Question

在此代码中：

<div id="Container">
  <span class='first'>First</span>
  <span class='second'>Second</span>
  <span class='third'>Third</span>
</div>

我希望在:hover时更改颜色。

IF（.first:hover）THEN .first { color: red; }
IF（.second:hover）THEN .first, .second { color: red; }
IF（.third:hover）THEN .first, .second, .third { color: red; }

没有JS，这可能吗？我可以接受CSS Hacks：）

可能的答案：

@panther的回答

更难的版本：

<div id="Container">
  <span class='first' style='color: red'>First</span>
  <span class='second' style='color: green'>Second</span>
  <span class='third' style='color: blue'>Third</span>
</div>

IF（.first:hover）THEN .first { color: pink; }
IF（.second:hover）THEN .first, .second { color: pink; }
IF（.third:hover）THEN .first, .second, .third { color: pink; }

答案：

@Armfoot的回答似乎很好：）

Answer 1

在CSS中没有先前的兄弟选择器，但是......有时您可以使用已知的选择器来完成它。有时。

<style>
    span {color: #000; display: block;}
    div:hover span {color: #f00;}
    span:hover ~ span {color: #000}
</style>

<div id="FirstSecondThird-Container">
    <span class='first'>First</span>
    <span class='second'>Second</span>
    <span class='third'>Third</span>
</div>

https://jsfiddle.net/45zLdcvr/

它适用于block span s（当然是浮动的）。如果span s的默认值为display: inline，则当您将div悬停在跨距空间中时，它会闪烁。

<强>更新：
您在每个跨度都有自己的颜色时更新了问题，然后可能是：

span {color: red}
.second {color: green}
.third {color: blue}

span {display: block;}
div:hover span {color: pink;}
span:hover ~ .second {color: green}
span:hover ~ .third {color: blue}

https://jsfiddle.net/45zLdcvr/1/

Answer 2

这就是我认为可以做的事情，你想要实现整洁的目标

@mixin color_on_hover($class){

@if $class==first {span:nth-of-type(1){color:red;}}
@else if $class==second {span:nth-of-type(1), span:nth-of-type(2){color:red;}}
@else if $class==third {span:nth-of-type(1), span:nth-of-type(2), span:nth-of-type(3){color:red;}}

}
span.first:hover{
@include color_on_hover(first);
}
span.second:hover{
@include color_on_hover(second);
}
span.third:hover{
@include color_on_hover(third);
}

希望它有所帮助！

Answer 3

我找到了@each in SASS基于panther's answer的方法：

$containerID: FirstSecondThird-Container;
##{$containerID}:hover span {color:pink} 
@each $spanclass, $spancolor in (first, red), (second, green), (third, blue) {
  ##{$containerID} span:hover ~ .#{$spanclass}, .#{$spanclass} {
    color: #{$spancolor};
  }
}

它有点短，但结果是（生成的CSS）：

＆＃13;

#FirstSecondThird-Container:hover span {
  color: pink;
}
#FirstSecondThird-Container span:hover ~ .first, .first {
  color: red;
}
#FirstSecondThird-Container span:hover ~ .second, .second {
  color: green;
}
#FirstSecondThird-Container span:hover ~ .third, .third {
  color: blue;
}

span {display: block;} /* this line was not generated, it's just to place them vertically */

＆＃13;

<div id="FirstSecondThird-Container">
  <span class='first'>First</span>
  <span class='second'>Second</span>
  <span class='third'>Third</span>
</div>

＆＃13;

其中有与panther's fiddle类似的CSS规则。

很好的挑战 123qwe ：）

CSS / Less / Sass - 在以下时间匹配每个兄弟姐妹：悬停

3 个答案: