td's aren't instances of HTMLTableCellElement

[jakemac53]

When under the polyfill, td's aren't instances of HTMLTableCellElement. It looks like this has been broken for a while

webcomponentsjs/src/ShadowDOM/wrappers/override-constructors.js

Line 86 in e49de93

// 'td': 'HTMLTableCellElement',

. Is there anything we can do about it?

Specifically this causes an issue on the dart side of things, because dart:html actually verifies the base class is of the expected type when registering an element. We might be able to put an exception in for td if it comes to that though....

[jakemac53]

http://jsbin.com/jetemasara/1/edit is an example of this (works in chrome, doesn't in FF)

[jmesserly]

technically should be an HTMLTableDataCellElement:
https://html.spec.whatwg.org/multipage/tables.html#the-td-element

I'm not sure if any browsers implement that subtype except IE. The bugs the code linked too are still open. Since browsers are inconsistent, not sure what the polyfill should do. I suppose it could polyfill that interface for Chrome/Safari/Firefox, bringing them up to spec. Or alternatively emulate the bugged behavior on IE. Not sure what is best.

FWIW, I don't think Dart should be relying on these kind of details...

[TimvdLippe]

http://jsbin.com/jetemasara/1/edit?html,output appears to be working in both Chrome and Firefox now