第N个子css属性正在计算display属性设置为none的html元素.如何更改

Nth-child css property is counting html elements with display property set to none. How to change it?

本文关键字：属性 none html 设置 元素 何更改 display 个子 css 计算      更新时间：2023-09-26

我有一个使用无序列表的简单库。

    <h1>Projects</h1>
    <hr>
    <!-- Projects gallery as unordered list -->
    <ul class="gallery">
      <li class="item residential">
        <img src="Projects/01-HighTorEast-EarlShilton/01-thumbnail.jpg" width="212" height="119" alt="High Tor East, Earl Shilton">
        <h2><a class="info" href="Projects/01-HighTorEast-EarlShilton/info.php">High Tor East, Earl Shilton</a></h2>
        <h3><a class="cat" href="residential">Residential</a></h3>
      </li>
      <li class="item modernisation">
        <img src="Projects/02-Hollycroft-Hinckley/02-thumbnail.jpg" width="212" height="119" alt="Hollycroft, Hinckley">
        <h2><a class="info" href="Projects/02-Hollycroft-Hinckley/info.php">Hollycroft, Hinckley</a></h2>
        <h3><a class="cat" href="modernisation">Modernisation & Domestic Extensions</a></h3>
      </li>
      <li class="item residential">
        <img src="Projects/03-SpaLane-Hinckley/03-thumbnail.jpg" width="212" height="119" alt="Spa Lane, Hinckley">
        <h2><a class="info" href="Projects/03-SpaLane-Hinckley/info.php">Spa Lane, Hinckley</a></h2>
        <h3><a class="cat" href="residential">Residential</a></h3>
      </li>
      <li class="item residential">
        <img src="Projects/04-Farnhambridge-Rothley/04-thumbnail.jpg" width="212" height="119" alt="Farnhambridge Farm, Rothley">
        <h2><a class="info" href="Projects/04-Farnhambridge-Rothley/info.php">Farnhambridge Farm, Rothley</a></h2>
        <h3><a class="cat" href="residential">Residential</a></h3>
      </li>
      <li class="item modernisation">
        <img src="Projects/05-NetherfieldClose-BroughtanAstley/05-thumbnail.jpg" width="212" height="119" alt="Netherfield Close, Broughtan Astley">
        <h2><a class="info" href="Projects/05-NetherfieldClose-BroughtanAstley/info.php">Netherfield Close, Broughtan Astley</a></h2>
        <h3><a class="cat" href="modernisation">Modernisation & Domestic Extensions</a></h3>
      </li>
      <li class="item modernisation">
        <img src="Projects/06-Bridlepath-Elmesthorpe/06-thumbnail.jpg" width="212" height="119" alt="Bridlepath, Elmesthorpe">
        <h2><a class="info" href="Projects/06-Bridlepath-Elmesthorpe/info.php">Bridlepath, Elmesthorpe</a></h2>
        <h3><a class="cat" href="modernisation">Modernisation & Domestic Extensions</a></h3>
      </li>
      <li class="item residential">
        <img src="Projects/07-Bridlepath-Elmesthorpe/07-thumbnail.jpg" width="212" height="119" alt="Bridlepath, Elmesthorpe">
        <h2><a class="info" href="Projects/07-Bridlepath-Elmesthorpe/info.php">Bridlepath, Elmesthorpe</a></h2>
        <h3><a class="cat" href="residential">Residential</a></h3>
      </li>
      <li class="item feasibility">
        <img src="Projects/08-GrangeCroft-Ullesthorpe/08-thumbnail.jpg" width="212" height="119" alt="Grange Croft, Ullesthorpe">
        <h2><a class="info" href="Projects/08-GrangeCroft-Ullesthorpe/info.php">Grange Croft, Ullesthorpe</a></h2>
        <h3><a class="cat" href="feasibility">Feasibility layouts</a></h3>
      </li>
      <li class="item master">
        <img src="Projects/09-RailwayInn-Sileby/09-thumbnail.jpg" width="212" height="119" alt="The Railway Inn, Sileby">
        <h2><a class="info" href="Projects/09-RailwayInn-Sileby/info.php">The Railway Inn, Sileby</a></h2>
        <h3><a class="cat" href="master">Master planning</a></h3>
      </li>

    </ul>
  </section>

在我的css中，我为.item类的每四个子类设置了右边距值为零。我这样做是为了在我的页面上把四个项目放在一行，如果不去掉边距，我只能放三个。

ul.gallery { clear:both; list-style:none; margin:0; padding:0; width:940px; }
.gallery a:hover { text-decoration:underline; }
li.item { display:inline; margin:30px 20px 30px 0px; padding:0px; height:178px; width:220px; float:left; background:#ededed url('../Images/featuredline.png') repeat-x 0% 100%; overflow:hidden; }
li.item:nth-child(4n+4) { margin:30px 0px 30px 0px; }

接下来，我编写了一些小的jQuery代码来按类别对项目进行排序。因此，如果有人点击"住宅"链接，就会隐藏不同类别的元素。

    $('.cat').bind('click', function(e) {
    var cat = $(this).attr('href');
    $('.item').each(function () {
    var itemClass = $(this).attr('class');
    if (itemClass != 'item '+cat) {
        $(this).css({"display":"none"});
    };

    });
    e.preventDefault();

我的问题是：当我用上面的jQuery脚本对我的图库项目进行排序时，.item:nth子属性似乎仍在计算display属性设置为none的元素。我不知道该怎么做。我需要css.item:nth子属性来计算jQuery插件启动后的可见元素。

此处提供网站http://www.damianwojtczak.com/avd2/projects.php

删除你的第n个子CSS样式，每次更改布局时，都调用这个：

$("li.item:visible").each(function(i) {
    if((i+1)%4==0) $(this).css("margin","30px 0");
    else $(this).css("margin","30px 20px 30px 0");
})

刚刚在你的网站上用firebug测试了一下，效果不错。

一个解决方案是将nth-child css选择器更改为一个类，并使用jQuery切换该类。

li.item.marginClass { margin:30px 0px 30px 0px; }

JS:

$(function(){
    var $items=$('li.item');
    function toggleMargin(}{
        $items.removeClass('marginClass').filter(':visible').addClass(function(index){
              return index % 4 ===0 && index !=0 ? 'marginClass' : '';
        });
    }
    /* call for page loaded items*/
    toggleMargin(};
    $('.cat').bind('click', function (e) {
        /* filtering code here*/
        /* adjust class*/
         toggleMargin(};
    })

});

当您隐藏节点时，设置一些"isHidden"属性标志$(this).attr('isHidden')，当您显示节点时，删除此标志.removeAttr('isHidden')，然后您可以更新选择器

li.item:not([isHidden]):nth-child(4n+4) { margin:30px 0px 30px 0px; }

如果您不想使用额外的属性，可以将其添加为类名，如Tomalak的回答所示。

CSS

而不是

li.item:nth-child(4n+4) { margin:30px 0px 30px 0px; }

使用

li.item.split { margin:30px 0px 30px 0px; }

jQuery

reorderColumns  =   function(ev) {
    $('li.item').removeClass('split');
    $('li.item:visible:nth-child(4n+4)').addClass('split');
    ev.preventDefault();
};
$('.cat').on('click',reorderColumns);
相关文章：