根据点按两次按钮显示和隐藏选择框

Question

我有四个选择框，默认情况下我会显示其中一个。在第一个下面有2个链接，一个说添加一个位置，另一个说删除一个位置。

基本上我正在做的是将选择框包装在div标签内，当再添加一个时，单击我显示另一个位置，并在单击删除位置时隐藏该位置。

我也有4个选择框的限制，所以当达到4个选项时，它会显示一个警告，当3个被删除时，它会显示一个警告，说明需要一个

我面临的问题是，一旦页面显示我只需点击一下就可以添加一个位置，但是当点击删除时，它不会隐藏，直到2次点击，然后再打开如果我再添加一个我点击两次。感谢

这是我的代码

var i = 2;
$(".addonemore").click(function(){
    if( i > 4){
        alert("You can add only a maximum of 4 locations");
    } else {
        $('.location-'+i).css({'display':'table'});
        i++;
    }
});
$(".rmone").click(function(){
    if( i < 2){
        alert("You need at least one location and color");
    } else {
        $('.location-'+i).css({'display':'none'});
        i--;
    }
});

.pc-row {width: 100%; display: table; table-layout: fixed; }.pc-col {display:table-cell;vertical-align:top}
.location-2,.location-3,.location-4{display:none}.quote-sizes select{border:1px solid #ccc;font-size:14px;height:30px;padding:0 5px}
.quote-sizes label {cursor:inherit;display:block;width:100%;overflow:hidden;white-space:nowrap;margin-bottom:10px}.quote-sizes label span{font-size:14px;text-align:right;float:left;margin-right:3px;vertical-align:middle;width:120px}
#add-location,#rm-location{margin:20px 0;width:160px;float:left}#add-location a,#rm-location a{text-decoration:none;color:#000;border:2px solid #990000;font-size:13px;padding:5px}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="adult-sizes-box">
	<h2 class="section-title">3. Design Location & Colors</h2>
	<p class="ptext">You can select maximum 4 locations per shirt and Each location can have a maximum 4 colors. The base price includes the First Location and One color</p>
	<div class="pc-row location-1">
	<div class="locations-colors pc-col quote-sizes">
	  <h4>Choose location below</h4>
	   <label for="location_one"><span>Location</span>
	    <select name="location_one" id="location_one" class="linked-drop-down">
         <option value="">choose location</option>
		 <option value="Full_Chest">Full Chest</option>
		 <option value="Full_Back">Full Back</option>
         <option value="Front_Left_Chest">Front Left Chest</option>
         <option value="Front_Right_Chest">Front Right Chest</option>
         <option value="Left_Sleeve">Left Sleeve</option>
		 <option value="Right_Sleeve">Right Sleeve</option>		 
        </select></label>
		
	</div>
	</div>
	<div class="pc-row location-2">
		<div class="locations-colors pc-col quote-sizes">
	   <label for="location_two"><span>Location</span>
	    <select name="location_two" id="location_two" class="linked-drop-down">
         <option value="">choose location</option>
		 <option value="Full_Chest">Full Chest</option>
		 <option value="Full_Back">Full Back</option>
         <option value="Front_Left_Chest">Front Left Chest</option>
         <option value="Front_Right_Chest">Front Right Chest</option>
         <option value="Left_Sleeve">Left Sleeve</option>
		 <option value="Right_Sleeve">Right Sleeve</option>		 
        </select></label>
		
	</div>
	</div>
		<div class="pc-row location-3">
		<div class="locations-colors pc-col quote-sizes">
	   <label for="location_three"><span>Location</span>
	    <select name="location_three" id="location_three" class="linked-drop-down">
         <option value="">choose location</option>
		 <option value="Full_Chest">Full Chest</option>
		 <option value="Full_Back">Full Back</option>
         <option value="Front_Left_Chest">Front Left Chest</option>
         <option value="Front_Right_Chest">Front Right Chest</option>
         <option value="Left_Sleeve">Left Sleeve</option>
		 <option value="Right_Sleeve">Right Sleeve</option>		 
        </select></label>
		
	</div>
	</div>
		<div class="pc-row location-4">
		<div class="locations-colors pc-col quote-sizes">
	   <label for="locatio_four"><span>Location</span>
	    <select name="location_four" id="location_four" class="linked-drop-down">
         <option value="">choose location</option>
		 <option value="Full_Chest">Full Chest</option>
		 <option value="Full_Back">Full Back</option>
         <option value="Front_Left_Chest">Front Left Chest</option>
         <option value="Front_Right_Chest">Front Right Chest</option>
         <option value="Left_Sleeve">Left Sleeve</option>
		 <option value="Right_Sleeve">Right Sleeve</option>		 
        </select></label>
		
	</div>
	</div><br />
  <div class="pc-row">
  <div class="pc-col">
  	<div id="add-location"><a href="javascript:void(0);" class="addonemore">Add one more location</a></div>
    	<div id="rm-location"><a href="javascript:void(0);" class="rmone">Remove one location</a></div>
  </div>
 </div>
	</div>

Answer 1

这可能是因为我从2开始，尝试用1初始化它，因为最初只能看到一个选择并在显示div之前递增它。

var i = 1;
$(".addonemore").click(function(){
  if( i > 4){
      alert("You can add only a maximum of 4 locations");
  } else {
      i++;
      $('.location-'+i).css({'display':'table'});
  }
});
$(".rmone").click(function(){
  if( i < 2){
      alert("You need at least one location and color");
  } else {
      $('.location-'+i).css({'display':'none'});
      i--;
  }
});

Answer 2

问题是你的添加和删除功能需要对不同的元素进行操作。通过@DanPhilip建议将graph <- dygraph(values)初始化为1并更改add函数所依据的元素，您可以获得正确的行为。

这是一个有效的解决方案：

i

var i = 1;
$(".addonemore").click(function(){
	if( i > 3){alert("You can add only a maximum of 4 locations");}else{
		$('.location-'+ ++i).css({'display':'table'});
	}
});
$(".rmone").click(function(){
	if( i < 2){alert("You need at least one location and color");}else{
		$('.location-'+i).css({'display':'none'}).find("option[value='']").attr({'selected':'selected'});
		i--;
	}
});

.pc-row {width: 100%; display: table; table-layout: fixed; }.pc-col {display:table-cell;vertical-align:top}
.location-2,.location-3,.location-4{display:none}.quote-sizes select{border:1px solid #ccc;font-size:14px;height:30px;padding:0 5px}
.quote-sizes label {cursor:inherit;display:block;width:100%;overflow:hidden;white-space:nowrap;margin-bottom:10px}.quote-sizes label span{font-size:14px;text-align:right;float:left;margin-right:3px;vertical-align:middle;width:120px}
#add-location,#rm-location{margin:20px 0;width:160px;float:left}#add-location a,#rm-location a{text-decoration:none;color:#000;border:2px solid #990000;font-size:13px;padding:5px}

编辑：修改了JavaScript，以便在隐藏时将<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div class="adult-sizes-box"> <h2 class="section-title">3. Design Location & Colors</h2> <p class="ptext">You can select maximum 4 locations per shirt and Each location can have a maximum 4 colors. The base price includes the First Location and One color</p> <div class="pc-row location-1"> <div class="locations-colors pc-col quote-sizes"> <h4>Choose location below</h4> <label for="location_one"><span>Location</span> <select name="location_one" id="location_one" class="linked-drop-down"> <option value="">choose location</option> <option value="Full_Chest">Full Chest</option> <option value="Full_Back">Full Back</option> <option value="Front_Left_Chest">Front Left Chest</option> <option value="Front_Right_Chest">Front Right Chest</option> <option value="Left_Sleeve">Left Sleeve</option> <option value="Right_Sleeve">Right Sleeve</option> </select></label> </div> </div> <div class="pc-row location-2"> <div class="locations-colors pc-col quote-sizes"> <label for="location_two"><span>Location</span> <select name="location_two" id="location_two" class="linked-drop-down"> <option value="">choose location</option> <option value="Full_Chest">Full Chest</option> <option value="Full_Back">Full Back</option> <option value="Front_Left_Chest">Front Left Chest</option> <option value="Front_Right_Chest">Front Right Chest</option> <option value="Left_Sleeve">Left Sleeve</option> <option value="Right_Sleeve">Right Sleeve</option> </select></label> </div> </div> <div class="pc-row location-3"> <div class="locations-colors pc-col quote-sizes"> <label for="location_three"><span>Location</span> <select name="location_three" id="location_three" class="linked-drop-down"> <option value="">choose location</option> <option value="Full_Chest">Full Chest</option> <option value="Full_Back">Full Back</option> <option value="Front_Left_Chest">Front Left Chest</option> <option value="Front_Right_Chest">Front Right Chest</option> <option value="Left_Sleeve">Left Sleeve</option> <option value="Right_Sleeve">Right Sleeve</option> </select></label> </div> </div> <div class="pc-row location-4"> <div class="locations-colors pc-col quote-sizes"> <label for="locatio_four"><span>Location</span> <select name="location_four" id="location_four" class="linked-drop-down"> <option value="">choose location</option> <option value="Full_Chest">Full Chest</option> <option value="Full_Back">Full Back</option> <option value="Front_Left_Chest">Front Left Chest</option> <option value="Front_Right_Chest">Front Right Chest</option> <option value="Left_Sleeve">Left Sleeve</option> <option value="Right_Sleeve">Right Sleeve</option> </select></label> </div> </div><br /> <div class="pc-row"> <div class="pc-col"> <div id="add-location"><a href="javascript:void(0);" class="addonemore">Add one more location</a></div> <div id="rm-location"><a href="javascript:void(0);" class="rmone">Remove one location</a></div> </div> </div> </div>元素恢复为默认选择。

Answer 3

有两个问题。首先，您应该删除具有索引的元素 - 1而不是元素索引。其次，删除限制应为＆lt; = 2.像这样：

＆＃13;

＆＃13;

var i = 2;
$(".addonemore").click(function(){
    if( i > 4){
        alert("You can add only a maximum of 4 locations");
    } else {
        $('.location-'+i).css({'display':'table'});
        i++;
    }
});
$(".rmone").click(function(){
    if( i <= 2){
        alert("You need at least one location and color");
    } else {
        $('.location-'+(i-1)).css({'display':'none'});
        i--;
    }
});

＆＃13;

.pc-row {width: 100%; display: table; table-layout: fixed; }.pc-col {display:table-cell;vertical-align:top}
.location-2,.location-3,.location-4{display:none}.quote-sizes select{border:1px solid #ccc;font-size:14px;height:30px;padding:0 5px}
.quote-sizes label {cursor:inherit;display:block;width:100%;overflow:hidden;white-space:nowrap;margin-bottom:10px}.quote-sizes label span{font-size:14px;text-align:right;float:left;margin-right:3px;vertical-align:middle;width:120px}
#add-location,#rm-location{margin:20px 0;width:160px;float:left}#add-location a,#rm-location a{text-decoration:none;color:#000;border:2px solid #990000;font-size:13px;padding:5px}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="adult-sizes-box">
<h2 class="section-title">3. Design Location & Colors</h2>
<p class="ptext">You can select maximum 4 locations per shirt and Each location can have a maximum 4 colors. The base price includes the First Location and One color</p>
<div class="pc-row location-1">
<div class="locations-colors pc-col quote-sizes">
  <h4>Choose location below</h4>
   <label for="location_one"><span>Location</span>
    <select name="location_one" id="location_one" class="linked-drop-down">
     <option value="">choose location</option>
	 <option value="Full_Chest">Full Chest</option>
	 <option value="Full_Back">Full Back</option>
     <option value="Front_Left_Chest">Front Left Chest</option>
     <option value="Front_Right_Chest">Front Right Chest</option>
     <option value="Left_Sleeve">Left Sleeve</option>
	 <option value="Right_Sleeve">Right Sleeve</option>		 
    </select></label>
	
</div>
</div>
<div class="pc-row location-2">
	<div class="locations-colors pc-col quote-sizes">
   <label for="location_two"><span>Location</span>
    <select name="location_two" id="location_two" class="linked-drop-down">
     <option value="">choose location</option>
	 <option value="Full_Chest">Full Chest</option>
	 <option value="Full_Back">Full Back</option>
     <option value="Front_Left_Chest">Front Left Chest</option>
     <option value="Front_Right_Chest">Front Right Chest</option>
     <option value="Left_Sleeve">Left Sleeve</option>
	 <option value="Right_Sleeve">Right Sleeve</option>		 
    </select></label>
	
</div>
</div>
	<div class="pc-row location-3">
	<div class="locations-colors pc-col quote-sizes">
   <label for="location_three"><span>Location</span>
    <select name="location_three" id="location_three" class="linked-drop-down">
     <option value="">choose location</option>
	 <option value="Full_Chest">Full Chest</option>
	 <option value="Full_Back">Full Back</option>
     <option value="Front_Left_Chest">Front Left Chest</option>
     <option value="Front_Right_Chest">Front Right Chest</option>
     <option value="Left_Sleeve">Left Sleeve</option>
	 <option value="Right_Sleeve">Right Sleeve</option>		 
    </select></label>
	
</div>
</div>
	<div class="pc-row location-4">
	<div class="locations-colors pc-col quote-sizes">
   <label for="locatio_four"><span>Location</span>
    <select name="location_four" id="location_four" class="linked-drop-down">
     <option value="">choose location</option>
	 <option value="Full_Chest">Full Chest</option>
	 <option value="Full_Back">Full Back</option>
     <option value="Front_Left_Chest">Front Left Chest</option>
     <option value="Front_Right_Chest">Front Right Chest</option>
     <option value="Left_Sleeve">Left Sleeve</option>
	 <option value="Right_Sleeve">Right Sleeve</option>		 
    </select></label>
	
</div>
</div><br />
  <div class="pc-row">
  <div class="pc-col">
  	<div id="add-location"><a href="javascript:void(0);" class="addonemore">Add one more location</a></div>
	<div id="rm-location"><a href="javascript:void(0);" class="rmone">Remove one location</a></div>
  </div>
 </div>
</div>

＆＃13;

＆＃13;

＆＃13;

JSFiddle：https://jsfiddle.net/haL32cbd/2/