希望你们能帮助我解决我遇到的一个小问题
所需功能 我正在尝试创建一个跨浏览器可折叠多选框,只在折叠框时显示所选选项(当鼠标退出选择时折叠),然后在框展开(鼠标悬停)时保留所有选项并保留状态已检查的项目。请参阅底部的小提琴以获得所需的功能(仅限Firefox)
问题: 问题是,检查状态似乎没有记录在HTML中,是否可能采用GET / POST数据形式,如果是这样,如何访问它。无论是那个或我错过了什么或做错了什么,很可能是因为它不起作用; - )
需要帮助:有没有办法使用以前选中的(已选中)状态恢复多项选项的选项?
jsFiddle jQuery collapsible select box
function removeOptions($select) {
var $optionsToRemove = $select.find('option:not(:selected)'); //filter for non selected options
$optionsToRemove.remove(); //remove
}
function setSelectCurrentState($select) {
$select.data("currentHTML", $select.html()); //save the current state (this does not work for multiple)
}
function restoreOptions($select) {
var ocHTML = $select.data("currentHTML"); //retrieve the data
if (ocHTML != undefined) {
$select.html(ocHTML); //restore (the state is not sotred in the html so this doesn't work)
}
}
$(document).ready(function () {
var $hoverSelect = $('#hoverSelect');
/*As we leave the select box store the current state and then remove filtered options*/
$hoverSelect.mouseleave(function () {
setSelectCurrentState($hoverSelect); // save the current state
removeOptions($hoverSelect); //remove options
});
/*When we hover back over the select restore all options with their selected states*/
$hoverSelect.mouseenter(function () {
restoreOptions($hoverSelect);
});
});
如果你认识到这个小提琴中的代码,对不起,但我丢失了链接。
我也有类似的东西,只使用CSS并在Firefox中正常工作,但由于IE和Edge不允许设置选项 display:none; 它不起作用这些浏览器。这段代码将举例说明如果您使用Firefox查看它,我希望它能如何工作。
答案 0 :(得分:0)
输入元素的动态状态不包含在.html()
中,它只包含DOM中的HTML。
不是保存HTML,而是保存选项元素本身。他们的州将被包括在内。
function removeOptions($select) {
var $optionsToRemove = $select.find('option:not(:selected)'); //filter for non selected options
$optionsToRemove.remove(); //remove
}
function setSelectCurrentState($select) {
$select.data("currentOptions", $select.find('option'));
}
function restoreOptions($select) {
var oldOptions = $select.data("currentOptions"); //retrieve the data
if (oldOptions) {
$select.empty().append(oldOptions);
}
}
$(document).ready(function() {
var $hoverSelect = $('#hoverSelect');
/*As we leave the select box store the current state and then remove filtered options*/
$hoverSelect.mouseleave(function() {
setSelectCurrentState($hoverSelect); // save the current state
removeOptions($hoverSelect); //remove options
});
/*When we hover back over the select restore all options with their selected states*/
$hoverSelect.mouseenter(function() {
restoreOptions($hoverSelect);
});
});

body {
background-color: #99b;
}
form {
width: 150px;
margin: 0 auto;
}
h1,
h2 {
text-align: center;
}
#hoverSelect {
width: 150px;
height: 65px;
font-size: 1.2em;
}
#hoverSelect:hover {
height: 150px;
}
#wrapper {
width: 100%;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h1>Collapsable select box</h1>
<h2>only shows selected items when collapsed, all when expanded (hover)</h2>
<br />
<div id="wrapper">
<form>
<select id="hoverSelect" name="hoverSelect" multiple="multiple">
<option value="1">One</option>
<option value="2" class="two">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
<option value="5">Five</option>
<option value="6">Six</option>
</select>
</form>
</div>
<br />
<h2>It should remember state but doesn't</h2>
&#13;