THE HTML LEARNING LIBRARY

Knowledge checks

Check your understanding and learn why an answer is correct.

5 resources to explore

5 on this page

Quiz01

Document structure knowledge check

Review standards mode, document metadata, language, and main landmarks.

Beginner2 min read

Quiz02

Check labels, submission keys, boolean constraints, and the limits of browser validation.

Beginner2 min read

Quiz03

Explain source versus DOM, iframe origins, script isolation, and the boundary between browser checks and server trust.

Advanced2 min read

Quiz04

Review labels, successful controls, submission APIs, native disclosure behavior, and the limits of ARIA.

Advanced2 min read

Quiz05

Choose between art direction and resolution selection, then reason about dimensions, alternatives, captions, and loading.

Advanced2 min read