I had an intro web development workshop. First session was only about HTML. I learnt 3 things I did not know about HTML:<p>1. Footers don't necessarily have to appear at the end of a section, though they usually do [0]<p>2. A head element's start tag can be omitted if the element is empty, or if the first thing inside the head element is an element. A head element's end tag can be omitted if the head element is not immediately followed by ASCII whitespace or a comment [1]<p>3. Self-closing tags (<tag />) do not exist in HTML [2]<p>Please let me know if you know something else.<p>[0], [1] whatwg.org
[2] developer.mozilla.org