javascript node.js getting line number in try catch?

Question

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: 'called_non_callable', message: [Getter/Setter] }

Is there an easy way to make this more informative? Include line numbers and function names and such?

Pang · Accepted Answer · 2023-02-03 07:55:01Z

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)

function dumpError(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 accessibility (so you could use err.dumpError()), although extending Object.prototype bears the risk of overwriting existing functionality.

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