如何仅将当前li悬停在嵌套ul中? [英] How to hover only the current li in nested ul?

问题描述

我有一个嵌套列表:

li:hover {
  background-color: lightgray;
}
ul li ul li:hover {
  font-weight: bold;
}

<ul>
  <li>fnord
    <ul>
      <li>baz</li>
      <li>foo
        <ul>
          <li>baz</li>
          <li>foo</li>
        </ul>
      </li>
    </ul>
  </li>
  <li>gnarf
    <ul>
      <li>baz</li>
      <li>foo
        <ul>
          <li>baz</li>
          <li>yolo</li>
        </ul>
      </li>
    </ul>
  </li>
</ul>

问题是，悬停"foo"也将悬停"fnord"及其所有li元素.如何仅将鼠标实际上悬停在li上?

Problem is, hovering "foo" will also hover "fnord" and all of its li elements. How do I hover only the li my mouse is actually hovering over?

嵌套是可变的，从理论上讲可以是无止境的.

The nesting is variable and can, in theory, be endless.

我已经设置了 JSFiddle .

推荐答案

我相信，仅使用CSS就能获得的最接近的效果是从悬停元素的子元素中删除悬停样式...这对父母没有帮助.

I believe the closest you can get with just CSS is to remove the hover styling from the children of the hovered elements... which doesn't help the parents.

li:hover {
    background-color: lightgray;
}
li:hover {
    font-weight: bold;    
}
li:hover ul {
    background-color: white;
    font-weight: normal;
}

<ul>
    <li>fnord
        <ul>
            <li>baz</li>
            <li>foo
                <ul>
                    <li>baz</li>
                    <li>foo</li>
                </ul>
            </li>
        </ul>
    </li>
    <li>gnarf
        <ul>
            <li>baz</li>
            <li>foo
                <ul>
                    <li>baz</li>
                    <li>foo</li>
                </ul>
            </li>
        </ul>
    </li>
</ul>

JSFiddle

对于您发现的重复项，可接受的答案是我看到的使用e.stopPropagation使用JavaScript做到这一点的最佳方法:

The accepted answer on the duplicate you found is the best way I've seen to do this with JavaScript, using e.stopPropagation: Cascading <li>-hover effect using CSS. You'll want to be more specific than 'all lis' in that selector though:

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

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

.currentHover {
    background-color: red;
}
li.currentHover ul {
    background-color: white;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="container">
    <li>fnord
        <ul>
            <li>baz</li>
            <li>foo
                <ul>
                    <li>baz</li>
                    <li>foo</li>
                </ul>
            </li>
        </ul>
    </li>
    <li>gnarf
        <ul>
            <li>baz</li>
            <li>foo
                <ul>
                    <li>baz</li>
                    <li>foo</li>
                </ul>
            </li>
        </ul>
    </li>
</ul>

JSFiddle .

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