CSS / Less / Sass -在:hover时匹配之前的所有兄弟姐妹

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>

我想改变颜色，当:hover .

1. if ( .first:hover) then .first { color: red; }
2. if ( .second:hover) then .first, .second { color: red; }
3. if ( .third:hover) then .first, .second, .third { color: red; }

如果没有JS，这是可能的吗?我可以接受CSS hack:)

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可能的答案:

1. @panther的回答

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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>

1. if ( .first:hover) then .first { color: pink; }
2. if ( .second:hover) then .first, .second { color: pink; }
3. if ( .third:hover) then .first, .second, .third { color: pink; }

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答案:

1. @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…有时可以使用已知的选择器。有时候。

<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)。span s有默认的display: inline，当你将div悬停在跨度之间的空间时，它会闪烁。

:
当每个span都有自己的颜色时，您更新了问题，那么它可以是:

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

根据panther的回答，我想出了一个在SASS中使用@each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，但这是结果(生成的CSS):

#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 */

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

与panther's fiddle的CSS规则相似。

123年<<p>好挑战strong> qwe :)

Answer 3

我认为这就是你想要达到的目标

@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);
}

希望有帮助!