I'm trying to check if the 'date-time' string is ISO formatted and I get the following output:

isIsoDate the date string is not ISO format! :  2022-04-21T09:40:01.000Z
isIsoDate converted-back date :  2022-04-21T09:40:01.000Z
isIsoDate time stamp number :  1650534001000
isIsoDate string builded back :  Thu Apr 21 2022 11:40:01 GMT+0200 (Ora legale dell’Europa centrale) 

this is my code:

export function isIsoDate(dateString) {
    
        var dateParsedNum = Date.parse(dateString);
        var dateBackToString = new Date(dateParsedNum);
        var stringBuilded = "";
    
    
        stringBuilded = dateBackToString.toString()
    
    
        if ((dateBackToString.toString()) == dateString) {
            return true;
            
        } else {
           console.debug("isIsoDate() the date string is not ISO format! : ", dateString);
           console.debug("isIsoDate() converted-back date : ", dateBackToString);
           console.debug("isIsoDate() time stamp number : ", dateParsedNum);
           console.debug("isIsoDate() string builded back : ", stringBuilded);
           // throw new BadRequestException('Validation failed');
        }
    
        return(false)
    }