Trace the line of code/file a function call originated from in JavaScript

Question

I've written a very simple function to ensure ensure my applications do not break if I forget to remove a console.log().

Simply put:

myNamespace.log = function( msg ){
   if( window.console ){
      console.log(obj);
   }
}

It works like a charm. Alas, I very much liked the ability to see from which line of code and file my console messages came from. Is there a (chrome/FF friendly) way to get the file/line of code a function call?

See [How to get JavaScript caller function line number? How to get JavaScript caller source URL? ](stackoverflow.com/questions/1340872/…). scotts's answer points to a cross-browser script that wraps all of the browser-specific methods. — Matthew Flaschen
– Matthew Flaschen, Commented Dec 28, 2010 at 22:12

Pointy · Accepted Answer · 2010-12-28 21:55:12Z

2

If it were my site, I'd use:

myNamespace.log = function( msg ){
  if( window.console && window.console.log && typeof window.console.log === "function" ){
    console.log(obj);
  }
}

I seriously doubt there's a browser-agnostic way to get source file line number.

answered Dec 28, 2010 at 21:55

Pointy

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2 Comments

Derek Adair Over a year ago

well I just realized it's for my personal use so chrome/FF would suffice for this particular functionality. What do the additional conditions in the if statement do?

Pointy Over a year ago

Check to make sure that "window.console" actually has a "log" property, and that the property is really a function you can call. Probably overly paranoid, but if you want to really make sure that stray "console.log" calls definitely won't cause an exception that'd be more insurance.

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