Html 如何在下拉菜单中创建复选框？
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How to create checkbox inside dropdown?
提问by Vivek Kumar
I want to create a multiple selection dropbox list. Actually I have to select more than one option using a dropdown menu. When I simply do this as shown bellow:
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。当我简单地执行此操作时，如下所示：
<select>
<option><input type="checkbox"></option>
</select>
Then checkbox is showing in front of dropdown field. But I want to create it for each option not for as a whole so that I can select more than option. Is there any way to do this?
然后复选框显示在下拉字段的前面。但我想为每个选项创建它而不是作为一个整体，以便我可以选择多个选项。有没有办法做到这一点？
回答by Arun Aravind
Here is a simple dropdown checklist
这是一个简单的下拉清单
css
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;
}
// Markup and script
// 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>
回答by Jivings
This can't be done in just HTML (with form elements into optionelements).
这不能仅在 HTML 中完成（将表单元素转换为option元素）。
Or you can just use a standard select multiplefield.
或者您可以只使用标准select multiple字段。
<select multiple>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>
回答by Santosh
You can always use multiple or multiple = "true" option with a select tag, but there is one jquery plugin which makes it more beautiful. It is called chosen and can be found here.
您始终可以使用multiple 或multiple = "true" 选项与选择标签，但有一个 jquery 插件使它更漂亮。它被称为选择，可以在这里找到。
This fiddle-example might help you to get started
Thank you.
谢谢你。
回答by Naveen
var expanded = false;
function showCheckboxes() {
var checkboxes = document.getElementById("checkboxes");
if (!expanded) {
checkboxes.style.display = "block";
expanded = true;
} else {
checkboxes.style.display = "none";
expanded = false;
}
}.multiselect {
width: 200px;
}
.selectBox {
position: relative;
}
.selectBox select {
width: 100%;
font-weight: bold;
}
.overSelect {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
#checkboxes {
display: none;
border: 1px #dadada solid;
}
#checkboxes label {
display: block;
}
#checkboxes label:hover {
background-color: #1e90ff;
}<form>
<div class="multiselect">
<div class="selectBox" onclick="showCheckboxes()">
<select>
<option>Select an option</option>
</select>
<div class="overSelect"></div>
</div>
<div id="checkboxes">
<label for="one">
<input type="checkbox" id="one" />First checkbox</label>
<label for="two">
<input type="checkbox" id="two" />Second checkbox</label>
<label for="three">
<input type="checkbox" id="three" />Third checkbox</label>
</div>
</div>
</form>回答by Luke
Multiple drop downs with checkbox's and jQuery.
带有复选框和 jQuery 的多个下拉列表。
<div id="list3" class="dropdown-check-list" tabindex="100">
<span class="anchor">Which development(s) are you interested in?</span>
<ul class="items">
<li><input id="answers_2529_the-lawns" name="answers[2529][answers][]" type="checkbox" value="The Lawns"/><label for="answers_2529_the-lawns">The Lawns</label></li>
<li><input id="answers_2529_the-residence" name="answers[2529][answers][]" type="checkbox" value="The Residence"/><label for="answers_2529_the-residence">The Residence</label></li>
</ul>
</div>
<style>
.dropdown-check-list{
display: inline-block;
width: 100%;
}
.dropdown-check-list:focus{
outline:0;
}
.dropdown-check-list .anchor {
width: 98%;
position: relative;
cursor: pointer;
display: inline-block;
padding-top:5px;
padding-left:5px;
padding-bottom:5px;
border:1px #ccc solid;
}
.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;
}
</style>
<script>
jQuery(function ($) {
var checkList = $('.dropdown-check-list');
checkList.on('click', 'span.anchor', function(event){
var element = $(this).parent();
if ( element.hasClass('visible') )
{
element.removeClass('visible');
}
else
{
element.addClass('visible');
}
});
});
</script>
回答by FunkycraM
Very simple code with Bootstrap and JQuery without any additionnal javascript code :
使用 Bootstrap 和 JQuery 的非常简单的代码，没有任何额外的 javascript 代码：
HTML :
HTML :
<div class="dropdown">
<button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown button
</button>
<form class="dropdown-menu" aria-labelledby="dropdownMenuButton">
<label class="dropdown-item"><input type="checkbox" name="" value="one">First checkbox</label>
<label class="dropdown-item"><input type="checkbox" name="" value="two">Second checkbox</label>
<label class="dropdown-item"><input type="checkbox" name="" value="three">Third checkbox</label>
</form>
</div>
CSS :
CSS :
.dropdown-menu label {
display: block;
}
