jQuery 網頁捲動動畫

$(window).scroll(function() {
$(“.slideanim”).each(function() {
var pos = $(this).offset().top;
//傳回此物件距離最上面的長度
var winTop = $(window).scrollTop();
// 偵測window的捲動值
if (pos < winTop + 600) {
//假設原距離top有1000，捲軸滑到距離它600px時就會滑出來
$(this).addClass(“paraslide”);
}
});
});

.slideanim {
  visibility: hidden;
}

.paraslide {
  /* The name of the animation */
  animation-name: slide;
  -webkit-animation-name: slide;
  /* The duration of the animation */
  animation-duration: 1s;
  -webkit-animation-duration: 1s;
  /* Make the element visible */
  visibility: visible;
}

/* Go from 0% to 100% opacity (see-through) and specify the percentage from when to slide in the element along the Y-axis */
@keyframes slide {
  0% {
    opacity: 0;
    -webkit-transform: translateY(70%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0%);
  }
}
@-webkit-keyframes slide {
  0% {
    opacity: 0;
    -webkit-transform: translateY(70%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0%);
  }
}