25704 2014-05-14 08:04:45 +0000 "When an element's id attribute is removed, unse..." 2014-05-14 13:11:19 +0000 1 1 1 Unclassified WebAppsWG DOM unspecified PC All RESOLVED FIXED P2 normal --- 1 zcorpan annevk crimsteam mike www-dom public-webapps-bugzilla oldest_to_newest 105944 0 zcorpan 2014-05-14 08:04:45 +0000 http://dom.spec.whatwg.org/#interface-element [[ When an element's id attribute is removed, unset the element's ID. ]] ...or when it is set to the empty string? 105948 1 crimsteam 2014-05-14 09:55:28 +0000 Set to empty string not removed id attribute. <script type = "text/javascript"> var el = document.createElement("div"); 　alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // false el.id = "test"; alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // true el.id = ""; alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // true </script> But this looks strange: "Either when an element is created that has an id attribute whose value is not the empty string or when an element's id attribute is set to a value other than the empty string, set the element's ID to the new value." <script type = "text/javascript"> var el = document.createElement("div"); 　alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // false el.id = ""; el.setAttribute("id", ""); alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // true </script> Or maybe create/remove has some other meaning? 105949 2 crimsteam 2014-05-14 10:10:31 +0000 And another case: <p id=""></p> <script type = "text/javascript"> alert(document.getElementById("")); // null var el = document.getElementsByTagName("p")[0]; 　alert(el.getAttribute("id")); alert(el.id); alert(el.hasAttribute("id")); // true </script> 105950 3 annevk 2014-05-14 11:17:36 +0000 https://github.com/whatwg/dom/commit/967552c81e1912a6ace72050a3a68a257c1ff672 105966 4 zcorpan 2014-05-14 13:08:55 +0000 spiritRKS1910 it seems you confuse the attribute with the "ID" concept. <p id=""> has an "id" attribute but does not have an ID. 105967 5 crimsteam 2014-05-14 13:11:19 +0000 Yup, I realize about it after submit this examples, but thx for answer, good catch.