Errors

Throw

throw new Error("My message")

Try catch

Catch an error, log it, then throw it again.

try {
  // ...
} catch (err) {
  console.log(`Cannot foo the bar - ${err.toString()})
  
  throw Err
}

Getting details of an error.

Note that using ${err} will show nothing in the string, and the whole trace will be printed afterwards.

So do one of these below.

Given error:

new Error("My message")

Convert to string - with error type and the message.

> err.toString()
'Error: My message'

Get just the message:

> err.message
'My message'

Get just the stack traceback.

> err.stack
'Error: My message\n' +
  '    at REPL2:1:11\n' +
  '    at Script.runInThisContext (vm.js:120:18)\n' +
  '    at REPLServer.defaultEval (repl.js:442:29)\n' +
  '    at bound (domain.js:427:14)\n' +
  '    at REPLServer.runBound [as eval] (domain.js:440:12)\n' +
  '    at REPLServer.onLine (repl.js:777:10)\n' +
  '    at REPLServer.emit (events.js:326:22)\n' +
  '    at REPLServer.EventEmitter.emit (domain.js:483:12)\n' +
  '    at REPLServer.Interface._onLine (readline.js:329:10)\n' +
  '    at REPLServer.Interface._line (readline.js:658:8)'

Create

const x =

x Error: My message at REPL2:1:11 at Script.runInThisContext (vm.js:120:18) at REPLServer.defaultEval (repl.js:442:29) at bound (domain.js:427:14) at REPLServer.runBound [as eval] (domain.js:440:12) at REPLServer.onLine (repl.js:777:10) at REPLServer.emit (events.js:326:22) at REPLServer.EventEmitter.emit (domain.js:483:12) at REPLServer.Interface._onLine (readline.js:329:10) at REPLServer.Interface._line (readline.js:658:8)