error-logger.js

window.onerror = function(message, file, line, column, error) {
  var errorToReport = {
    type: error ? error.type : '',
    message: message,
    file: file,
    line: line,
    column: column,
    stack: error ? error.stack : '',
    userAgent: navigator.userAgent,
    href: location.href
  };
  var url = '/error-reporting?error=' +
    JSON.stringify(errorToReport);
  var image = new Image();
  image.src = url;
};