Clicking the export button from Manage Pages causes JavaScript errors in browser console and decreases browser performance

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.X EE
• Fix Version/s: 6.1.X EE
• Component/s: Legacy, Legacy > Administration UI
• Labels:
  • 6.1_release_notes
  • liferay-fixpack-portal-40-6130
• Branch Version/s:
  6.1.x
• Backported to Branch:
  Committed
• Story Points: 6
• Fix Priority: 3
• Git Pull Request: https://github.com/hhuijser/liferay-portal-ee/pull/2378

Clicking the export button from Manage Pages causes JavaScript errors in browser console and decreases browser performance.

Steps to reproduce:

1. Start up Liferay.
2. Open up developer tools for your browser and switch to "Console".
3. Navigate to "Manage Pages" and click "Page".
4. Click the "Export" button on the modal window.
5. Observe the JavaScript errors thrown in the console window of the browser developer tools.

Expected Result: The export modal window should load with all options and no JavaScript errors should be thrown.
Acutal Result: The export modal window slowly loads and hundreds (sometimes thousands if left long enough) of JavaScript errors are thrown.

See below for a screenshot of the exceptions.