// Select all links with hashes
$('a[href*="#"]')
  // Remove links that don't actually link to anything
  .not('[href="#"]')
  .not('[href="#0"]')
  .not('[href="#multi-item-example"]')
  .not('[href="#carouselExampleControls"]')
  .not('[href="#multi-item-example2"]')
  .not('[href="#carouselId"]')
  .click(function(event) {
    // On-page links
    if (
      location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') 
      && 
      location.hostname == this.hostname
    ) {
      // Figure out element to scroll to
      var target = $(this.hash);
      target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
      // Does a scroll target exist?
      if (target.length) {
        // Only prevent default if animation is actually gonna happen
        event.preventDefault();
        $('html, body').animate({
          scrollTop: target.offset().top
        }, 1000, function() {
          // Callback after animation
          // Must change focus!
          var $target = $(target);
          $target.focus();
          if ($target.is(":focus")) { // Checking if the target was focused
            return false;
          } else {
            $target.attr('tabindex','-1'); // Adding tabindex for elements not focusable
            $target.focus(); // Set focus again
          };
        });
      }
    }
  });

  $('.img-parallax').each(function(){
    var img = $(this);
    var imgParent = $(this).parent();
    function parallaxImg () {
      var speed = img.data('speed');
      var imgY = imgParent.offset().top;
      var winY = $(this).scrollTop();
      var winH = $(this).height();
      var parentH = imgParent.innerHeight();
  
  
      // The next pixel to show on screen      
      var winBottom = winY + winH;
  
      // If block is shown on screen
      if (winBottom > imgY && winY < imgY + parentH) {
        // Number of pixels shown after block appear
        var imgBottom = ((winBottom - imgY) * speed);
        // Max number of pixels until block disappear
        var imgTop = winH + parentH;
        // Porcentage between start showing until disappearing
        var imgPercent = ((imgBottom / imgTop) * 100) + (50 - (speed * 50));
      }
      img.css({
        top: +(imgPercent/1) + '%',
        transform: 'translate(0%, -' + imgPercent + '%)',
      });
    }
    $(document).on({
      scroll: function () {
        parallaxImg();
      }, ready: function () {
        parallaxImg();
      }
    });
  });