/* ============================================================================

Name: Scroll Indicator
Date: 2021-06-04
Author: apost
blog: blogpack.tistory.com
email: extflash@gmail.com
Distributed under MIT License

============================================================================ */

window.addEventListener('DOMContentLoaded', function(){
    //스크롤 이벤트 처리
    window.addEventListener("scroll", function(event){
        if(document.querySelector('.progressbar') != null)setProgress();
    });
});

function setProgress() {          
    let currY = document.documentElement.scrollTop;//스크롤한 높이
    let totalY = document.documentElement.scrollHeight - document.documentElement.clientHeight;//전체 높이
    let percentage = (currY / totalY) * 100;//퍼센트 값
    document.querySelector(".progress").style.width = percentage + "%";//프로그래스바 너비 변경
}