eR.js

/**
 * Error handling helper with builtin debugMode
 * toggle
 *
 * @author: Max GJ Panas <http://maxpanas.com>
 * @license: MIT
 *
 * Based on ideas from Nicholas Zakas expressed in his article:
 * http://www.nczonline.net/blog/2009/04/28/javascript-error-handling-anti-pattern/
 */


/**
 * Error handling helper with builtin
 * debug mode toggle, for wrapping
 * volatile functions
 *
 * @param fn
 * @returns {*}
 */
function eR(fn) {
	return function () {
		if (eR.debug) {
			return fn();
		} else {
			try {
				return fn();
			} catch (err) {
				eR.handle(err, fn);
			}
		}
	}
}


/**
 * By default debug mode
 * is turned off
 *
 * @type {boolean}
 */
eR.debug = false;


/**
 * The default error handler
 * simply logs to console
 *
 * Should be overwritten
 *
 * @param err
 * @param fn
 */
eR.handle = function (err, fn) {
	console.error(fn.name + ':', err);
};


export default eR;

And you could use it like so:

import eR from './eR';

// example function
function volatileFunc(msg) {
  throw new Error('Ooops!' + msg);
}

// as a callback
runsCallback(eR(volatileFunc));

// directly
eR(volatileFunc)("oooooh...");