如何在下拉菜单中创建复选框？

一尘不染

如何在下拉菜单中创建复选框？

css

我想创建一个多选保管箱列表。实际上，我必须使用下拉菜单选择多个选项。当我如下所示简单地执行此操作时：

<select>
 <option><input type="checkbox"></option>
</select>

然后，复选框显示在下拉字段的前面。但是我想为每个选项而不是整体创建它，以便我可以选择多个选项。有什么办法吗？

阅读 545

2020-05-16

共1个答案

一尘不染

这是一个简单的下拉清单

CSS

.dropdown-check-list {
  display: inline-block;
}
.dropdown-check-list .anchor {
  position: relative;
  cursor: pointer;
  display: inline-block;
  padding: 5px 50px 5px 10px;
  border: 1px solid #ccc;
}
.dropdown-check-list .anchor:after {
  position: absolute;
  content: "";
  border-left: 2px solid black;
  border-top: 2px solid black;
  padding: 5px;
  right: 10px;
  top: 20%;
  -moz-transform: rotate(-135deg);
  -ms-transform: rotate(-135deg);
  -o-transform: rotate(-135deg);
  -webkit-transform: rotate(-135deg);
  transform: rotate(-135deg);
}
.dropdown-check-list .anchor:active:after {
  right: 8px;
  top: 21%;
}
.dropdown-check-list ul.items {
  padding: 2px;
  display: none;
  margin: 0;
  border: 1px solid #ccc;
  border-top: none;
}
.dropdown-check-list ul.items li {
  list-style: none;
}
.dropdown-check-list.visible .anchor {
  color: #0094ff;
}
.dropdown-check-list.visible .items {
  display: block;
}

//标记和脚本

<body>

    <div id="list1" class="dropdown-check-list" tabindex="100">
        <span class="anchor">Select Fruits</span>
        <ul class="items">
            <li><input type="checkbox" />Apple </li>
            <li><input type="checkbox" />Orange</li>
            <li><input type="checkbox" />Grapes </li>
            <li><input type="checkbox" />Berry </li>
            <li><input type="checkbox" />Mango </li>
            <li><input type="checkbox" />Banana </li>
            <li><input type="checkbox" />Tomato</li>
        </ul>
    </div>

    <script type="text/javascript">

        var checkList = document.getElementById('list1');
        checkList.getElementsByClassName('anchor')[0].onclick = function (evt) {
            if (checkList.classList.contains('visible'))
                checkList.classList.remove('visible');
            else
                checkList.classList.add('visible');
        }

        checkList.onblur = function(evt) {
            checkList.classList.remove('visible');
        }
    </script>

</body>

2020-05-16