Javascript backtrace

javascript reflection callstack backtrace
spraff picture spraff · Jul 22, 2011 · Viewed 19.1k times · Source

How to I get a backtrace in Javascript?

Ideal features:

  • entry function name, or some meaningful identifier for anonymous functions,
  • argument list at each level,
  • line numbers.

Can this be done in standard ECMAScript?

If not, can it be done in the common web browser dialects?

Thanks.

Edit --

Thanks for your suggestions.

My dialect doesnot support arguments.caller or arguments.callee.

I can do this:

try {
    let x = null;
    x .foo ();
}
catch (e) {
        debug (dump (e.stack));
}

Which gets me the information as a string, which is okay for at-a-glance, but it would be a great help to walk e.stack. Does it have a standard form?

Thanks again.

Answer

linzuojian picture linzuojian · Jun 10, 2015

In my debugging experience, I always use this 

(function () { console.log(new Error().stack); })();

As the comments below suggested, the readers should prefer: console.log(new Error().stack);

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