One is located in the directory
The other one is managed by Webpacker and you can read more about in its own guide.
application.js automatically includes all JS files via the statement:
//= require_tree .
One JS file in particular,
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initializeBaseTracking(); initializeTouchDevice(); initializeCommentsPage(); initEditorResize(); initLeaveEditorWarning(); initializeArticleReactions(); initNotifications(); initializeSplitTestTracking();
All the "initializers" are in