The best HTML attribute in the world!
  1. Welcome
  2. iframe
  3. YouTube
  4. Examples
  5. Warnings
  6. Errors
  7. Anecdotes
  8. Questions (11)


"allowfullscreen" is not a member of a group specified for any attribute.

Invalid error: Attribute allowfullscreen not allowed on element iframe at this point

There is no attribute "allowfullscreen".