Hi, In HTML fragment serialization algorithm, we skip elements with empty content model in step 2.2: If current node is an area<http://www.whatwg.org/specs/web-apps/current-work/multipage/the-map-element.html#the-area-element> , base<http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#the-base-element> , basefont<http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#basefont> , bgsound<http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#bgsound> , br<http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-br-element> , col<http://www.whatwg.org/specs/web-apps/current-work/multipage/tabular-data.html#the-col-element> , embed<http://www.whatwg.org/specs/web-apps/current-work/multipage/the-iframe-element.html#the-embed-element> , frame<http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#frame> , hr<http://www.whatwg.org/specs/web-apps/current-work/multipage/grouping-content.html#the-hr-element> , img<http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content-1.html#the-img-element> , input<http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#the-input-element> , keygen<http://www.whatwg.org/specs/web-apps/current-work/multipage/the-button-element.html#the-keygen-element> , link<http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#the-link-element> , meta<http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#meta> , param<http://www.whatwg.org/specs/web-apps/current-work/multipage/the-iframe-element.html#the-param-element>, or wbr<http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-wbr-element>element, then continue on to the next child node at this point.
For consistency, I propose to skip children of source and track elements as well. Also, the algorithm does not seem to specify the behavior on deprecated (or undocumented) elements such as isindex. Can we assume that the serialization of such elements are UA-defined? Best, Ryosuke Niwa Software Engineer rn...@webkit.org
