1. The HTML details element

    I did not know the HTML element <details>, but this looks like a smart way to use it.

    You could use it for a page with answers to frequently asked questions:

    What's up?

    This would contain the complete answer that explains what the one and only correct answer to question would be.

    In this case it would not that simple, mainly because the question itself is quite vague. Normally, the question would be more specific. But since this is just an example, the actual content does not really matter that much. It just has to show how the HTML element works.

    Another use is for an outline of some kind, like a todo list:

    Build site
    Collect requirements
    Create the design
    Visual ontwerp
    Interaction
    Test the design
    Scan for usability problems
    Perfom user test
    Process test results
    Create technical design
    Frontend
    Select components
    Backend
    Select components
    Create data model
    ... etc.