Html 使用 CSS 的级联 <li>-hover 效果

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时间:2020-08-29 11:24:02  来源:igfitidea点击:

Cascading <li>-hover effect using CSS

htmlcsshoverhtml-lists

提问by raisyn

I have got an simple html unordered list.

我有一个简单的 html 无序列表。

<ul>
    <li>Item 1</li>
    <li>
        Group 1
        <ul>
            <li>Item 2</li>
            <li>Item 3</li>
        </ul>
    </li>
</ul>

I want to use CSS to make a simple effect when the mouse is over an Item or a Group.

当鼠标悬停在 Item 或 Group 上时,我想使用 CSS 来制作一个简单的效果。

li:hover
{
    background-color:#ff0000;
}

It works quite fine for "Group 1" or "Item 1" (not contained in a group) - When I'm moving the mouse over the color changes. But if I move over "Item 2" or "Item 3" "Group 1" also remains hightlighted (red background). In this case I only want to highlight "Item 2" or "Item 3".

它适用于“组 1”或“项目 1”(不包含在组中) - 当我将鼠标移到颜色变化上时。但是,如果我移过“项目 2”或“项目 3”,“第 1 组”也会保持高亮显示(红色背景)。在这种情况下,我只想突出显示“项目 2”或“项目 3”。

Has anyone an idea how to do this?

有谁知道如何做到这一点?

Thanks for your help!

谢谢你的帮助!

=============================== EDIT

================================ 编辑

<ul>
    <li>Item 1</li>
    <li>
        Group 1
        <ul>
            <li>Item 2</li>
            <li>Group 2
                <ul>
                    <li>Item 3</li>
                    <li>Item 4</li>
                </ul>
            </li>
        </ul>
    </li>
</ul>

Mouse Over xxx should highlight yyy
xxx -> yyy
Item1 -> Item1
Group1 -> Group1, Item2, Group2, Item3, Item4
Item2 -> Item2
Group2 -> Group2, Item3, Item4
Item3 -> Item3
Item4 -> Item4

鼠标悬停 xxx 应该突出显示 yyy
xxx -> yyy
Item1 -> Item1
Group1 -> Group1, Item2, Group2, Item3, Item4
Item2 -> Item2
Group2 -> Group2, Item3, Item4
Item3 -> Item3
Item4 -> Item4

Please see http://image-upload.de/image/r76d79/1c7af56a19.png,just a quick drawing.

请参阅http://image-upload.de/image/r76d79/1c7af56a19.png,只是一个快速绘图。

采纳答案by raisyn

Found probably the best solution at the jQuery documentation. http://api.jquery.com/event.stopPropagation/

在 jQuery 文档中找到了可能是最好的解决方案。 http://api.jquery.com/event.stopPropagation/

$('li').mouseover(function(e)
{
    e.stopPropagation();
    $(this).addClass('hover');
});

$('li').mouseout(function()
{
    $(this).removeClass('hover');
});

回答by RobinJ

This solution isn't a purely HTML/CSS one, but it works. It uses the Javascript library jQuery.
http://jsfiddle.net/XP3Vp/

这个解决方案不是纯粹的 HTML/CSS 解决方案,但它有效。它使用 Javascript 库 jQuery。
http://jsfiddle.net/XP3Vp/

Put this in the head-section of your page:

把它放在你页面的头部:

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script type="text/javascript">
$('li').mouseover(function()
  {
          if ($('li ul li:hover').length) 
          {
              $('li ul li:hover').css('background','red'); 
          }
          else
          {
               $('li:hover').css('background','red'); 
          }
  });
$('li').mouseout(function()
  {
          $(this).css('background', 'transparent');
  });
</script>

Use this if you don't want the underlying list items to be highlighted as well when moving the cursor over Group 1: http://jsfiddle.net/CwhhN/

如果您不希望在将光标移到上方时也突出显示底层列表项,请使用此选项Group 1http: //jsfiddle.net/CwhhN/

回答by ANeves

Group 1contains Item 2. So, when you are hovering Item 2you are also hovering Group 1.

Group 1包含Item 2. 所以,当你悬停时,Item 2你也在悬停Group 1

Thus, with CSS what you want is not possible without mis-formatting HTML on purpose.

因此,如果不故意错误地格式化 HTML,则使用 CSS 是不可能的。

With JS you can get there, though.
If this is acceptable, refer to @RobinJ's answer.

不过,有了 JS,您就可以到达那里。
如果这是可以接受的,请参阅@RobinJ 的回答

回答by Gabriele Petrioli

The best you can do is to colorize the ulas well ..

你能做的最好的事情就是给ul..

ul{background-color:#fff;}
li:hover
{
    background-color:#ff0000;
}

something like this http://jsfiddle.net/gaby/DxsDa/although it will still highlight the group 1text..

像这样的http://jsfiddle.net/gaby/DxsDa/虽然它仍然会突出显示group 1文本..



Alternatively you can resort to invalid html but i would not suggest that for obvious reasons.. http://jsfiddle.net/gaby/DxsDa/1/

或者,您可以使用无效的 html,但出于明显的原因,我不建议这样做.. http://jsfiddle.net/gaby/DxsDa/1/

回答by ValeriiVasin

Use class or id for UL element (which is parent for highlighted li's) and directly children selector:

对 UL 元素(它是高亮 li 的父元素)使用 class 或 id 并直接使用子选择器:

ul#your_id > li:hover{ background-color: #f00; }

It will fix error which happens because you try to highlight every li's elements :)

它将修复由于您尝试突出显示每个 li 的元素而发生的错误:)