Question

I’m writing an error event handler that captures an error and make an ajax call to the server to report it. The problem is that a lot of times, my code looks like this:

function A() {

  //lots of works to calculate SomeParameters; can bug
  CalledVeryOften(SomeParameters);
}

function CalledVeryOften(SomeParameters) {
  // a little bit of work
}

If I capture the event in function A (or B, C, D…), great! But the problem is that if the window.onerror event fires in CalledVeryOften then it might be that the parameters might not be properly calculated.

Is there a way in CalledVeryOften to determine which function it was called from?

Thanks.

Answer 1

The name of the calling function can be obtained via the deprecated arguments.callee.caller.name property ^{MDN: arguments.callee}.

Another method is by parsing the value of new Error().stack.

In Chrome you can use:

var stackTrace = {};
Error.captureStackTrace(stackTrace); // Get the stack trace
stackTrace = stackTrace.stack;       // Formatted string