How to print a stack trace in Node.js?

Any Error object has a stack member that traps the point at which it was constructed.

var stack = new Error().stack
console.log( stack )

or more simply:

console.trace("Here I am!")

Now there's dedicated function on console for that:

console.trace()

To print stacktrace of Error in console in more readable way:

console.log(ex, ex.stack.split("\n"))

Example result:

[Error] [ 'Error',
  '    at repl:1:7',
  '    at REPLServer.self.eval (repl.js:110:21)',
  '    at Interface.<anonymous> (repl.js:239:12)',
  '    at Interface.EventEmitter.emit (events.js:95:17)',
  '    at Interface._onLine (readline.js:202:10)',
  '    at Interface._line (readline.js:531:8)',
  '    at Interface._ttyWrite (readline.js:760:14)',
  '    at ReadStream.onkeypress (readline.js:99:10)',
  '    at ReadStream.EventEmitter.emit (events.js:98:17)',
  '    at emitKey (readline.js:1095:12)' ]

With a readily available Node module, it is possible to get full-length stack traces out of Node (albeit with a minor performance penalty): http://www.mattinsler.com/post/26396305882/announcing-longjohn-long-stack-traces-for-node-js

Use console.trace() for printing stack trace console.trace()

For what I know printing the complete stack trace in nodejs is not possible, you can just print a "partial" stack trace, you can not see from where you came from in the code, just where the Exception occur. That's what Ryan Dahl explains in this youtube video. http://youtu.be/jo_B4LTHi3I at min 56:30 for being precise. Hope this helps