@spalger/kibana/src/ui/public/notify/errors.js

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

define(function (require) {
  var errors = {};
  var _ = require('lodash');

  var canStack = (function () {
    var err = new Error();
    return !!err.stack;
  }());

  // abstract error class
  _.class(KibanaError).inherits(Error);
  function KibanaError(msg, constructor) {
    this.message = msg;

    Error.call(this, this.message);
    if (!this.stack) {
      if (Error.captureStackTrace) {
        Error.captureStackTrace(this, constructor || KibanaError);
      } else if (canStack) {
        this.stack = (new Error()).stack;
      } else {
        this.stack = '';
      }
    }
  }
  errors.KibanaError = KibanaError;

  return errors;
});