如何在下拉菜单中创建复选框?

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?

回答:

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>

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