Bug 110810 – Node::compareDocumentPosition returns DOCUMENT_POSITION_DISCONNECTED for elements in different ShadowRoots

• Status: NEW
• Component: DOM

[Elliott Sprehn]

var a = document.createElement('div');
var b = document.createElement('div');
var c = document.createElement('div');

document.body.appendChild(a);
document.body.appendChild(b);
b.webkitCreateShadowRoot().appendChild(c);

a.compareDocumentPosition(c);
// == Node.DOCUMENT_POSITION_DISCONNECTED | Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC

This shouldn't be implementation specific, we need the spec to be clear of the node order for two things in different shadow (or the main) trees.

[Ahmad Saleem]

Safari is passing all WPT tests:

https://wpt.fyi/results/dom/nodes/Node-compareDocumentPosition.html?label=master&label=experimental&aligned=

Anne - Do we need to anything here?