I am migrating a site from SP2010 to SP2013. The old site is not built by me so I am not familiar with the old design.
After migrated to SP2013 (run in SP2013 mode already) In one of the page contain a custom webpart. The page return Javascript error "abc.js Line 1 char 1 object expected". The JS file abc.js is existing. In order to trackle the JS error I need to find out how the file is included during rendering.
When I "view source" the page some JS files (include abc.js) are include. When I edit the page, there is a Content Editor webpart named "JS". When I look into it it is blank. The JS files are not included in Master page, too.
I have open the source code with VS2010. By search keyword "abc.js" for entire solution there is nothing.
What could be the trick? Sorry I am not a developer.