Tracking completion of last slide via JavaScript

Hi everyone,

My first post here. So excuse if I am unable to provide all information at the first go.

We have a web platform which supports broadcasting of SCORM by uploading a .zip folder. The zip folder is extracted at server level and the story_html5.html file is pointed to at the app. The mobile app loads the story_html5.html file in a web view to load the SCORM outside of the LMS.

Our challenge here is tracking completion of ALL SLIDES of a SCORM. We currently do that by invoking "goodbye.html" page on clicking of 'DONE' button by the user on the app (inside the web view) and the app detects user being redirected to goodbye.html.

But the problem is, can we track the completion of all slides by accessing any variable or by using a function that is available in the zip package? If yes, how can we do that via pure JavaScript? Maybe something like window.globals.CompletionStatus?