Function isError

test/angular/1.6/angular.js:796–804

* @description * Determines if a reference is an `Error`. * Loosely based on https://www.npmjs.com/package/iserror * * @param {*} value Reference to check. * @returns {boolean} True if `value` is an `Error`.

(value)

 * @returns {boolean} True if `value` is an `Error`.
 */
function isError(value) {
  var tag = toString.call(value);
  switch (tag) {
    case '[object Error]': return true;
    case '[object Exception]': return true;
    case '[object DOMException]': return true;
    default: return value instanceof Error;
  }
}

/**
 * @ngdoc function