我有一个位置固定为侧边栏的 div。侧面有几个多选下拉菜单。问题是,当我打开任何下拉菜单并滚动侧栏时,下拉菜单会停留在屏幕内。
$('.jqms').multiselect();
@charset "UTF-8";
.header {
height: 500px;
overflow: scroll;
}
html {
background-color: #fcfcfc;
}
body {
padding: 1.5em;
margin: 2em auto;
max-width: 500px;
border: 1px solid #ccc;
background-color: #fff;
}
a {
transition: color .3s;
color: blue;
}
a:hover {
text-decoration: none;
}
h1 {
margin: 0 0 2rem;
text-align: center;
}
h1 a {
color: #000;
text-decoration: none;
}
h1 a:hover {
color: blue;
text-decoration: underline;
}
section {
display: flex;
flex-wrap: nowrap;
align-items: flex-start;
}
section > label {
display: inline-block;
width: 100px;
}
section + section {
margin-top: 1rem;
}
section.spacer {
border-top: 1px dotted #ccc;
padding-top: 1rem;
}
footer {
border-top: 1px dashed #ccc;
margin-top: 2rem;
padding-top: .75rem;
font-size: .75rem;
text-align: center;
}
footer ul {
list-style: none;
padding: 0;
margin: 0;
}
footer li {
display: inline-block;
}
footer li + li {
margin-left: .5em;
}
.btn {
margin-left: .5em;
}
/* ---------------------------------------- *
* multiselect *
* ---------------------------------------- */
.ui-multiselect--filter, .ui-multiselect--bulk {
padding: 5px 10px;
border-bottom: 1px solid #ccc;
}
.ui-multiselect--option, .ui-multiselect--optgroup-wrap label {
display: block;
padding: 3px 10px;
}
.ui-multiselect--display {
position: relative;
padding-right: 1.4em;
border: 1px solid #ccc;
border-radius: 0;
font-size: 1em;
cursor: pointer;
background-color: #fff;
text-align: left;
}
.ui-multiselect--display:focus {
outline: none;
}
.ui-multiselect--display:hover {
background-color: #ddd;
}
.ui-multiselect--icon {
transform: translateY(-50%);
display: block;
position: absolute;
right: .25em;
top: 50%;
}
.ui-multiselect--icon:after {
display: block;
border: .375em solid transparent;
border-top-color: #000;
border-bottom-width: 0;
content: '';
}
.ui-multiselect--list-wrap {
position: absolute;
z-index: 100;
display: none;
margin-top: -1px;
border: 1px solid #ccc;
background-color: #fff;
}
.ui-multiselect--list {
margin: 0;
padding: 0;
list-style-type: none;
}
.ui-multiselect--list [type="checkbox"] {
position: relative;
top: -2px;
margin: 0 5px 0 0;
cursor: pointer;
}
.ui-multiselect--option {
cursor: pointer;
}
.ui-multiselect--option span {
white-space: nowrap;
}
.ui-multiselect--option:hover {
background-color: #ddd;
}
.ui-multiselect--optgroup-wrap label {
font-weight: bold;
}
.ui-multiselect--is-multiple .ui-multiselect--optgroup-wrap label {
cursor: pointer;
}
.ui-multiselect--optgroup-wrap.ui-multiselect--disabled label {
cursor: not-allowed;
}
.ui-multiselect--optgroup-wrap ul {
padding-left: 0;
}
.ui-multiselect--optgroup-wrap li {
padding-left: 20px;
}
.ui-multiselect--optgroup-wrap:hover {
background-color: #f7f7f7;
}
.ui-multiselect--optgroup-wrap + .ui-multiselect--optgroup-wrap {
border-top: 1px dotted #ccc;
}
.ui-multiselect--selected {
background-color: #efefef;
}
.ui-multiselect--disabled {
opacity: .5;
cursor: not-allowed;
}
.ui-multiselect--disabled [type="checkbox"] {
cursor: inherit;
}
.ui-multiselect--disabled:hover {
background-color: transparent;
}
.ui-multiselect--disabled .ui-multiselect--disabled {
opacity: 1;
}
.ui-multiselect--filter {
white-space: nowrap;
}
.ui-multiselect--filter label,
.ui-multiselect--filter input,
.ui-multiselect--filter button {
display: inline-block;
}
.ui-multiselect--filter label:after {
content: ':';
}
.ui-multiselect--filter input {
margin: 0 5px;
padding: 0;
width: 80px;
}
.ui-multiselect--filter input:focus {
outline: none;
}
.ui-multiselect--filter button {
width: 22px;
height: 22px;
border-width: 0;
text-indent: -9999em;
white-space: nowrap;
border-radius: 0;
cursor: pointer;
}
.ui-multiselect--filter button:before {
float: left;
text-indent: 0;
content: 'X';
}
.ui-multiselect--filter button:focus {
outline: none;
}
.ui-multiselect--bulk button + button {
margin-left: 5px;
}
.styling .ui-multiselect--display {
box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.2);
border-radius: 3px;
font-size: 1em;
}
.styling .ui-multiselect--display:hover {
box-shadow: 0 1px 5px 0 lightgreen;
background-color: #e8fce8;
border-color: lightgreen;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js"></script>
<script src="//rawgit.com/dirkpeter/jquery-ui.multiselect.widget/dev/src/jquery-ui.multiselect.widget.js"></script>
<div class="header">
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section><section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section><section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
<section>
<label for="select-1">Single</label>
<select id="select-1" class="jqms">
<option value="1">Commodo Ridiculus</option>
<option value="2" selected>Vehicula Euismod</option>
<option value="3">Ipsum Dapibus</option>
<option value="4">Mollis Tellus</option>
<option value="5">Nibh Quam</option>
</select>
</section>
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</div>
https://codepen.io/shahil/pen/gGoJVX
更新:仅当下拉列表放置在 overflow:scroll div 内时,才会出现此问题。