Javascript Node.js Getting Line Number In Try Catch?

I'm using try catch on a node.js script: try {} catch (err) {console.log(err)} I get an output like this: { stack: [Getter/Setter], arguments: [ 'undefined' ], type: 'calle

Solution 1:

Those [Getter/Setter] members indicate further information available on the error object. You can easily dump the contents of those getters/setters using a small helper function (very trivial implementation, further refinement is up to you)

functiondumpError(err) {
  if (typeof err === 'object') {
    if (err.message) {
      console.log('\nMessage: ' + err.message)
    }
    if (err.stack) {
      console.log('\nStacktrace:')
      console.log('====================')
      console.log(err.stack);
    }
  } else {
    console.log('dumpError :: argument is not an object');
  }
}

try {
  not_defined.function_call();
} catch(err) {
  dumpError(err);
}

You could also extend the Object.prototype for improved accessability (so you could use err.dumpError()), although extending Object.prototype bears the risk of overwriting existing functionality.