How to report console.error with Sentry?

Question

I have application where some critical issues are reported with console.error but are not thrown so application might continue to run - possibly in cri

Answer 1

Here's a more robust override solution

// creating function declarations for better stacktraces (otherwise they'd be anonymous function expressions)
var oldConsoleError = console.error;
console.error = reportingConsoleError; // defined via function hoisting
function reportingConsoleError() {
  var args = Array.prototype.slice.call(arguments);
  Sentry.captureException(reduceConsoleArgs(args), { level: 'error' });
  return oldConsoleError.apply(console, args);
};

var oldConsoleWarn = console.warn;
console.warn = reportingConsoleWarn; // defined via function hoisting
function reportingConsoleWarn() {
  var args = Array.prototype.slice.call(arguments);
  Sentry.captureMessage(reduceConsoleArgs(args), { level: 'warning' });
  return oldConsoleWarn.apply(console, args);
}

function reduceConsoleArgs(args) {
  let errorMsg = args[0];
  // Make sure errorMsg is either an error or string.
  // It's therefore best to pass in new Error('msg') instead of just 'msg' since
  // that'll give you a stack trace leading up to the creation of that new Error
  // whereas if you just pass in a plain string 'msg', the stack trace will include
  // reportingConsoleError and reportingConsoleCall
  if (!(errorMsg instanceof Error)) {
    // stringify all args as a new Error (which creates a stack trace)
    errorMsg = new Error(
      args.reduce(function(accumulator, currentValue) {
        return accumulator.toString() + ' ' + currentValue.toString();
      }, '')
    );
  }
  return errorMsg;
}