javascript - 将复选框更改为选中单击跨度不起作用

Question

我想使用 css 和 jquery 开发一个带有复选框的切换按钮。我想单击代表我的切换按钮的跨度来更改给定复选框的选中属性。不幸的是，跨度不会改变属性。然而，它进入了正确的 jQuery 函数。使用按钮，它进入功能并更改属性。你能告诉我为什么我不能使用 span 来改变属性吗？

$(document).on("click", ".taskcomplete2", function() {
  if ($(".taskcompletecheck").prop('checked')) {
    $(".taskcompletecheck").prop('checked', false);
  } else {
    $(".taskcompletecheck").prop('checked', true);
  }
});

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}


/* Hide default HTML checkbox */

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}


/* The slider */

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked+.slider {
  background-color: #2196F3;
}

input:focus+.slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked+.slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}


/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<label class="switch">
   <input type="checkbox" class="taskcompletecheck">
   <span class="slider round taskcomplete2"></span>
</label>
<button type="button" class="btn btn-danger taskcomplete2">Button</button>

Answer 1

您还需要将点击事件附加到 span

$(document).on("click",".taskcomplete2,.taskcompletecheck", function(){

    ....
});

$(document).on("click",".taskcomplete2,.taskcompletecheck", function(){
  if($(".taskcompletecheck").prop('checked')){
    $(".taskcompletecheck").prop('checked', false);
  }else{
    $(".taskcompletecheck").prop('checked', true);
  }
});

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: #2196F3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<label class="switch">
   <input type="checkbox" class="taskcompletecheck">
   <span class="slider round taskcomplete2"></span>
</label>
<button type="button" class="btn btn-danger taskcomplete2">Button</button>