Can someone assist me. below is a snippet of code and getting issue with. inside of the each function the "this" returns all the child elements of ".countdown-timer", which is what I expect it to be. However, inside of the setInterval() function the value of "this" is window object. I would like to know as to why this is the case.

$(function(){
    $('.countdown-timer').each(function(){
       console.log(this);
        if(this.dataset.enddate){
            $(this).append(timercontent);
            var data =this.dataset.enddate.split('-');
                
                 setInterval(function() {                 
                    console.log(this);
                    if (distance < 0) {
                      clearInterval(x);
                      $(".countdown-timer").append('<h3>Expired!</h3>')
                    }
                  }, 1000);
            
        }
    })
})