javascript - jQuery 动画第二次不起作用

Question

为什么在 THIS CODE如果您第一次按右下角的“I”按钮有效，但第二次它只显示粉红色背景？

(function(){
  'use strict';

  var $mainButton = $(".main-button"),
      $closeButton = $(".close-button"),
      $buttonWrapper = $(".button-wrapper"),
      $ripple = $(".ripple"),
      $layer = $(".layered-content");

  $mainButton.on("click", function(){
    $ripple.addClass("rippling");
    $buttonWrapper.addClass("clicked").delay(1500).queue(function(){
      $layer.addClass("active");
    });
  });

  $closeButton.on("click", function(){
    $buttonWrapper.removeClass("clicked");
    $ripple.removeClass("rippling");
    $layer.removeClass("active");
  });

})();

@import url(http://fonts.googleapis.com/css?family=Roboto:400,300);

html {
  height: 100%;
}

body {
  background: url("http://species-in-pieces.com/img/bg/grad-bg.png") no-repeat center center/cover #F9D8AD;
  height: 100%;
}

button:focus {
  outline: none;
}

button:hover {
  opacity: .8;
}

.fa {
  font-size: 20px;
}

.fa-info {
  color: white;
}

#container {
  width: 330px;
  height: 508px;
  max-width: 330px;
  background: white;
  position: relative;
  top: 50%;
  left: 50%;
  overflow: hidden;
  box-shadow: 0 5px 15px 0 rgba(0,0,0,0.25);
  transform: translate3d(-50%, -50%, 0);
}

h2 {
  padding: 20px;
  color: white;
  background: #3E4FB2;
  font-weight: 300;
  text-align: center;
  font-size: 18px;
  font-family: 'Roboto', sans-serif;
}

.detail {
  color: #777;
  padding: 20px;
  line-height: 1.5;
  font-family: 'Roboto', sans-serif;
}

.img-wrapper {
  padding: 0;
  position: relative;
}

.img-wrapper:after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(62, 79, 178, .25);
  width: 100%;
}

.img-wrapper img {
  width: 100%;
  height: 200px;
  -o-object-fit: cover;
  object-fit: cover;
  margin: 0;
  display: block;
  position: relative;
}

.button-wrapper {
  width: 50px;
  height: 100%;
  position: absolute;
  bottom: 0;
  right: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  right: 20px;
  bottom: 20px;
}

button {
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 1px 3px 0 rgba(0,0,0,0.4);
  z-index: 9;
  position: relative;
}

.main-button {
  background: #ff2670;
  -webkit-align-self: flex-end;
  -ms-flex-item-align: end;
  align-self: flex-end;
}

.ripple {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  border-radius: 50%;
  z-index: -9;
  background: transparent;
  border: 1px solid #ff2670;
  -webkit-transform: scale(.5);
  -ms-transform: scale(.5);
  transform: scale(.5);
  -webkit-transition: .3s all ease;
  transition: .3s all ease;
  opacity: 1;
}

.rippling {
  -webkit-animation: .3s rippling 1;
  animation: .3s rippling 1;
  -moz-animation: .3s rippling 1;
}

@-webkit-keyframes rippling {

  25% {
    -webkit-transform: scale(1.5);
    transform: scale(1.5);
    opacity: 1;
  }

  100% {
    -webkit-transform: scale(2);
    transform: scale(2);
    opacity: 0;
  }

}

@-moz-keyframes rippling {

  25% {
    -moz-transform: scale(1.5);
    transform: scale(1.5);
    opacity: 1;
  }

  100% {
    -moz-transform: scale(2);
    transform: scale(2);
    opacity: 0;
  }

}

@keyframes rippling {

  25% {
    transform: scale(1.5);
    opacity: 1;
  }

  100% {
    transform: scale(2);
    opacity: 0;
  }

}

.layer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 50px;
  height: 50px;
  background: #ff2670;
  border-radius: 50%;
  z-index: -99;
  pointer-events: none;
}

.button-wrapper.clicked {
  -webkit-transform: rotate(90deg) translateY(-96px);
  -ms-transform: rotate(90deg) translateY(-96px);
  transform: rotate(90deg) translateY(-96px);
  right: 0;
  bottom: 0;
  -webkit-transition: .3s all ease .6s;
  transition: .3s all ease .6s;
}

.button-wrapper.clicked .main-button {
  opacity: 0;
  -webkit-transition: .3s all ease .3s;
  transition: .3s all ease .3s;
}

.button-wrapper.clicked .layer {
  -webkit-transform: scale(100);
  -ms-transform: scale(100);
  transform: scale(100);
  -webkit-transition: 2.25s all ease .9s;
  transition: 2.25s all ease .9s;
}

.layered-content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  opacity: 0;
}

.layered-content.active {
  opacity: 1;
}

.close-button {
  background: white;
  position: absolute;
  right: 20px;
  top: 20px;
  color: #ff2670;
}

.layered-content.active .close-button {
  -webkit-animation: .5s bounceIn;
  animation: .5s bounceIn;
}

.layered-content .content img {
  width: 80px;
  -webkit-shape-outside: 80px;
  shape-outside: 80px;
  border-radius: 50%;
  display: block;
  margin: 0 auto 15px;
  padding: 10px;
  box-sizing: border-box;
  background: white;
  box-shadow: 0 1px 3px 0 rgba(0,0,0,0.4);
  -webkit-transition: .3s all ease;
  transition: .3s all ease;
}

.content p {
  color: white;
  font-weight: 300;
  text-align: center;
  line-height: 1.5;
  font-family: 'Roboto', sans-serif;
}

.content p a {
  font-size: 12px;
  background: white;
  padding: 2.5px 5px;
  color: #ff2670;;
  text-decoration: none;
  border-radius: 50px;
  display: inline-block;
  margin-left: 1.5px;
}

.content img,
.content p {
  opacity: 0;
  position: relative;
  top: -7.5px;
}

.layered-content.active .content img {
  opacity: 1;
  top: 0;
  -webkit-transition: .5s all ease .5s;
  transition: .5s all ease .5s;
}

.layered-content.active .content p {
  opacity: 1;
  top: 0;
  -webkit-transition: .5s all ease 1s;
  transition: .5s all ease 1s;
}

.copyright {
  position: fixed;
  right: 15px;
  bottom: 15px;
  font-family: "Roboto";
}
.copyright span {
  line-height: 36px;
  color: rgba(255, 255, 255, 0.75);
  margin-right: 10px;
  font-weight: 300;
}
.copyright span a {
  font-weight: 400;
  text-decoration: none;
  color: #ea4c89;
}
.copyright .balapa {
  width: 30px;
  height: 30px;
  display: block;
  background: url("//s3-us-west-2.amazonaws.com/s.cdpn.io/111167/profile/profile-80_3.jpg");
  background-size: cover;
  border-radius: 50%;
  border: 5px solid rgba(255, 255, 255, 0.75);
  float: right;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<main id="container">
  <h2>Material Overlay Animation</h2>
  <div class="img-wrapper">
    <img src="https://d13yacurqjgara.cloudfront.net/users/2733/screenshots/741958/dribbble-foxes.jpg" alt="Just Background">
  </div>
  <p class="detail">Click the Button to see the "Material Animation". Works great on modern browser.</p>

  <div class="button-wrapper">
    <div class="layer"></div>
    <button class="main-button fa fa-info">
      <div class="ripple"></div>
    </button>
  </div>

  <div class="layered-content">
    <button class="close-button fa fa-times"></button>
    <div class="content">
      <img src="https://d13yacurqjgara.cloudfront.net/users/332135/avatars/normal/52d614ee44e3e21d2b73894c465773d7.png" alt="Balapa">
      <p>Crafted by balapa.</p>
      <p>See also my <a href="http://codepen.io/balapa/details/gbQbXR/">other pen</a></p>
    </div>
  </div>
</main>
<div class="copyright"><span>Material Overlay Animation by</span><a href="http://dribbble.com/balapa" class="balapa"></a></div>

Answer 1

您必须使用 clearQueue() 函数清除队列。

将你的代码改成这样

...
    $buttonWrapper.addClass("clicked").clearQueue().delay(1500).queue(function(){
            $layer.addClass("active");
        });
    });
...

或者您甚至可以这样做，这是 jQuery 文档中建议的一种方式。

$buttonWrapper.addClass("clicked").delay(1500).queue(function(){
            $layer.addClass("active");
            jQuery.dequeue( this );
        });
    });

重要部分直接来自 jQuery 文档，

Note that when adding a function with jQuery.queue(), we should ensure that jQuery.dequeue() is eventually called so that the next function in line executes.