utilsmodule.jsline 28Utility functionsEXAMPLESimport { isUndefined, isNull, isExisty } from './module'; isUndefined(); isNull(); isExisty();Static MethodsisExisty(param)module.jsline 55Checks whether the given variable is existing or not.PARAMETERSNameTypeDescriptionparam*Target for checkingRETURNS:{ boolean } - StateisNull(param)module.jsline 39Checks whether the given variable is null or not.PARAMETERSNameTypeDescriptionparam*Target for checkingRETURNS:{ boolean } - StateisUndefined(param)module.jsline 28Checks whether the given variable is undefined or not.PARAMETERSNameTypeDescriptionparam*Target for checkingRETURNS:{ boolean } - State