复选框和同级选择器

Question

我使用标签作为复选框的蒙版，并且在选中相应的复选框时需要更改标签的背景。这是我到目前为止所做的：

.viewbutton {
  height: 48px;
  width: 48px;
  background-color: #FFFFFF;
  border-radius: 50%;
  margin: 0px 4px;
  border: 0px;
  border: 1px solid #CDCDCD;
  cursor: pointer;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 24px;
  position: relative;
  display: inline-block;
}

#comparechk:checked+#comparebtn,
#editchk:checked+#editbtn,
#multiplechk:checked+#multiplebtn {
  background-color: #005EFF;
  outline: none;
}

<input type="checkbox" id="comparechk" class="chkhidden">
<input type="checkbox" id="editchk" class="chkhidden">
<input type="checkbox" id="multiplechk" class="chkhidden">

<label for="comparechk" id="comparebtn" class="viewbutton"></label>
<label for="editchk" id="editbtn" class="viewbutton"></label>
<label for="multiplechk" id="multiplebtn" class="viewbutton"></label>

Answer 1

+是相邻同级组合器，所以A + B表示直接跟随 的B元素，中间没有其他元素。A

你想要通用的兄弟组合器，~

    #comparechk:checked ~ #comparebtn,
    #editchk:checked ~ #editbtn,
    #multiplechk:checked ~ #multiplebtn {
        background-color: #005EFF;
        outline: none;
    }

http://jsfiddle.net/8u031bom/3/