Google HTML/CSS Style Guide – Omit Optional Tags
Maybe it will make more sense once it fully sinks in, but I think in general it is a mistake to make developers think about when and where certain things can be omitted. It's more straightforward to simply do one thing, consistently, following the "explicit is better than implicit" mantra.What happened to optimizing for mental overhead instead of file size? This simply should be a build step, part of your minification and concatenation dance, not having to consider all of these when trying to decide if I should close my  tag or not:A p element's end tag may be omitted if the p element is immediately followed by an address, article, aside, blockquote, details, div, dl, fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header, hgroup, hr, main, menu, nav, ol, p, pre, section, table, or ul element, or if there is no more content in the parent element and the parent element is an HTML element that is not an a, audio, del, ins, map, noscript, or video element, or an autonomous custom element.