PartyTown Integration

[jacobd91]

This PR adds a new feature as an "extension" of the User Experience module

To enable visit Performance -> General Settings -> User Experience and check the checkbox for Enable Partytown

From there you can visit Performance -> User Experience and click on the PartyTown anchor in the anchor menu

Settings include

• Include List (textarea) - Define relative/absolute URLs for JS assets you wish to offload. This is a partial match check
• Atomics Support (checkbox) - Adds the required headers for Atomics to work. Will not work without it
• Preload (checkbox) - Preloads the main PartyTown driver file
• Debug Mode (checkbox) - Adds verbose browser console logging for both the service worker and Atomics
• Timeout (number) - Timeout in miliseconds before offloaded scripts will execute in main thread if the service worker or Atomics is taking too long
• Worker Concurrency Limit (number) - Set max limit of PartyTown workers that can run simultaneously

Once configured purge the cache and then refresh any front-end page. View the console log for any errors or debug output if enabled. To see if scripts were processed via the offload look at the DOM and search for "text/partytown" or your defined targets. If a defined target doesn't have type="text/partytown" then the mutator didn't find it. If the script was successfully offloaded then it will be type="text/partytown-x"

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 555 lines in your changes missing coverage. Please review.

Project coverage is 0.90%. Comparing base (5f60e03) to head (65aafaa).
Report is 34 commits behind head on master.

Files with missing lines	Patch %	Lines
UserExperience_Preload_Requests_Page_View.php	0.00%	127 Missing ⚠️
UserExperience_PartyTown_Extension.php	0.00%	124 Missing ⚠️
UserExperience_PartyTown_Page_View.php	0.00%	113 Missing ⚠️
UserExperience_PartyTown_Environment.php	0.00%	89 Missing ⚠️
UserExperience_PartyTown_Mutator.php	0.00%	45 Missing ⚠️
UserExperience_GeneralPage_View.php	0.00%	32 Missing ⚠️
FeatureShowcase_Plugin_Admin.php	0.00%	16 Missing ⚠️
UserExperience_Plugin_Admin.php	0.00%	5 Missing ⚠️
UserExperience_Preload_Requests_Extension.php	0.00%	3 Missing ⚠️
Root_Environment.php	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             master    #987      +/-   ##
===========================================
- Coverage      0.91%   0.90%   -0.01%     
- Complexity    19453   19509      +56     
===========================================
  Files           674     678       +4     
  Lines         97946   98430     +484     
===========================================
  Hits            893     893              
- Misses        97053   97537     +484     

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