javascript - 在多步骤表单中单击上一步时 CSS 发生变化

Question

我正在使用Django开发一个电子商务网站，并部署在sby.delhinerds.com上。在此页面上:http://sby.delhinerds.com/products/shirts-1/ ，我需要一个多步骤表单，用户可以在其中选择他/她的定制并继续进一步定制。

虽然，图像选择和下一个按钮工作正常，但是当我单击“上一个按钮”时，CSS或Javascript改变并且设计被破坏。我一直在努力让它正常工作，但没有运气。请帮忙。

谢谢。

重现错误的步骤:
1. 前往http://sby.delhinerds.com/products/shirts-1/
2. 单击任意图像并选择它
3.点击下一步
4.下一步，点击上一步，CSS或JS发生巨大变化。

我的 HTML、CSS 和 Javascript/jQuery 是

   
		$('.images_list li').click(function() {
			$('.images_list .selected').removeClass('selected');
			$(this).toggleClass('selected');
			var clicked = $(this).attr('title');
			$("#"+clicked).removeClass("hidden").siblings().addClass("hidden");
		});
    
 
//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: 500,
		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: 0,
		complete: function(){
			current_fs.hide();
			animating = false;
		},
		//this comes from the custom easing plugin
		easing: 'easeInOutBack'
	});
});

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

#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: black;
	text-transform: uppercase;
	font-size: 9px;
	width: 100px;
	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;
}

.images_list li {
				list-style: none;
				float: left;
				margin-right: 10px;
			}

		.images_list li span {
		  display:none;
			position:absolute;
		  top:150px;
		  left:30px;
			width:24px;
			height:24px;
		}
		.border {
			border: 0;
			background: url(upload/check.jpg);
		}
		.selected {
			border: 3px solid pink;
		  position:relative;
			width:200px;
		}
		.hidden {
		    display:none;
		}
		.images_list li.selected span {
		    display:block;
		}

<div style="width:500px;">

<!-- multistep form -->
<form id="msform">
<!-- progressbar -->
<ul id="progressbar" style="width:1000px;">
<li class="active">Fabric</li>
<li>Collars</li>
<li>Cuffs</li>
<li>Back</li>
<li>Front</li>
</ul>
<!-- fieldsets -->
<fieldset style="width:1000px;">
<div class="images_list">
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
</div>
<br><br><br><br><br><br><br><br><br><br><br>
<input type="button" name="next" class="next action-button" value="Next" />
</fieldset>
<fieldset style="width:1000px;">
<div class="images_list">
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
</div>
<br><br><br><br><br><br><br><br><br><br><br>
<input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="button" name="next" class="next action-button" value="Next" />
</fieldset>
<fieldset style="width:1000px;">
<div class="images_list">
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
</div>
<br><br><br><br><br><br><br><br><br><br><br>
<input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="button" name="next" class="next action-button" value="Next" />
</fieldset>
<fieldset style="width:1000px;">
<div class="images_list">
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
</div>
<br><br><br><br><br><br><br><br><br><br><br>
<input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="button" name="next" class="next action-button" value="Next" />
</fieldset>
<fieldset style="width:1000px;">
<div class="images_list">
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_1">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/1.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
<li class="border" title="content_2">
<img class="selectables" src="{% static "images/collar/2.png" %}"  />
<span>
<img src="{% static "images/select_itm.png" %}" />
</span>
</li>
</div>
<br><br><br><br><br><br><br><br><br><br><br>
<input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="button" name="next" class="next action-button" value="Next" />
</fieldset>
</form>

</div>
<div class="row">

<div class="col-md-12">
<div class="color_size top_border_with_pad">
<div class="col-md-6 col-sm-6 col-xs-12 ">
<div class="product_color">
<span>color</span>
<div class="sorting margin-left-15">
<label>
<select>
<option selected>- Select color - </option>
<option>Yellow</option>
<option>Black</option>
</select>
</label>
</div>
<span>measurements</span>
<div class="sorting margin-left-15">
<label>
<select>
<option selected>- Select color - </option>
<option>Yellow</option>
<option>Black</option>
</select>
</label>
</div>
</div>

</div>


<div class="col-md-6 col-sm-6 col-xs-12 no-padding-right">
<div class="product_size floatright">
<span>Size</span>
<div class="sorting margin-left-15">
<label>
<select>
<option selected>- Select dize - </option>
<option>40</option>
<option>50</option>
</select>
</label>
</div>
<span>Appoinment date</span>
<div class="sorting margin-left-15">
<label>
<select>
<option selected>- Select dize - </option>
<option>40</option>
<option>50</option>
</select>
</label>
</div>
</div>
</div>

Answer 1

为此属性应用之前的函数position:relative

previous_fs.css({'transform': 'scale('+scale+')', 'position':'relative','opacity': opacity});