即使单击了下一步按钮，我也无法移至下一页

Question

试图为保险公司制作表格。该表单是使用基本的HTML，CSS和JQuery构建的。单击“下一步”按钮后，我无法从首页移动，因此看不到其余的2个字段集。谁能指出错误在哪里？真的很有帮助。

//jQuery time
var current_fs, next_fs, previous_fs; //fieldsets
var left, opacity, scale; //fieldset properties which we will animate
var animating; //flag to prevent quick multi-click glitches

$(".next").click(function(){
  if(animating) return false;
  animating = true;

  current_fs = $(this).parent();
  next_fs = $(this).parent().next();

  //activate next step on progressbar using the index of next_fs
  $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");

  //show the next fieldset
  next_fs.show(); 
  //hide the current fieldset with style
  current_fs.animate({opacity: 0}, {
    step: function(now, mx) {
      //as the opacity of current_fs reduces to 0 - stored in "now"
      //1. scale current_fs down to 80%
      scale = 1 - (1 - now) * 0.2;
      //2. bring next_fs from the right(50%)
      left = (now * 50)+"%";
      //3. increase opacity of next_fs to 1 as it moves in
      opacity = 1 - now;
      current_fs.css({
        'transform': 'scale('+scale+')',
        'position': 'absolute'
      });
      next_fs.css({'left': left, 'opacity': opacity});
    }, 
    duration: 800, 
    complete: function(){
      current_fs.hide();
      animating = false;
    }, 
    //this comes from the custom easing plugin
    easing: 'easeInOutBack'
  });
});

$(".previous").click(function(){
  if(animating) return false;
  animating = true;

  current_fs = $(this).parent();
  previous_fs = $(this).parent().prev();

  //de-activate current step on progressbar
  $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");

  //show the previous fieldset
  previous_fs.show(); 
  //hide the current fieldset with style
  current_fs.animate({opacity: 0}, {
    step: function(now, mx) {
      //as the opacity of current_fs reduces to 0 - stored in "now"
      //1. scale previous_fs from 80% to 100%
      scale = 0.8 + (1 - now) * 0.2;
      //2. take current_fs to the right(50%) - from 0%
      left = ((1-now) * 50)+"%";
      //3. increase opacity of previous_fs to 1 as it moves in
      opacity = 1 - now;
      current_fs.css({'left': left});
      previous_fs.css({'transform': 'scale('+scale+')', 'opacity': opacity});
    }, 
    duration: 800, 
    complete: function(){
      current_fs.hide();
      animating = false;
    }, 
    //this comes from the custom easing plugin
    easing: 'easeInOutBack'
  });
});

$(".submit").click(function(){
  return false;
})

/*custom font*/
@import url(https://fonts.googleapis.com/css?family=Montserrat);

/*basic reset*/
* {margin: 0; padding: 0;}

html {
  height: 100%;
  /*Image only BG fallback*/

  /*background = gradient + image pattern combo*/
  background: 
    linear-gradient(rgba(196, 102, 0, 0.6), rgba(155, 89, 182, 0.6));
}

body {
  font-family: montserrat, arial, verdana;
}
/*form styles*/
#msform {
  width: 400px;
  margin: 50px auto;
  text-align: center;
  position: relative;
}
#msform fieldset {
  background: white;
  border: 0 none;
  border-radius: 3px;
  box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
  padding: 20px 30px;
  box-sizing: border-box;
  width: 80%;
  margin: 0 10%;

  /*stacking fieldsets above each other*/
  position: relative;
}
/*Hide all except first fieldset*/
#msform fieldset:not(:first-of-type) {
  display: none;
}
/*inputs*/
#msform input, #msform textarea {
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 3px;
  margin-bottom: 10px;
  width: 100%;
  box-sizing: border-box;
  font-family: montserrat;
  color: #2C3E50;
  font-size: 13px;
}
/*buttons*/
#msform .action-button {
  width: 100px;
  background: #27AE60;
  font-weight: bold;
  color: white;
  border: 0 none;
  border-radius: 1px;
  cursor: pointer;
  padding: 10px 5px;
  margin: 10px 5px;
}
#msform .action-button:hover, #msform .action-button:focus {
  box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}
/*headings*/
.fs-title {
  font-size: 15px;
  text-transform: uppercase;
  color: #2C3E50;
  margin-bottom: 10px;
}
.fs-subtitle {
  font-weight: normal;
  font-size: 13px;
  color: #666;
  margin-bottom: 20px;
}
/*progressbar*/
#progressbar {
  margin-bottom: 30px;
  overflow: hidden;
  /*CSS counters to number the steps*/
  counter-reset: step;
}
#progressbar li {
  list-style-type: none;
  color: white;
  text-transform: uppercase;
  font-size: 9px;
  width: 33.33%;
  float: left;
  position: relative;
}
#progressbar li:before {
  content: counter(step);
  counter-increment: step;
  width: 20px;
  line-height: 20px;
  display: block;
  font-size: 10px;
  color: #333;
  background: white;
  border-radius: 3px;
  margin: 0 auto 5px auto;
}
/*progressbar connectors*/
#progressbar li:after {
  content: '';
  width: 100%;
  height: 2px;
  background: white;
  position: absolute;
  left: -50%;
  top: 9px;
  z-index: -1; /*put it behind the numbers*/
}
#progressbar li:first-child:after {
  /*connector not needed before the first step*/
  content: none; 
}
/*marking active/completed steps green*/
/*The number of the step and the connector before it = green*/
#progressbar li.active:before,  #progressbar li.active:after{
  background: #27AE60;
  color: white;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- multistep form -->
<form id="msform">
  <!-- progressbar -->
  <ul id="progressbar">
    <li class="active">Account Setup</li>
    <li>Social Profiles</li>
    <li>Personal Details</li>
  </ul>
  <!-- fieldsets -->
  <fieldset>
    <h2 class="fs-title">Create your account</h2>
    <h3 class="fs-subtitle">This is step 1</h3>
    <input type="text" name="email" placeholder="Email" />
    <input type="password" name="pass" placeholder="Password" />
    <input type="password" name="cpass" placeholder="Confirm Password" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset>
    <h2 class="fs-title">Social Profiles</h2>
    <h3 class="fs-subtitle">Your presence on the social network</h3>
    <input type="text" name="twitter" placeholder="Twitter" />
    <input type="text" name="facebook" placeholder="Facebook" />
    <input type="text" name="gplus" placeholder="Google Plus" />
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset>
    <h2 class="fs-title">Personal Details</h2>
    <h3 class="fs-subtitle">We will never sell it</h3>
    <input type="text" name="fname" placeholder="First Name" />
    <input type="text" name="lname" placeholder="Last Name" />
    <input type="text" name="phone" placeholder="Phone" />
    <textarea name="address" placeholder="Address"></textarea>
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="submit" name="submit" class="submit action-button" value="Submit" />
  </fieldset>
</form>

Answer 1

所以，我实现了一种逻辑（这不是最好的方法，总是有更好的方法），下面的代码就是结果。如果您愿意，可以使用console.log();进行净化。我从此示例中删除了您的动画处理，我认为这不是问题。

我所做的更改是在条形图（进度条）和fieldset上包含一些类。

如果有任何疑问，请在评论字段中询问。

let actual = 0;
let previous = 0;

$(".next").click(function(){
  if (actual == 0) {
    actual++;
    $('.stage' + actual).show();
    $('.stage' + previous).hide();
    $('.bar' + actual).addClass('active');
  } else {  
    previous = actual;
    actual++;
    $('.stage' + actual).show();
    $('.stage' + previous).hide();
    $('.bar' + actual).addClass('active');
  }
});

$(".previous").click(function(){
  if (previous == 0) {
    actual = previous;
    $('.stage' + actual).show();
    $('.stage' + (actual + 1)).hide();
    $('.bar' + (actual + 1)).removeClass('active');
  } else {
    actual = previous;
    previous--;
    $('.stage' + actual).show();
    $('.stage' + (actual + 1)).hide();
    $('.bar' + (actual + 1)).removeClass('active');
  }
});

/*custom font*/
@import url(https://fonts.googleapis.com/css?family=Montserrat);

/*basic reset*/
* {margin: 0; padding: 0;}

html {
  height: 100%;
  /*Image only BG fallback*/

  /*background = gradient + image pattern combo*/
  background: 
    linear-gradient(rgba(196, 102, 0, 0.6), rgba(155, 89, 182, 0.6));
}

body {
  font-family: montserrat, arial, verdana;
}
/*form styles*/
#msform {
  width: 400px;
  margin: 50px auto;
  text-align: center;
  position: relative;
}
#msform fieldset {
  background: white;
  border: 0 none;
  border-radius: 3px;
  box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
  padding: 20px 30px;
  box-sizing: border-box;
  width: 80%;
  margin: 0 10%;

  /*stacking fieldsets above each other*/
  position: relative;
}
/*Hide all except first fieldset*/
#msform fieldset:not(:first-of-type) {
  display: none;
}
/*inputs*/
#msform input, #msform textarea {
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 3px;
  margin-bottom: 10px;
  width: 100%;
  box-sizing: border-box;
  font-family: montserrat;
  color: #2C3E50;
  font-size: 13px;
}
/*buttons*/
#msform .action-button {
  width: 100px;
  background: #27AE60;
  font-weight: bold;
  color: white;
  border: 0 none;
  border-radius: 1px;
  cursor: pointer;
  padding: 10px 5px;
  margin: 10px 5px;
}
#msform .action-button:hover, #msform .action-button:focus {
  box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}
/*headings*/
.fs-title {
  font-size: 15px;
  text-transform: uppercase;
  color: #2C3E50;
  margin-bottom: 10px;
}
.fs-subtitle {
  font-weight: normal;
  font-size: 13px;
  color: #666;
  margin-bottom: 20px;
}
/*progressbar*/
#progressbar {
  margin-bottom: 30px;
  overflow: hidden;
  /*CSS counters to number the steps*/
  counter-reset: step;
}
#progressbar li {
  list-style-type: none;
  color: white;
  text-transform: uppercase;
  font-size: 9px;
  width: 33.33%;
  float: left;
  position: relative;
}
#progressbar li:before {
  content: counter(step);
  counter-increment: step;
  width: 20px;
  line-height: 20px;
  display: block;
  font-size: 10px;
  color: #333;
  background: white;
  border-radius: 3px;
  margin: 0 auto 5px auto;
}
/*progressbar connectors*/
#progressbar li:after {
  content: '';
  width: 100%;
  height: 2px;
  background: white;
  position: absolute;
  left: -50%;
  top: 9px;
  z-index: -1; /*put it behind the numbers*/
}
#progressbar li:first-child:after {
  /*connector not needed before the first step*/
  content: none; 
}
/*marking active/completed steps green*/
/*The number of the step and the connector before it = green*/
#progressbar li.active:before,  #progressbar li.active:after{
  background: #27AE60;
  color: white;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- multistep form -->
<form id="msform">
  <!-- progressbar -->
  <ul id="progressbar">
    <li class="bar0 active">Account Setup</li>
    <li class="bar1">Social Profiles</li>
    <li class="bar2">Personal Details</li>
  </ul>
  <!-- fieldsets -->
  <fieldset class="stage0">
    <h2 class="fs-title">Create your account</h2>
    <h3 class="fs-subtitle">This is step 1</h3>
    <input type="text" name="email" placeholder="Email" />
    <input type="password" name="pass" placeholder="Password" />
    <input type="password" name="cpass" placeholder="Confirm Password" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset class="stage1">
    <h2 class="fs-title">Social Profiles</h2>
    <h3 class="fs-subtitle">Your presence on the social network</h3>
    <input type="text" name="twitter" placeholder="Twitter" />
    <input type="text" name="facebook" placeholder="Facebook" />
    <input type="text" name="gplus" placeholder="Google Plus" />
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset class="stage2">
    <h2 class="fs-title">Personal Details</h2>
    <h3 class="fs-subtitle">We will never sell it</h3>
    <input type="text" name="fname" placeholder="First Name" />
    <input type="text" name="lname" placeholder="Last Name" />
    <input type="text" name="phone" placeholder="Phone" />
    <textarea name="address" placeholder="Address"></textarea>
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="submit" name="submit" class="submit action-button" value="Submit" />
  </fieldset>
</form>

Answer 2

您在评论中提到easeInOutBack缓动是自定义插件。我认为问题可能出在其中，因为它不包含在我无法测试或调试的问题中。但是，当我用默认的'easeInOutBack'替换'swing'时，它以我认为您打算的方式工作。

您确定正在加载自定义宽松代码吗？您是否在控制台中收到TypeError: n.easing[this.easing] is not a function这样的错误消息？如果是这样，则自定义缓动代码可能未加载到页面中。

如果它包含在页面中，则可能会出现错误消息，可能会向您指出正确的修复方法。

//jQuery time
var current_fs, next_fs, previous_fs; //fieldsets
var left, opacity, scale; //fieldset properties which we will animate
var animating; //flag to prevent quick multi-click glitches

$(".next").click(function(){
  if(animating) return false;
  animating = true;

  current_fs = $(this).parent();
  next_fs = $(this).parent().next();

  //activate next step on progressbar using the index of next_fs
  $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");

  //show the next fieldset
  next_fs.show(); 
  //hide the current fieldset with style
  current_fs.animate({opacity: 0}, {
    step: function(now, mx) {
      //as the opacity of current_fs reduces to 0 - stored in "now"
      //1. scale current_fs down to 80%
      scale = 1 - (1 - now) * 0.2;
      //2. bring next_fs from the right(50%)
      left = (now * 50)+"%";
      //3. increase opacity of next_fs to 1 as it moves in
      opacity = 1 - now;
      current_fs.css({
        'transform': 'scale('+scale+')',
        'position': 'absolute'
      });
      next_fs.css({'left': left, 'opacity': opacity});
    }, 
    duration: 800, 
    complete: function(){
      current_fs.hide();
      animating = false;
    }, 
    //this comes from the custom easing plugin
    easing: 'swing'
  });
});

$(".previous").click(function(){
  if(animating) return false;
  animating = true;

  current_fs = $(this).parent();
  previous_fs = $(this).parent().prev();

  //de-activate current step on progressbar
  $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");

  //show the previous fieldset
  previous_fs.show(); 
  //hide the current fieldset with style
  current_fs.animate({opacity: 0}, {
    step: function(now, mx) {
      //as the opacity of current_fs reduces to 0 - stored in "now"
      //1. scale previous_fs from 80% to 100%
      scale = 0.8 + (1 - now) * 0.2;
      //2. take current_fs to the right(50%) - from 0%
      left = ((1-now) * 50)+"%";
      //3. increase opacity of previous_fs to 1 as it moves in
      opacity = 1 - now;
      current_fs.css({'left': left});
      previous_fs.css({'transform': 'scale('+scale+')', 'opacity': opacity});
    }, 
    duration: 800, 
    complete: function(){
      current_fs.hide();
      animating = false;
    }, 
    //this comes from the custom easing plugin
    easing: 'swing'
  });
});

$(".submit").click(function(){
  return false;
})

/*custom font*/
@import url(https://fonts.googleapis.com/css?family=Montserrat);

/*basic reset*/
* {margin: 0; padding: 0;}

html {
  height: 100%;
  /*Image only BG fallback*/

  /*background = gradient + image pattern combo*/
  background: 
    linear-gradient(rgba(196, 102, 0, 0.6), rgba(155, 89, 182, 0.6));
}

body {
  font-family: montserrat, arial, verdana;
}
/*form styles*/
#msform {
  width: 400px;
  margin: 50px auto;
  text-align: center;
  position: relative;
}
#msform fieldset {
  background: white;
  border: 0 none;
  border-radius: 3px;
  box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
  padding: 20px 30px;
  box-sizing: border-box;
  width: 80%;
  margin: 0 10%;

  /*stacking fieldsets above each other*/
  position: relative;
}
/*Hide all except first fieldset*/
#msform fieldset:not(:first-of-type) {
  display: none;
}
/*inputs*/
#msform input, #msform textarea {
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 3px;
  margin-bottom: 10px;
  width: 100%;
  box-sizing: border-box;
  font-family: montserrat;
  color: #2C3E50;
  font-size: 13px;
}
/*buttons*/
#msform .action-button {
  width: 100px;
  background: #27AE60;
  font-weight: bold;
  color: white;
  border: 0 none;
  border-radius: 1px;
  cursor: pointer;
  padding: 10px 5px;
  margin: 10px 5px;
}
#msform .action-button:hover, #msform .action-button:focus {
  box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}
/*headings*/
.fs-title {
  font-size: 15px;
  text-transform: uppercase;
  color: #2C3E50;
  margin-bottom: 10px;
}
.fs-subtitle {
  font-weight: normal;
  font-size: 13px;
  color: #666;
  margin-bottom: 20px;
}
/*progressbar*/
#progressbar {
  margin-bottom: 30px;
  overflow: hidden;
  /*CSS counters to number the steps*/
  counter-reset: step;
}
#progressbar li {
  list-style-type: none;
  color: white;
  text-transform: uppercase;
  font-size: 9px;
  width: 33.33%;
  float: left;
  position: relative;
}
#progressbar li:before {
  content: counter(step);
  counter-increment: step;
  width: 20px;
  line-height: 20px;
  display: block;
  font-size: 10px;
  color: #333;
  background: white;
  border-radius: 3px;
  margin: 0 auto 5px auto;
}
/*progressbar connectors*/
#progressbar li:after {
  content: '';
  width: 100%;
  height: 2px;
  background: white;
  position: absolute;
  left: -50%;
  top: 9px;
  z-index: -1; /*put it behind the numbers*/
}
#progressbar li:first-child:after {
  /*connector not needed before the first step*/
  content: none; 
}
/*marking active/completed steps green*/
/*The number of the step and the connector before it = green*/
#progressbar li.active:before,  #progressbar li.active:after{
  background: #27AE60;
  color: white;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- multistep form -->
<form id="msform">
  <!-- progressbar -->
  <ul id="progressbar">
    <li class="active">Account Setup</li>
    <li>Social Profiles</li>
    <li>Personal Details</li>
  </ul>
  <!-- fieldsets -->
  <fieldset>
    <h2 class="fs-title">Create your account</h2>
    <h3 class="fs-subtitle">This is step 1</h3>
    <input type="text" name="email" placeholder="Email" />
    <input type="password" name="pass" placeholder="Password" />
    <input type="password" name="cpass" placeholder="Confirm Password" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset>
    <h2 class="fs-title">Social Profiles</h2>
    <h3 class="fs-subtitle">Your presence on the social network</h3>
    <input type="text" name="twitter" placeholder="Twitter" />
    <input type="text" name="facebook" placeholder="Facebook" />
    <input type="text" name="gplus" placeholder="Google Plus" />
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="button" name="next" class="next action-button" value="Next" />
  </fieldset>
  <fieldset>
    <h2 class="fs-title">Personal Details</h2>
    <h3 class="fs-subtitle">We will never sell it</h3>
    <input type="text" name="fname" placeholder="First Name" />
    <input type="text" name="lname" placeholder="Last Name" />
    <input type="text" name="phone" placeholder="Phone" />
    <textarea name="address" placeholder="Address"></textarea>
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="submit" name="submit" class="submit action-button" value="Submit" />
  </fieldset>
</form>