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Javascript 如何避免循环中的双重划分？

javascript html loops

Javascript 如何避免循环中的双重划分？,javascript,html,loops,divide,Javascript,Html,Loops,Divide,谢谢你的帮助 我的代码如下所示： var CatItems = ""; for(var x=0; x < data.PRODUCTS.length; x++) { if (x % 3 === 0) CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeho

谢谢你的帮助

我的代码如下所示：

var CatItems = "";

for(var x=0; x < data.PRODUCTS.length; x++) {
if (x % 3 === 0) CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">';
CatItems += '<div><a class="large_image" href="#"><img  src="'+ data.PRODUCTS[x].product_img +'" alt="' + data.PRODUCTS[x].product_name +'"></a><h3 class="geo_17_darkbrown">' + data.PRODUCTS[x].product_name +'</h3>';

if ( data.PRODUCTS[x].product_onsale==1 ) {
CatItems += '<img alt="sale" src="assets/images/sale.gif" class="sale"><span class="geo_17_red_linethr">&pound;'+ data.PRODUCTS[x].product_retailprice +'</span>&nbsp;&nbsp;<span class="price geo_17_darkbrown">&pound;'+ data.PRODUCTS[x].product_webprice +'</span>';
} else {
CatItems += '<span class="price geo_17_darkbrown">&pound;'+ data.PRODUCTS[x].product_webprice +'</span>';
}

if ( data.PRODUCTS[x].product_COLOURS ) {
CatItems += '<span class="colour">';

 for(var y=0; y < data.PRODUCTS[x].product_COLOURS.length; y++) {

CatItems += '<span><a href="'+ data.PRODUCTS[x].product_COLOURS[y].colours_large +'"><img src="'+ data.PRODUCTS[x].product_COLOURS[y].colours_thumb +'" alt="'+ data.PRODUCTS[x].product_COLOURS[y].colour_name +'" /></a></span>';
}

CatItems += '</span>';
}

CatItems += '</div>';

if (x % 3 === 2) CatItems += '</li>';


}

var-CatItems=”“；
对于（var x=0；x”；
CatItems+=''+数据。产品[x]。产品名称+''；
if（data.PRODUCTS[x].product_onsale==1）{
CatItems+='£；'+data.PRODUCTS[x]。product_retailprice+'£；'+data.PRODUCTS[x]。product_webprice+''；
}否则{
CatItems+='£；'+data.PRODUCTS[x].product_webprice+''；
}
if（data.PRODUCTS[x].产品颜色）{
CatItems+=''；
对于（var y=0；y'；
}
这就产生了：

<div class="carousel_00 jcarousel-container jcarousel-container-horizontal" style="position: relative; display: block;">            
  <div class="jcarousel-clip jcarousel-clip-horizontal" style="overflow: hidden; position: relative;">
    <ul class="jcarousel-list jcarousel-list-horizontal" style="overflow: hidden; position: relative; top: 0px; left: 0px; margin: 0px; padding: 0px; width: 7890px;">
      <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-0 jcarousel-item-0-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress1.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <img class="sale" src="assets/images/sale.gif" alt="sale">
          <span class="geo_17_red_linethr">£120
          </span>&nbsp;&nbsp;
          <span class="price geo_17_darkbrown">£100
          </span>
          <span class="colour">
            <span>
              <a href="assets/images/colour.gif">
                <img alt="Black" src="assets/images/black.gif"></a>
            </span>
            <span>
              <a href="assets/images/colour.gif">
                <img alt="Brown" src="assets/images/brown.gif"></a>
            </span>
            <span>
              <a href="assets/images/colour.gif">
                <img alt="Purple" src="assets/images/purple.gif"></a>
            </span>
          </span>
        </div>
        <div>
          <a href="#" class="large_image">
            <img alt="Rachel Dress" src="assets/images/dress2.gif"></a>
          <h3 class="geo_17_darkbrown">Rachel Dress</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress3.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
      </li>
      <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-1 jcarousel-item-1-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal" style="float: left; list-style: none outside none;" jcarouselindex="1">
      </li>
      <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-3 jcarousel-item-3-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress1.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress2.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress3.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
      </li>
      <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-6 jcarousel-item-6-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress3.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
        <div>
          <a href="#" class="large_image">
            <img alt="Elena Top" src="assets/images/dress3.gif"></a>
          <h3 class="geo_17_darkbrown">Elena Top</h3>
          <span class="price geo_17_darkbrown">£120
          </span>
        </div>
      </li>
    </ul>
  </div>
  <div class="jcarousel-prev jcarousel-prev-horizontal jcarousel-prev-disabled jcarousel-prev-disabled-horizontal" style="display: block;" disabled="true">
  </div>
  <div class="jcarousel-next jcarousel-next-horizontal" style="display: block;" disabled="false">
  </div>            
  <div class="jcarousel-control geo_10_darkbrown_capital">          7 products&nbsp;&nbsp;&nbsp;                  
    <a href="#">1</a>                 
    <a href="#">2</a>                 
    <a href="#">3</a>                         
    <a href="#">4</a>                 
    <a href="#">5</a>                 
    <a href="#">6</a>                 
    <a href="#" class="last">7</a>              
  </div>        
</div>



    

  • 
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£120
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£120
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埃琳娜·托普
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    • 


7种产品
它像它应该的那样工作，把每3个div放在li中。但我还有另一个问题。它在循环内划分“x”

例如在JS中：

<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">

  •
    • 而HTML输出是：

    <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-0 jcarousel-item-0-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal"></li>

then

<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-3 jcarousel-item-3-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal"></li>

then

<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-6 jcarousel-item-6-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal"></li>

etc...

  • 
然后

  • 
然后

  • 
等
    我需要的是计数是0-1-2-3-4-5-etc，但除法是0-3-6-etc，jCarousel插入blank li的1-2，4-5，7-8

    如何避免循环内的“x”分割

    谢谢你

    创建另一个变量，如i=x/3；用它来代替我

    编辑@psmears:

    他有：

    if (x % 3 === 0)
   CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">';

    if（x%3==0）
CatItems+='
  • ”；
    • 因此，如果他在if语句的范围内创建变量，一切都会很好

    所以我们应该有这样的东西：

    if (x % 3 === 0)
{
    var i = x / 3;
    CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+i+' jcarousel-item-'+i+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">';
}

    if（x%3==0）
{
var i=x/3；
CatItems+='
  • ”；
}
    • 我不确定我是否理解你的问题，但在代码中x的方括号对我来说似乎很奇怪：

    '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">'

    '
  • '
    • 尝试删除它们并查看会发生什么：

    '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-' + x + ' jcarousel-item-'+ x +'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">'

    '
  • '
    • 只需使用表达式
    （x/3）
    而不是
    x
    ，您需要递增计数

    尝试设置：

    y=Math.floor(x/3);
    在创建
  • 之前，如果（x%3==0）CatItems+='
  • 时，使用
    y
    代替
    x
    +“-水平jcarousel项目占位符jcarousel项目占位符水平”>”；

    if (x % 3 === 0) CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">';

    

    
也就是说，只有当“x除以3”的值等于“0”时，才创建“li”元素。显然，您将得到0,3,6,9等计数。。R

    if (x % 3 === 0) CatItems += '<li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-'+[x]+' jcarousel-item-'+[x]+'-horizontal jcarousel-item-placeholder jcarousel-item-placeholder-horizontal">';

    														
    •