Javascript | Make Error objects JSON.stringify-able

stringifiable_errors.js

// more info: https://stackoverflow.com/questions/18391212/is-it-not-possible-to-stringify-an-error-using-json-stringify

// Example:
// var error = new Error('testing');
// error.detail = 'foo bar';
// console.log(JSON.stringify(error)); // Prints {"message":"testing","detail":"foo bar"}

Object.defineProperty(Error.prototype, 'toJSON', {
  value: function(){
    var alt = {};

    Object.getOwnPropertyNames(this).forEach(function(key){
      alt[key] = this[key];
    }, this);

    return alt;
  },
  configurable: true
});