debugging javascript console error

Question

I just got some big project and with error in console. there are many more than scripts used at that page but error shows very little information. there are 25 scripts loading at page. To give you an idea how many scripts they are you can see. :(

I have error in console but i can't find which original file, line number causing it. the error showing are in library. but i know it's not library bug it's caused by some other script. but this stack trace is very small. is there any tool or any other way where i can originally find from where it is originating.

let me know if further information is required.

Answer 1

If you click on link "amstock.js" you will be redirect to that file and directly in the line that was causing the error. Always the upper file is which causes the problem, but some times because of a previous one.

In adition, the error maybe cause by an asynchronous call that leaves your variable in null and fill it after the line of the error was call, or just you are trying to access a wrong variable. Check that line.