? ?? ??? ????? ?? ??? ???? ?????. ??? ?? ??? ??? ?? ???? ??? ?? ??? ????? ?????. ??? ????? ???? ??? ?????.

??? main ??? ?? ??? ???? ??? ??? ???? ???? ????? ?????. ??? ???? ? ?? ??? ????.

• ???? ??: ??? ??? ?????. ??? ??? ???? ????? ???? ?????? ??? ??? ???????. div? ?????? ??? ???? ?? ???? ??? ????.
• ??? ?? ??: totalHeight? ??? ??? ??? ?? ???? ? ????. outerHeight(true)? ???? ????? ?? ??? ?????. ?? ?? ?? ? ??? ??? ? ?? ?? ???? ???? ????.
• ??? ???? ??: ???? ???? ? ??? ???? ?????? ??? ????. ??? ??? ???? ? ?? ??????.
• ??? ?? ??: footerHeight? ?? ???? ????? ?? ???? ??? ?? ??? ??? ??? ? ????.

??? ??? ??? ???? ??? ?????.

$(document).ready(function() {
  if ($('body').hasClass('single')) {
    const progressBar = $('<div id="reading-progress"></div>');
    $('header').after(progressBar);

    let totalHeight = $('main').height(); // Use height() for more accurate calculation
    let windowHeight = $(window).height();

    $(window).on('scroll', function() {
      let scrollTop = $(this).scrollTop();
      let progress = (scrollTop / (totalHeight - windowHeight)) * 100; // Adjust for window height
      progress = Math.min(progress, 100); // Cap progress at 100%
      $('#reading-progress').css('width', progress + '%');
    });
  }
});

??? ??:

1. ??? ??? ??: ??? ??? ??? ?? ?? ID? div? reading-progress? ???? ?????.
2. height() ??: ?? ??? ??? ?? ???? ???? ?? height() ?? outerHeight(true)? ?????.
3. ??? ??? ??: $(window).on('scroll', ...)? ???? ???? ???? ? ??? ???? ??? ????? ???????.
4. ???? ???? ??: ??? ??? ???? ? ??? ???? ??? 100%? ???? ??? ???.
5. CSS ??(??): #reading-progress div? ???? ????? CSS? ???? ???. ?:

#reading-progress {
  height: 5px; /* Adjust height as needed */
  background-color: #007bff; /* Adjust color as needed */
  position: fixed;
  top: 0;
  left: 0;
  width: 0; /* Initially 0% width */
  z-index: 1000; /* Ensure it's on top */
}

? ??? ????? ????? jQuery? ???? ???. ? ??? ??? ?? ???? ??? ?? ??? ???? ?????. ???? ???? ?? ??? ?? ? ?? ??? ??? ??? ??? ? ????.

? ??? ?? ??? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!