error notificator

on-error-handler.js

window.onErrorNotice = function (func) {
  'use strict';

  var onerror = function(e) {
    func({
      title: e.title || 'JavaScript error',
      message: e.error && e.error.name && 'number' in e.error ? e.error.name + ': ' + e.message : e.message,
      file: (e.filename && e.filename.search(/^https?:|file:/) !== -1 ? e.filename + ':::' : '') + (e.filename ? e.filename + ':' + (e.lineno == null ? '' : e.lineno) + ':' + (e.colno == null ? '' : e.colno) : ''),
      stack: (e.error && e.error.stack) || e.stack || ''
    });
  };

  if (window.addEventListener) {
    window.addEventListener('error', onerror, false);
  } else {
    var oldOnError = window.onerror;

    window.onerror = function(message, filename, lineno, colno, error) {
      onerror({
        message: message,
        filename: filename,
        lineno: lineno,
        colno: colno,
        error: error
      });

      if (typeof oldOnError === 'function') {
        oldOnError.apply(window, arguments);
      }
    };
  }
};