16919 2012-05-03 14:25:49 +0000 Make element traversal members available on more nodes 2012-11-27 18:40:55 +0000 1 1 1 Unclassified WebAppsWG DOM unspecified PC All RESOLVED FIXED P2 normal --- 1 zcorpan annevk bugs erik.arvidsson jonas mike mtanalin www-dom public-webapps-bugzilla oldest_to_newest 67289 0 zcorpan 2012-05-03 14:25:49 +0000 If you have foo and want the next element sibling, it makes sense to just use nextElementSibling even if foo is not an element. Currently nextElementSibling is only defined on Element. The same argument goes for the other element traversal members. Specifically, I think the following makes sense: children firstElementChild lastElementChild childElementCount on Document, DocumentFragment, Element previousElementSibling nextElementSibling on DocumentType, Element, CharacterData I think this is similar to the new mutation methods (prepend() et al). 67292 1 mtanalin 2012-05-03 15:38:51 +0000 Reasonable. 78135 2 erik.arvidsson 2012-11-09 17:19:33 +0000 Wouldn't previousElementSibling and nextElementSibling be useful on Node too? 78136 3 annevk 2012-11-09 17:27:48 +0000 Node - (DocumentType, Element, CharacterData) = (Document, DocumentFragment), so probably not? 78137 4 annevk 2012-11-09 17:28:05 +0000 But it sounds like in general you think this is a good idea? 78138 5 erik.arvidsson 2012-11-09 18:00:26 +0000 (In reply to comment #4) > But it sounds like in general you think this is a good idea? Yes. It sounds like an improvement. The reason why I think nextElementSibling makes sense for all Nodes is that it would give the next sibling node that is an Element. Conceptually nextElementSibling is just: Object.defineProperty(Node.prototype, 'nextElementSibling', { get: function() { for (var next = this.nextSibling; next && next.nodeType !== Node.ELEMENT_NODE; next = next.nextSibling); return next; }, ... }); 78139 6 annevk 2012-11-09 18:23:22 +0000 Maybe comment 3 was too cryptic. Simon is proposing to put previousElementSibling and nextElementSibling on all nodes, except for Document and DocumentFragment, where they are never useful, I think. 78937 7 annevk 2012-11-27 18:40:55 +0000 https://github.com/whatwg/dom/commit/4522273382af5950d19154e5bfa74d2ab8566033