在ViewPort中制作CSS动画

问题描述

如果我在所有情况下都将类测试更改为FadeInUp，则它说在向上滚动时测试视口中的动画停止工作。即时消息类的更改除了更改名称之外，应该没有其他作用？？？
我在做什么错，当将所有测试实例更改为FadeInUp时，为什么在查看端口中div停止工作？？

$(document).ready(function() {

  var $animationElements = $('.animation-element');
  var $window = $(window);

  // ps: Let's FIRST disable triggering on small devices!
  var isMobile = window.matchMedia("only screen and (max-width: 768px)");
  if (isMobile.matches) {
      $animationElements.removeClass('animation-element');
  }

  function checkIfInView() {

      var windowHeight = $window.height();
      var windowTopPosition = $window.scrollTop();
      var windowBottomPosition = (windowTopPosition + windowHeight);

      $.each($animationElements,function () {
          var $element = $(this);
          var elementHeight = $element.outerHeight();
          var elementTopPosition = $element.offset().top;
          var elementBottomPosition = (elementTopPosition + elementHeight);

//check to see if this current container is within viewport
          if ((elementBottomPosition >= windowTopPosition) &&
              (elementTopPosition <= windowBottomPosition)) {
              $element.addClass('in-view');
          } else {
              $element.removeClass('in-view');
          }
      });
  }

  $window.on('scroll resize',checkIfInView);
  $window.trigger('scroll');


  /* @end viewport trigger script  */

});

/** ----//
*  @group standaard animaties
*  @author @david
*/

/* Trigger  */
.animated {
  animation-duration: 1s;
  animation-fill-mode: both;
  }

/* Optional Delays,change values here  */
.one { animation-delay: 0.2s; }
.two { animation-delay: .6s; }
.three { animation-delay: 1s; }
.four { animation-delay: 1.4s; }

/* Animations start here  */




/* FADE IN UP BIG */

@keyframes FadeInUp {
from { opacity: 0; transform: translate3d(0,100px,0); }
  to { opacity: 1; transform: none; } }
.FadeInUp { animation-name: FadeInUp; }


/* FADE IN LEFT BIG */

@keyframes FadeInLeft {
  from { opacity: 0; transform: translate3d(-100px,0); }
  to { opacity: 1; transform: none; } }
.FadeInLeft { animation-name: FadeInLeft; }


@keyframes FadeInRight {
  from { opacity: 0; transform: translate3d(500px,0); }
  to { opacity: 1; transform: none; } }
.FadeInRight { animation-name: FadeInRight; }



/* @end standaard animaties  */
 body {
    overflow-x:hidden; /* hides scrollbar but does it cause other issues????*/
}

.callout {border: 1px solid green;
padding:10px;
  margin:0 auto;
text-align: center;
display:table;
}

.test.in-view {
   animation: FadeInUp;
    animation-duration: 3s;
   animation-delay: 0s;
  animation-fill-mode: both;
   backface-visibility: hidden;
  }
.FadeInUp.in-view {
   animation: FadeInUp;
    animation-duration: 3s;
   animation-delay: 0s;
  animation-fill-mode: both;
   backface-visibility: hidden;
  }
.test2.in-view {  
   animation: FadeInLeft;
    animation-duration: 3s;
   animation-delay: 0s;
  animation-fill-mode: both;
   backface-visibility: hidden;
}
.test3.in-view {  
   animation: FadeInRight;
    animation-duration: 3s;
   animation-delay: 0s;
  animation-fill-mode: both;
   backface-visibility: hidden;
}

/* if it was SASS you could use: 
.test2.in-view {
     @extend .fadeInUpBig;
}
*/

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
 <script>
</script>
<style> 
</style>

</head>
<body>

<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout test animation-element">fade in from bottom</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test2">fade in left</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test3">fade in right</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout test animation-element">fade in bottom</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test2">fade in left</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test3">fade in right</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout test animation-element">fade in from bottom</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test2">fade in left</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<div class="callout animation-element test3">fade in right</div>
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />


</body>
</html>

解决方法

尝试修改：

    if (isMobile.matches) {
        $animationElements.removeClass('animation-element');
    }

附带：

    if (isMobile.matches) {
        $(animationElements).removeClass('animation-element');
    }

对所有类使用小写字母可解决问题。它试图运行带有大写字母而不是包含动画的类的关键帧动画。

.fadeInup.in-view {
animation: FadeInUp;
animation-duration: 3s;
animation-delay: 0s;
animation-fill-mode: both;
backface-visibility: hidden;
}


<div class="callout fadeInup animation-element">fade in from bottom</div>

animation viewport

在ViewPort中制作CSS动画

问题描述

解决方法

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