1446144 - my.xfinity.com navigation bar missing with custom elements enabled

Status: RESOLVED WORKSFORME

(Core :: DOM: Core & HTML, defect, P3)

Description

[Adam Stevenson [:adamopenweb]]

Attachment: custom elements enabled

Top navigation bar is missing on my.xfinity.com with dom.webcomponents.customelements.enabled set to true.

Steps to reproduce:
1. Open Nightly
2. Ensure dom.webcomponents.customelements.enabled is set to true
3. Navigate to https://my.xfinity.com/?cid=cust

Expected results:
Navigation bar is present

Actual results:
Navigation bar is blank / missing

Disabling dom.webcomponents.customelements.enabled fixes the issue

Comment 1

[Adam Stevenson [:adamopenweb]]

Attachment: custom elements disabled

Comment 2

[Adam Stevenson [:adamopenweb]]

Originally reported: https://webcompat.com/issues/16027

Console error:
TypeError: Constructor HTMLElement requires 'new'           polaris.js:1:96

Comment 3

[Mike Taylor [:miketaylr]]

Note: this will continue to be busted as each new release ships in Nightly, but isn't riding the trains (for now).

Comment 4

[Marion Daly [:mdaly]]

:overholt is custom elements riding the trains for 61?

Comment 5

[Andrew Overholt [:overholt]]

No

Comment 6

[Olli Pettay [:smaug][[e-mail]]]

FYI, Custom elements will ship once Shadow DOM is ready to ship too.

Comment 7

[Dave Townsend [:mossop]]

This appears to be working on Nightly now.