有没有办法在 WayPoints 中说出实际网站顶部与浏览器当前顶部的偏移量 window？

Question

我有一个以基本 SVG 动画开头的徽标。当用户向下滚动时，它会触发另一个动画，将徽标向侧面推并显示徽标的一部分。当您向上滚动时，徽标会滑回视图中。

一切都很好！

问题如果我重新加载页面一半，或者（这很奇怪）将鼠标悬停在 link 上，动画将重新启动，因此徽标可见并覆盖内容。这显然不是想要的效果。

问题有什么方法可以让我从页面顶部偏移 20% 与浏览器顶部，这样动画将不会重新触发或执行任何操作，直到它不是实际顶部的 20%？

您可以看到徽标的运行速度（和错误） https://stable.stable-demos.com/our-work/

如何复制 加载页面，向下滚动一半，重新加载页面。您将看到完整的徽标，只有在用户再次滚动时才能再次隐藏（因为它正在测量浏览器 window 偏移量与页面偏移量的顶部）。

天哪，我希望这是有道理的。感谢大家的参与！

jQuery(document).ready(function($) {

 // Smooth OUT
 $('#smooth-logo').waypoint(function(direction) {
  
  if (direction === 'down') {

   $('.fadeMe').addClass('blur-in-fwd');
   $('.fadeMe').removeClass('blur-in-bkw');
   $('#smooth-logo').addClass('slideLeft');
   $('#smooth-logo').removeClass('slideRight');
   $('#animOut').get(0).beginElement(); // restart the animation

  } else if (direction === 'up') {  

   $('.fadeMe').addClass('blur-in-bkw');
   $('.fadeMe').removeClass('blur-in-fwd slide-right');
   $('#smooth-logo').addClass('slideRight');
   $('#smooth-logo').removeClass('slideLeft');
   $('#animIn').get(0).beginElement(); // restart the animation
  }
 }, 
  
 { offset: '0%' });
 
});

.header {
  min-height: 2000px;
  position: relative;
}

#smooth-logo {
  position: fixed;
}

/* PRIMARY LOAD ANIMATION */
.dropInAll {
  animation: drop 0.5s alternate;
  opacity: 0;
  animation-fill-mode:forwards;
}
.dropIn1 {
  animation-delay: 0.4s;
}
.dropIn2 {
  animation-delay: 0.5s;
}
.dropIn3 {
  animation-delay: 0.6s;
}

/* Slide Letters */
.slideAll {
  position: relative;
  animation: slideThis 5s alternate;
  animation-duration: 0.5s;
  opacity: 0;
  animation-fill-mode:forwards;
}
@keyframes slideThis {
    0% {opacity: 0.2;-webkit-transform: translateX(200px);}
    100% {opacity: 1;-webkit-transform: translateX(0px);}
}

/* S */
.bigS {
  animation-delay: 0.5s;
}
/* T */
.bigS1 {
  animation-delay: 0.6s;
}
/* A */
.bigS2 {
  animation: drop 0.5s ease-in-out, colorChange 5s ease-in 30s infinite;
  animation-delay: 1.2s;
}
@keyframes drop {
  0% {opacity: 0.2;transform: translateY(-100px);}
  100% {opacity: 1;transform: translateY(0px);}
}
@keyframes colorChange {

    0% { opacity: 1; fill: black; }
    20% { opacity: 1; fill: black; }
    50% { opacity: 1; fill: maroon; }
    100% { opacity: 1; fill: black; }
}

.bigS3 {
  animation-delay: 0.9s;
}
/* B */
.bigS4 {
  animation-delay: 1s;
}
/* L */
.bigS5 {
  animation-delay: 1.1s;
}
/* E */
.bigS6 {
  animation-delay: 1.2s;
}

/* SCROLLING ANIMATIONS */
.blur-in-fwd {
  filter: url(#filt-blur-out);
}
.blur-in-bkw {
  filter: url(#filt-blur-in);
}

/* Slide Animations */
.slideLeft {
  -webkit-animation: slide-left .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation: slide-left .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation-delay: 1.8s;
}
#filt-blur-in {
  animation-delay: 2s!important;
}
@keyframes slide-left {
  0% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
  100% {
    -webkit-transform: translateX(-200px);
            transform: translateX(-200px);
  }
}
.slideRight {
  -webkit-animation: slide-right .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation: slide-right .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
}
@keyframes slide-right {
  0% {
    -webkit-transform: translateX(-200px);
            transform: translateX(-200px);
  }
  100% {
    -webkit-transform: translateX(0px);
            transform: translateX(0px);
  }
}


/* SCROLLING ANIMATIONS */
@keyframes text-blur-out {
  0% {
    -webkit-filter: blur(0.01);
            filter: blur(0.01);
  }
  100% {
    -webkit-filter: blur(12px) opacity(0%);
            filter: blur(12px) opacity(0%);
  }
}
@keyframes text-blur-in {
  0% {
    -webkit-filter: blur(12px) opacity(0%);
            filter: blur(12px) opacity(0%);
  }
  100% {

    -webkit-filter: blur(0.01);
            filter: blur(0.01);
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/waypoints/4.0.1/jquery.waypoints.min.js"></script>
<script src="../custom.js"></script>
<link href="smooth.css" rel="stylesheet" type="text/css">

<header class="header">
<div id="smooth-logo">
 <svg data-name="big-s" xmlns="http://www.w3.org/2000/svg" width="6in" height="2in" viewBox="0 0 2036.7197 612">
  <title>Stable Smooth Logo</title>

  <!-- small the -->
  <polygon id="dropIn1" class="dropIn1 dropInAll" points="150.137 367.127 137.813 367.127 137.813 443.443 150.137 443.443 150.137 411.917 234.251 411.917 234.251 398.656 150.137 398.656 150.137 367.127"/>

  <polygon id="dropIn2" class="dropIn2 dropInAll" points="137.813 282.344 179.534 282.344 179.534 334.01 137.813 334.01 137.813 347.139 234.251 347.139 234.251 334.01 191.992 334.01 191.992 282.344 234.251 282.344 234.251 269.212 137.813 269.212 137.813 282.344"/>

  <polygon id="dropIn3" class="dropIn3 dropInAll" points="222.066 172.104 222.066 229.389 191.725 229.389 191.725 181.212 179.534 181.212 179.534 229.389 150.004 229.389 150.004 172.104 137.813 172.104 137.813 242.518 234.251 242.518 234.251 172.104 222.066 172.104"/>


  <!-- BIG S -->
  <path id="bigS" class="fadeMe bigS slideAll" d="M362.2168,367.2317c23.8106,16.6907,51.0516,32.82,83.83,32.82,32.1888,0,56.8072-10.392,56.8072-33.4934,0-22.7209-10.6044-34.0863-70.4407-43.93-59.8364-10.6044-89.757-33.7058-89.757-78.3966,0-46.9588,39.96-79.6635,99.4161-79.6635,36.6579,0,63.8458,7.9425,97.4489,28.7153l-18.0235,37.88c-33.9085-17.7179-47.9607-24.0272-78.4851-24.0272-30.6717,0-49.227,14.75-49.227,35.9591,0,19.3162,10.6044,28.7841,67.4117,38.6325,65.1385,10.98,93.5422,35.2179,93.5422,81.8012,0,49.6124-39.7691,83.9606-109.8293,83.9606-38.3944,0-79.8883-17.5373-102.94-38.04Z"/>
  <!-- Big S Blur Animation -->
  <defs>

    <!-- BLUR IN -->
       <filter id="filt-blur-out" x="-50%" y="-50%" width="200%" height="200%">
         <feGaussianBlur in="SourceGraphic" stdDeviation="0" result="blurpart">
           <animate id="animOut"
                    attributeName="stdDeviation" from="0" to="50" dur="1.2s" fill="freeze" begin="indefinite"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feGaussianBlur>
         <feFlood flood-color="white" flood-opacity="1" result="alphapart">
           <animate attributeName="flood-opacity" from="1" to="0" dur="1.2s" fill="freeze" begin="animOut.begin"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feFlood>
         <feComposite in="blurpart" in2="alphapart" operator="in"/>
       </filter>
       
       <!-- BLUR OUT -->
       <filter id="filt-blur-in" x="-50%" y="-50%" width="200%" height="200%">
         <feGaussianBlur in="SourceGraphic" stdDeviation="50" result="blurpart">
           <animate id="animIn"
                    attributeName="stdDeviation" from="50" to="0" dur="1.2s" fill="freeze" begin="indefinite"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530" />
         </feGaussianBlur>
         <feFlood flood-color="white" flood-opacity="0" result="alphapart">
           <animate attributeName="flood-opacity" from="0" to="1" fill="freeze" dur="1.2s" begin="animIn.begin"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feFlood>
         <feComposite in="blurpart" in2="alphapart" operator="in"/>
       </filter>
     </defs>


  <!-- BIG T -->
  <polygon id="bigS1" class="fadeMe bigS1 slideAll" points="682.881 444.996 682.881 215.385 581.132 215.385 602.355 171.38 842.615 171.38 821.253 215.385 731.83 215.385 731.83 444.996 682.881 444.996"/>

  <!-- ICON UPPER -->
  <polygon id="bigS2" class="bigS2 slideAll"points="1022.924 362.747 964.44 234.65 909.723 362.747 859.133 362.747 940.211 171.373 989.104 171.373 1070.894 362.747 1022.924 362.747"/>

  <!-- ICON LOWER -->
  <polygon id="bigS3" class="bigS3 slideAll" points="819.226 444.996 839.223 403.871 1090.947 403.871 1110.751 444.996 819.226 444.996"/>

  <!-- BIG B -->
  <path id="bigS4" class="fadeMe bigS4 slideAll" d="M1162.8,444.9959V171.38h126.5218c30.6233,0,54.9008,8.0925,70.2054,23.3971,11.8676,11.8747,17.6358,26.2214,17.6358,43.8714,0,52.9109-39.4831,64.1835-39.4831,64.1835s55.5343,7.9083,55.5343,69.55c0,63.2891-63.0285,72.6141-100.6033,72.6141Zm47.3013-41.1245h82.51c45.3081,0,52.07-24.1155,52.07-38.49,0-15.1989-7.029-39.3074-54.1261-39.3074h-80.453Zm0-117.0149h65.6415c46.0124,0,52.8864-23.6014,52.8864-37.6664,0-23.89-18.2345-36.686-48.7733-36.686h-69.7546Z"/>

  <!-- BIG L -->
  <polygon id="bigS5" class="fadeMe bigS5 slideAll" points="1454.812 444.996 1454.812 171.38 1503.761 171.38 1503.761 401.808 1650.476 401.808 1629.693 444.996 1454.812 444.996"/>

  <!-- BIG E -->
  <polygon id="bigS6" class="fadeMe bigS6 slideAll" points="1694.008 444.996 1694.008 171.38 1898.906 171.38 1878.604 213.328 1742.542 213.328 1742.542 281.122 1856.181 281.122 1835.818 323.07 1742.542 323.07 1742.542 403.04 1898.482 403.04 1878.199 444.996 1694.008 444.996"/>
 </svg>
</div>
</header>

我试过这个更新代码 但它只是自动触发，而不是在上下文中指定的 ID 的 DIV 处触发：

jQuery(document).ready(function($) {

    $("#smooth-logo").waypoint(function(direction) {
    var $target = $( '#targetPoint' );
    if (direction === 'down' && $target ){
        $(".fadeMe").addClass("blur-in-fwd");
        $(".fadeMe").removeClass("blur-in-bkw");
        $("#smooth-logo").addClass("slideLeft");
        $("#smooth-logo").removeClass("slideRight");
        $("#animOut").get(0).beginElement(); // restart the animation
    } else if (direction === 'up') {  
        $(".fadeMe").addClass("blur-in-bkw");
        $(".fadeMe").removeClass("blur-in-fwd slide-right");
        $("#smooth-logo").addClass("slideRight");
        $("#smooth-logo").removeClass("slideLeft");
        $("#animIn").get(0).beginElement(); // restart the animation
    }
}, 

{ offset: '0%', context: 'body' });


 });

我这里有一个例子URL：https://stable.stable-demos.com/quip/

Answer 1

没有对我的理论进行任何测试，在我看来，您遇到的问题与 context 的默认值有关，即 window。

http://imakewebthings.com/waypoints/api/context-option/

你说的offset肯定是可以调整的，不过如果我说得对，是20%还是20px都无所谓，看来你的问题在于您正在定义 window context 而不是其他元素的偏移量。

如果您尝试将 context 定义为 body 元素会怎样？

类似于：

jQuery(document).ready(function($) {

    // Smooth OUT
    $('#smooth-logo').waypoint(function(direction) {

        if (direction === 'down') {

            $('.fadeMe').addClass('blur-in-fwd');
            $('.fadeMe').removeClass('blur-in-bkw');
            $('#smooth-logo').addClass('slideLeft');
            $('#smooth-logo').removeClass('slideRight');
            $('#animOut').get(0).beginElement(); // restart the animation

        } else if (direction === 'up') {  

            $('.fadeMe').addClass('blur-in-bkw');
            $('.fadeMe').removeClass('blur-in-fwd slide-right');
            $('#smooth-logo').addClass('slideRight');
            $('#smooth-logo').removeClass('slideLeft');
            $('#animIn').get(0).beginElement(); // restart the animation
        }
    }, 

    // { offset: '0%' });
    { offset: '0%', context: 'body' });

});

抱歉，我没有看到 link 悬停的错误，因此无法为您提供有关该错误的线索。

Answer 2

下面的工作代码段，是您想要的吗？基本上你不需要指定 #smooth-logo 航路点，因为它是动画的一部分，而徽标本身在你滚动页面时始终保持固定在同一位置，你需要指定的只是目标点和当它到达它时，动画将运行（我放了一个 console.log() 来通知目标何时到达）：

$(function() {
    $('#targetPoint').waypoint(function(direction) {
    console.log('waypoint reached!');
   
    // Target this element and run the up or down animation respectively
  
  if (direction === 'down') {
   $(".fadeMe").addClass("blur-in-fwd");
   $(".fadeMe").removeClass("blur-in-bkw");
   $("#smooth-logo").addClass("slideLeft");
   $("#smooth-logo").removeClass("slideRight");
   $("#animOut").get(0).beginElement(); // restart the animation
  } else if (direction === 'up') {  
   $(".fadeMe").addClass("blur-in-bkw");
   $(".fadeMe").removeClass("blur-in-fwd slide-right");
   $("#smooth-logo").addClass("slideRight");
   $("#smooth-logo").removeClass("slideLeft");
   $("#animIn").get(0).beginElement(); // restart the animation
  }
 }, 
  
 { offset: "0%" })
  
});

.header {
  min-height: 2000px;
  position: relative;
}

#smooth-logo {
  position: fixed;
}

/* PRIMARY LOAD ANIMATION */
.dropInAll {
  animation: drop 0.5s alternate;
  opacity: 0;
  animation-fill-mode:forwards;
}
.dropIn1 {
  animation-delay: 0.4s;
}
.dropIn2 {
  animation-delay: 0.5s;
}
.dropIn3 {
  animation-delay: 0.6s;
}

/* Slide Letters */
.slideAll {
  position: relative;
  animation: slideThis 5s alternate;
  animation-duration: 0.5s;
  opacity: 0;
  animation-fill-mode:forwards;
}
@keyframes slideThis {
    0% {opacity: 0.2;-webkit-transform: translateX(200px);}
    100% {opacity: 1;-webkit-transform: translateX(0px);}
}

/* S */
.bigS {
  animation-delay: 0.5s;
}
/* T */
.bigS1 {
  animation-delay: 0.6s;
}
/* A */
.bigS2 {
  animation: drop 0.5s ease-in-out, colorChange 5s ease-in 30s infinite;
  animation-delay: 1.2s;
}
@keyframes drop {
  0% {opacity: 0.2;transform: translateY(-100px);}
  100% {opacity: 1;transform: translateY(0px);}
}
@keyframes colorChange {

    0% { opacity: 1; fill: black; }
    20% { opacity: 1; fill: black; }
    50% { opacity: 1; fill: maroon; }
    100% { opacity: 1; fill: black; }
}

.bigS3 {
  animation-delay: 0.9s;
}
/* B */
.bigS4 {
  animation-delay: 1s;
}
/* L */
.bigS5 {
  animation-delay: 1.1s;
}
/* E */
.bigS6 {
  animation-delay: 1.2s;
}

/* SCROLLING ANIMATIONS */
.blur-in-fwd {
  filter: url(#filt-blur-out);
}
.blur-in-bkw {
  filter: url(#filt-blur-in);
}

/* Slide Animations */
.slideLeft {
  -webkit-animation: slide-left .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation: slide-left .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation-delay: 1.8s;
}
#filt-blur-in {
  animation-delay: 2s!important;
}
@keyframes slide-left {
  0% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
  100% {
    -webkit-transform: translateX(-200px);
            transform: translateX(-200px);
  }
}
.slideRight {
  -webkit-animation: slide-right .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
          animation: slide-right .5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
}
@keyframes slide-right {
  0% {
    -webkit-transform: translateX(-200px);
            transform: translateX(-200px);
  }
  100% {
    -webkit-transform: translateX(0px);
            transform: translateX(0px);
  }
}


/* SCROLLING ANIMATIONS */
@keyframes text-blur-out {
  0% {
    -webkit-filter: blur(0.01);
            filter: blur(0.01);
  }
  100% {
    -webkit-filter: blur(12px) opacity(0%);
            filter: blur(12px) opacity(0%);
  }
}
@keyframes text-blur-in {
  0% {
    -webkit-filter: blur(12px) opacity(0%);
            filter: blur(12px) opacity(0%);
  }
  100% {

    -webkit-filter: blur(0.01);
            filter: blur(0.01);
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/waypoints/4.0.1/jquery.waypoints.min.js"></script>
<link href="smooth.css" rel="stylesheet" type="text/css">

<header class="header">
<div id="smooth-logo">
 <svg data-name="big-s" xmlns="http://www.w3.org/2000/svg" width="6in" height="2in" viewBox="0 0 2036.7197 612">
  <title>Stable Smooth Logo</title>

  <!-- small the -->
  <polygon id="dropIn1" class="dropIn1 dropInAll" points="150.137 367.127 137.813 367.127 137.813 443.443 150.137 443.443 150.137 411.917 234.251 411.917 234.251 398.656 150.137 398.656 150.137 367.127"/>

  <polygon id="dropIn2" class="dropIn2 dropInAll" points="137.813 282.344 179.534 282.344 179.534 334.01 137.813 334.01 137.813 347.139 234.251 347.139 234.251 334.01 191.992 334.01 191.992 282.344 234.251 282.344 234.251 269.212 137.813 269.212 137.813 282.344"/>

  <polygon id="dropIn3" class="dropIn3 dropInAll" points="222.066 172.104 222.066 229.389 191.725 229.389 191.725 181.212 179.534 181.212 179.534 229.389 150.004 229.389 150.004 172.104 137.813 172.104 137.813 242.518 234.251 242.518 234.251 172.104 222.066 172.104"/>


  <!-- BIG S -->
  <path id="bigS" class="fadeMe bigS slideAll" d="M362.2168,367.2317c23.8106,16.6907,51.0516,32.82,83.83,32.82,32.1888,0,56.8072-10.392,56.8072-33.4934,0-22.7209-10.6044-34.0863-70.4407-43.93-59.8364-10.6044-89.757-33.7058-89.757-78.3966,0-46.9588,39.96-79.6635,99.4161-79.6635,36.6579,0,63.8458,7.9425,97.4489,28.7153l-18.0235,37.88c-33.9085-17.7179-47.9607-24.0272-78.4851-24.0272-30.6717,0-49.227,14.75-49.227,35.9591,0,19.3162,10.6044,28.7841,67.4117,38.6325,65.1385,10.98,93.5422,35.2179,93.5422,81.8012,0,49.6124-39.7691,83.9606-109.8293,83.9606-38.3944,0-79.8883-17.5373-102.94-38.04Z"/>
  <!-- Big S Blur Animation -->
  <defs>

    <!-- BLUR IN -->
       <filter id="filt-blur-out" x="-50%" y="-50%" width="200%" height="200%">
         <feGaussianBlur in="SourceGraphic" stdDeviation="0" result="blurpart">
           <animate id="animOut"
                    attributeName="stdDeviation" from="0" to="50" dur="1.2s" fill="freeze" begin="indefinite"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feGaussianBlur>
         <feFlood flood-color="white" flood-opacity="1" result="alphapart">
           <animate attributeName="flood-opacity" from="1" to="0" dur="1.2s" fill="freeze" begin="animOut.begin"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feFlood>
         <feComposite in="blurpart" in2="alphapart" operator="in"/>
       </filter>
       
       <!-- BLUR OUT -->
       <filter id="filt-blur-in" x="-50%" y="-50%" width="200%" height="200%">
         <feGaussianBlur in="SourceGraphic" stdDeviation="50" result="blurpart">
           <animate id="animIn"
                    attributeName="stdDeviation" from="50" to="0" dur="1.2s" fill="freeze" begin="indefinite"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530" />
         </feGaussianBlur>
         <feFlood flood-color="white" flood-opacity="0" result="alphapart">
           <animate attributeName="flood-opacity" from="0" to="1" fill="freeze" dur="1.2s" begin="animIn.begin"
                    calcMode="spline" keyTimes="0; 1" keySplines="0.550 0.085 0.680 0.530"/>
         </feFlood>
         <feComposite in="blurpart" in2="alphapart" operator="in"/>
       </filter>
     </defs>


  <!-- BIG T -->
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<div id="targetPoint" style="color: red;">Run the Fade Out and Slide Left Animation!</div>
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有没有办法在 WayPoints 中说出实际网站顶部与浏览器当前顶部的偏移量 window？

Is there a way to in WayPoints to say offset from actual website top vs the current top of the browser window?

jquery

jquery-waypoints

waypoint