The special relationship between your HTML markup and browsers is one more interesting than you'd think. In this session we'll cover pedantic differences like "elements" vs "tags" but also get into what it means that HTML is both markup and a serialization but definitely not the DOM. You'll also learn shortcuts with HTML that save you time. In the end, you'll have a better understanding of how browsers handle your work.
Mothereffing unquoted attribute value validator: mothereffingunquotedattributes.com