我的自举 Accordion 从打开的 1 个面板开始。我还添加了一个 JS，允许在面板折叠或展开时显示 + 或 - 。它在开始折叠的面板上效果很好，但对于开始展开的面板来说是倒退的。我该如何修复它，以便第一个面板(事件面板)以 - 而不是 + 开头？
$('.closeall').click(function() {
$('.panel-collapse.in')
.collapse('hide');
});
$('.openall').click(function() {
$('.panel-collapse:not(".in")')
.collapse('show');
});
function toggleIcon(e) {
$(e.target)
.prev('.panel-heading')
.find(".more-less")
.toggleClass('glyphicon-plus glyphicon-minus');
}
$('.panel-group').on('hidden.bs.collapse', toggleIcon);
$('.panel-group').on('shown.bs.collapse', toggleIcon);.panel-group .panel {
border-radius: 0;
box-shadow: none;
border-color: #EEEEEE;
}
.panel-default > .panel-heading {
padding: 0;
border-radius: 0;
color: #212121;
background-color: #FAFAFA;
border-color: #EEEEEE;
}
.panel-title {
font-size: 14px;
}
.panel-title > a {
display: block;
padding: 15px;
text-decoration: none;
}
.more-less {
float: right;
color: #212121;
}
.panel-default > .panel-heading + .panel-collapse > .panel-body {
border-top-color: #EEEEEE;
}<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Title Page</title>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-6">
</div>
<div class="col-md-6">
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a role="button" class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #1
</a>
</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading" role="tab" id="headingTwo">
<h4 class="panel-title">
<a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #2
</a>
</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading" role="tab" id="headingThree">
<h4 class="panel-title">
<a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #3
</a>
</h4>
</div>
<div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
</div>
<!-- panel-group -->
</div>
</div>
</div>
</body>
</html>最佳答案
从中删除:
div id="collapseOne" class="panel-collapse collapse in"
并在文件就绪时执行:
$('.panel-collapse:first').collapse('show');
片段:
function toggleIcon(e) {
var currentPanel = $(e.target).closest('div.panel-default');
$('div.panel-default').not(currentPanel).find('a[role="button"]').removeClass('glyphicon-minus').addClass('glyphicon-plus');
currentPanel.find('a[role="button"]').removeClass('glyphicon-plus').addClass('glyphicon-minus');
}
$(function () {
$('.closeall').click(function() {
$('.panel-collapse.in')
.collapse('hide');
});
$('.openall').click(function() {
$('.panel-collapse:not(".in")')
.collapse('show');
});
$('.panel-group').on('hidden.bs.collapse shown.bs.collapse', toggleIcon);
$('.panel-collapse:first').collapse('show');
});.panel-group .panel {
border-radius: 0;
box-shadow: none;
border-color: #EEEEEE;
}
.panel-default > .panel-heading {
padding: 0;
border-radius: 0;
color: #212121;
background-color: #FAFAFA;
border-color: #EEEEEE;
}
.panel-title {
font-size: 14px;
}
.panel-title > a {
display: block;
padding: 15px;
text-decoration: none;
}
.more-less {
float: right;
color: #212121;
}
.panel-default > .panel-heading + .panel-collapse > .panel-body {
border-top-color: #EEEEEE;
}<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container">
<div class="row">
<div class="col-md-6">
</div>
<div class="col-md-6">
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a role="button" class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #1
</a>
</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading" role="tab" id="headingTwo">
<h4 class="panel-title">
<a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #2
</a>
</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading" role="tab" id="headingThree">
<h4 class="panel-title">
<a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
<i class="more-less glyphicon glyphicon-plus"></i>
Collapsible Group Item #3
</a>
</h4>
</div>
<div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
<div class="panel-body">
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
</div>
</div>
</div>
<!-- panel-group -->
</div>
</div>
</div>关于javascript - 在 Active 上使用减号启动 Bootstrap Accordion ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39355267/