thead, tfoot and tbody order in HTML5

Question

I was reading in a forum about element that it must come after element. In contrast I saw some people use the order

Answer 1

According to the W3 specs, tfoot has to come before tbody. (Links to specs here -> Why do internal TABLE sections have to go THEAD TFOOT TBODY to validate?)

This was done to allow the header and footer of a table to load first, before loading in a variable amount of body data, which would otherwise possibly block the loading of the table footer.