Pure JS portlets fail to instantiate when they have portlet preferences not contained in portlet instance configuration

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.2.10 DXP FP1, 7.2.X, 7.2.1 CE GA2, Master
• Component/s: Frontend Infrastructure
• Labels:
  • liferay-fixpack-dxp-1-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Sprint: S03E05 - Zagreb
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/76139

Steps to reproduce:

1. Deploy the attached portlet
2. Add the portlet to a widget page
3. In the portlet topper, go to Look and Feel Configuration
4. Change to use custom title and provide it, or change the application decorator
5. Save the config

Expected results:

1. The portlet renders successfully.

Actual results:

1. The content of the portlet won't be shown after these steps.

—

See https://github.com/liferay/liferay-js-toolkit/issues/364 for the issue originating this LPS.