources
      3. XML
      4. DOM trees
      5. Scripting
      6. Plugins
      7. Character encodings
   2. Conformance requirements
      1. (preface)
      2. Conformance classes
      3. Dependencies
      4. Extensibility
      5. Interactions with XPath and XSLT
   3. Case-sensitivity and string comparison
   4. Common microsyntaxes
      1. (preface)
      2. Common parser idioms
      3. Boolean attributes
      4. Keywords and enumerated attributes
      5. Numbers
      6. Dates and times
      7. Colours
      8. Space-separated tokens
      9. Comma-separated tokens
      10. References
      11. Media queries
   5. URLs
      1. Terminology
      2. Resolving URLs
      3. Dynamic changes to base URLs
   6. Fetching resources
      1. Terminology
      2. Processing model
      3. Encrypted HTTP and related security concerns
      4. Determining the type of a resource
      5. Extracting character encodings from meta elements
      6. CORS settings attributes
   7. Common DOM interfaces
      1. Reflecting content attributes in IDL attributes
      2. Collections
      3. The DOMStringMap interface
      4. The DOMElementMap interface
      5. Transferable objects
      6. Safe passing of structured data
      7. Garbage collection
   8. Namespaces
3. Semantics, structure, and APIs of HTML documents
   1. Documents
      1. (preface)
      2. The Document object
      3. Resource metadata management
      4. DOM tree accessors
      5. Loading XML documents
   2. Elements
      1. Semantics
      2. Elements in the DOM
      3. Element definitions
      4. Content models
      5. Global attributes
      6. Requirements relating to the bidirectional algorithm
      7. Requirements related to ARIA and to platform accessibility APIs
      8. WAI-ARIA
4. The elements of HTML
   1. The root element
      1. The html element
   2. Document metadata
      1. The head element
      2. The title element
      3. The base element
      4. The link element
      5. The meta element
      6. The style element
      7. Interactions of styling and scripting
   3. Sections
      1. The body element
      2. The article element
      3. The section element
      4. The nav element
      5. The aside element
      6. The h1, h2, h3, h4, h5, and h6 elements
      7. The hgroup element
      8. The header element
      9. The footer element
      10. The address element
      11. Headings and sections
      12. Usage summary
   4. Grouping content
      1. The p element
      2. The hr element
      3. The pre element
      4. The blockquote element
      5. The ol element
      6. The ul element
      7. The li element
      8. The dl element
      9. The dt element
      10. The dd element
      11. The figure element
      12. The figcaption element
      13. The main element
      14. The div element
   5. Text-level semantics
      1. The a element
      2. The em element
      3. The strong element
      4. The small element
      5. The s element
      6. The cite element
      7. The q element
      8. The dfn element
      9. The abbr element
      10. The ruby element
      11. The rb element
      12. The rt element
      13. The rtc element
      14. The rp element
      15. The data element
      16. The time element
      17. The code element
      18. The var element
      19. The samp element
      20. The kbd element
      21. The sub and sup elements
      22. The i element
      23. The b element
      24. The u element
      25. The mark element
      26. The bdi element
      27. The bdo element
      28. The span element
      29. The br element
      30. The wbr element
      31. Usage summary
   6. Links
      1. Introduction
      2. (preface)
      3. Links created by a and area elements
      4. API for a and area elements
      5. Following hyperlinks
      6. Downloading resources
      7. Link types
   7. Edits
      1. (preface)
      2. The ins element
      3. The del element
      4. Attributes common to ins and del elements
      5. Edits and paragraphs
      6. Edits and lists
      7. Edits and tables
   8. Embedded content
      1. Introduction
      2. Dependencies
      3. The picture element
      4. The source element when used with the picture element
      5. The img element
      6. The iframe element
      7. The embed element
      8. The object element
      9. The param element
      10. The video element
      11. The audio element
      12. The source element
      13. The track element
      14. Media elements
      15. The map element
      16. The area element
      17. Image maps
      18. MathML
      19. SVG
      20. Dimension attributes
   9. Tabular data
      1. The table element
      2. The caption element
      3. The colgroup element
      4. The col element
      5. The tbody element
      6. The thead element
      7. The tfoot element
      8. The tr element
      9. The td element
      10. The th element
      11. Attributes common to td and th elements
      12. Processing model
      13. Table sorting model
      14. Examples
   10. Forms
       1. Introduction
       2. Categories
       3. The form element
       4. The label element
       5. The input element
       6. The button element
       7. The select element
       8. The datalist element
       9. The optgroup element
       10. The option element
       11. The textarea element
       12. The keygen element
       13. The output element
       14. The progress element
       15. The meter element
       16. The fieldset element
       17. The legend element
       18. Form control infrastructure
       19. Attributes common to form controls
       20. APIs for the text field selections
       21. Constraints
       22. Form submission
       23. Resetting a form
   11. Interactive elements
       1. The details element
       2. The summary element
       3. The menu element
       4. The menuitem element
       5. Context menus
       6. Commands
       7. The dialog element
   12. Scripting
       1. (preface)
       2. The script element
       3. The noscript element
       4. The template element
       5. The canvas element
   13. Common idioms without dedicated elements
       1. The main part of the content
       2. Subheadings, subtitles, alternative titles and taglines
       3. Bread crumb navigation
       4. Tag clouds
       5. Conversations
       6. Footnotes
   14. Disabled elements
   15. Matching HTML elements using selectors
       1. Case-sensitivity
       2. Pseudo-classes
5. Microdata
   1. Introduction
   2. Encoding microdata
   3. Sample microdata vocabularies
   4. Converting HTML to other formats
6. User interaction
   1. The hidden attribute
   2. Inert subtrees
   3. Activation
   4. Focus
      1. Introduction
      2. Data model
      3. The tabindex attribute
      4. Processing model
      5. Sequential focus navigation
      6. Focus management APIs
   5. Assigning keyboard shortcuts
      1. Introduction
      2. The accesskey attribute
      3. Processing model
   6. Editing
      1. Making document regions editable: The contenteditable content attribute
      2. Making entire documents editable: The designMode IDL attribute
      3. Best practices for in-page editors
      4. Editing APIs
      5. Spelling and grammar checking
   7. Drag and drop
      1. (preface)
      2. Introduction
      3. The drag data store
      4. The DataTransfer interface
      5. The DragEvent interface
      6. Drag-and-drop processing model
      7. Events summary
      8. The draggable attribute
      9. The dropzone attribute
      10. Security risks in the drag-and-drop model
7. Loading Web pages
   1. (preface)
   2. Browsing contexts
      1. (preface)
      2. Nested browsing contexts
      3. Auxiliary browsing contexts
      4. Secondary browsing contexts
      5. Security
      6. Groupings of browsing contexts
      7. Browsing context names
      8. Script settings for browsing contexts
   3. The Window object
      1. (preface)
      2. Security
      3. APIs for creating and navigating browsing contexts by name
      4. Accessing other browsing contexts
      5. Named access on the Window object
      6. Garbage collection and browsing contexts
      7. Closing browsing contexts
      8. Browser interface elements
      9. The WindowProxy object
   4. Origin
      1. (preface)
      2. Relaxing the same-origin restriction
   5. Sandboxing
   6. Session history and navigation
      1. The session history of browsing contexts
      2. The History interface
      3. The Location interface
      4. Implementation notes for session history
   7. Browsing the Web
      1. Navigating across documents
      2. Page load processing model for HTML files
      3. Page load processing model for XML files
      4. Page load processing model for text files
      5. Page load processing model for multipart/x-mixed-replace resources
      6. Page load processing model for media
      7. Page load processing model for content that uses plugins
      8. Page load processing model for inline content that doesn't have a DOM
      9. Navigating to a fragment identifier
      10. History traversal
      11. Unloading documents
      12. Aborting a document load
   8. Offline Web applications
      1. (preface)
      2. Introduction
      3. Application caches
      4. The cache manifest syntax
      5. Downloading or updating an application cache
      6. The application cache selection algorithm
      7. Changes to the networking model
      8. Expiring application caches
      9. Disk space
      10. Security concerns with offline applications caches
      11. Application cache API
      12. Browser state
8. Web application APIs
   1. Scripting
      1. Introduction
      2. Enabling and disabling scripting
      3. Processing model
      4. Event loops
      5. Events
   2. Base64 utility methods
   3. Dynamic markup insertion
      1. (preface)
      2. Opening the input stream
      3. Closing the input stream
      4. document.write()
      5. document.writeln()
   4. Timers
   5. User prompts
      1. Simple dialogs
      2. Printing
      3. Dialogs implemented using separate documents with showModalDialog()
   6. System state and capabilities
      1. The Navigator object
      2. The External interface
   7. Images
   8. Animation Frames
9. Communication
   1. The MessageEvent interfaces
   2. Server-sent events
   3. Web sockets
   4. Cross-document messaging
   5. Channel messaging
   6. Broadcasting to other browsing contexts
10. Web workers
    1. Introduction
    2. Infrastructure
    3. APIs available to workers
11. Web storage
    1. Introduction
    2. The API
    3. Disk space
    4. Privacy
    5. Security
12. The HTML syntax
    1. (preface)
    2. Writing HTML documents
       1. (preface)
       2. The DOCTYPE
       3. Elements
       4. Text
       5. Character references
       6. CDATA sections
       7. Comments
    3. Parsing HTML documents
       1. (preface)
       2. Overview of the parsing model
       3. The input byte stream
       4. Parse state
       5. Tokenization
       6. Tree construction
       7. The end
       8. Coercing an HTML DOM into an infoset
       9. An introduction to error handling and strange cases in the parser
    4. Serialising HTML fragments
    5. Parsing HTML fragments
    6. Named character references
13. The XHTML syntax
    1. (preface)
    2. Writing XHTML documents
    3. Parsing XHTML documents
    4. Serialising XHTML fragments
    5. Parsing XHTML fragments
14. Rendering
    1. (preface)
    2. Introduction
    3. The CSS user agent style sheet and presentational hints
    4. Non-replaced elements
    5. Replaced elements
    6. Bindings
    7. Frames and framesets
    8. Interactive media
    9. Print media
    10. Unstyled XML documents
15. Obsolete features
    1. Obsolete but conforming features
    2. Non-conforming features
    3. Requirements for implementations
16. IANA considerations
    1. text/html
    2. multipart/x-mixed-replace
    3. application/xhtml+xml
    4. application/x-www-form-urlencoded
    5. text/cache-manifest
    6. text/ping
    7. application/microdata+json
    8. `Ping-From`
    9. `Ping-To`
    10. web+ scheme prefix