Function isDate$1

codebase/sources/dhtmlxscheduler.es.js:1451–1457

(obj)

  return obj && typeof obj === "object" && Function.prototype.toString.call(obj.constructor) === "function Boolean() { [native code] }";
}
function isDate$1(obj) {
  if (obj && typeof obj === "object") {
    return !!(obj.getFullYear && obj.getMonth && obj.getDate);
  } else {
    return false;
  }
}
function defined(obj) {
  return typeof obj != "undefined";
}