css奇偶选择器不起作用

Question

我正在创建一个由半颗星组成的评级控件，我希望能够在 .rating 控件中选择奇数和偶数标签。选择器应该看起来像这样，但它在这里不起作用是我的 codepen当你在那里的时候检查我的 html

.rating {
    label:nth-child(odd)::before {} // not working
}
.rating {
    label:nth-child(even)::before {} // not working
}

完整的 CSS:

@import url(https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css);

html, body {
  margin: 0;
  height: 100%;
  min-height: 100%;    
}

body {
  background: #272727;  
}

.rating { 
position: absolute;
display: inline-block;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);  

label {
  font-size: 24px;
  font-family: FontAwesome;    
  color: #afa302;
}

label.half_l::before {
  content: '\f006';
  display: inline-block;
  width: 11px;
  overflow: hidden;    
}  

label.half_r {

  width: 12px;
  position: relative;
  overflow: hidden;
  display: inline-block;
  margin-right: 3px;
}
label.half_r::before {
  content: '\f006';
  display: inline-block;
  left: -11px;
  position: relative;    
}  

label {
  float: right;
}  

label:hover {
  color: #fff239;    
}

> input {
  display: none;
}

label.half_l:hover:before,
label.half_l:hover ~ label.half_l:before {
  content: '\f089';
  color: #fff239;
}

label.half_l:hover ~ label.half_r::before {
  content: '\f005';
  color: #fff239;
}

label.half_r:hover:before {
  content: '\f005';
  color: #fff239;
}

label.half_r:hover ~ label.half_r::before,
label.half_r:hover ~ label.half_l:before {
  content: '\f005';
  color: #fff239;
}

input[type=radio]:checked ~ label.half_l:before,
input[type=radio]:checked ~ label.half_r:before{
  content: '\f005';
}

Answer 1

使用 nth-of-type 而不是 nth-child

label:nth-of-type(odd) {
  background-color:red; 
}

nth-child 寻找所有的 child ，不管他们的类型，其中 nth-of-type 寻找特定类型