(function (){
"use strict";
function initButton(){
var buttonPath=document.querySelector('.smooth-back-to-top-button path, .smooth-back-to-top-button rect');
if(!buttonPath){
return;
}
var pathLength=buttonPath.getTotalLength();
buttonPath.style.strokeDasharray=pathLength + ' ' + pathLength;
buttonPath.style.strokeDashoffset=pathLength;
var isTicking=false;
var updateButtonProgress=function (){
var scroll=window.scrollY;
var height=document.documentElement.scrollHeight - window.innerHeight;
var progress=height > 0 ? pathLength - (scroll * pathLength / height):pathLength;
buttonPath.style.strokeDashoffset=progress;
isTicking=false;
};
var onScroll=function (){
if(!isTicking){
window.requestAnimationFrame(updateButtonProgress);
isTicking=true;
}};
updateButtonProgress();
window.addEventListener('scroll', onScroll, { passive: true });
}
if(document.readyState==='loading'){
document.addEventListener('DOMContentLoaded', initButton);
}else{
initButton();
}})();