Bootstrap 简明教程
Bootstrap - Accordion
本章将讨论 Bootstrap 手风琴。手风琴垂直折叠元素，通过类更改显示和隐藏。使用折叠 JavaScript 插件来创建垂直折叠的手风琴。
How it works
为了折叠，手风琴在内部使用 collapse 。使用 .open 类将 .accordion 元素渲染为已扩展的手风琴。
Basic Example
若要展开和折叠内容，请单击下面的手风琴。
您可以使用*编辑和运行*选项编辑并尝试运行此代码。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap - Accordion</title>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
<style>
</style>
</head>
<body>
<div class="accordion" id="basicAccordion">
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#firstCollapse" aria-expanded="true" aria-controls="firstCollapse">
Bootstrap - Accordian
</button>
</h2>
<div id="firstCollapse" class="accordion-collapse collapse show" data-bs-parent="#basicAccordion">
<div class="accordion-body">
The <b>accordion</b> collapses elements vertically, shown and hidden by class change.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#secondCollapse" aria-expanded="false" aria-controls="secondCollapse">
Bootstrap - Buttons
</button>
</h2>
<div id="secondCollapse" class="accordion-collapse collapse" data-bs-parent="#basicAccordion">
<div class="accordion-body">
You can use Bootstrap’s custom button styles for actions in forms, dialogs and many more.
</div>
</div>
</div>
</div>
</body>
</html>Flush
若要呈现实边手风琴，请使用 .accordion-flush 来移除边框和圆角。
您可以使用*编辑和运行*选项编辑并尝试运行此代码。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap - Accordion</title>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
<style>
</style>
</head>
<body>
<div class="accordion accordion-flush" id="flushAccordion">
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse"
data-bs-target="#flushCollapseOne" aria-expanded="false" aria-controls="flushCollapseOne">
Bootstrap - Accordian
</button>
</h2>
<div id="flushCollapseOne" class="accordion-collapse collapse" data-bs-parent="#flushAccordion">
<div class="accordion-body">
The <b>accordion</b> collapses elements vertically, shown and hidden by class change.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse"
data-bs-target="#flushCollapseTwo" aria-expanded="false" aria-controls="flushCollapseTwo">
Bootstrap - Buttons
</button>
</h2>
<div id="flushCollapseTwo" class="accordion-collapse collapse" data-bs-parent="#flushAccordion">
<div class="accordion-body">
You can use Bootstrap’s custom button styles for actions in forms, dialogs and many more.
</div>
</div>
</div>
</div>
</div>
</body>
</html>Always open
若要在打开另一项的同时保持手风琴项处于打开状态，请从每个 .accordion-collapse 中移除 data-bs-parent 属性。
您可以使用*编辑和运行*选项编辑并尝试运行此代码。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap - Accordion</title>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
<style>
</style>
</head>
<body>
<div class="accordion" id="alwaysOpenAccordion">
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#firstCollpaseofAlwaysOpen" aria-expanded="true" aria-controls="firstCollpaseofAlwaysOpen">
Bootstrap - Accordian
</button>
</h2>
<div id="firstCollpaseofAlwaysOpen" class="accordion-collapse collapse show">
<div class="accordion-body">
The <b>accordion</b> collapses elements vertically, shown and hidden by class change.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#secondCollpaseofAlwaysOpen" aria-expanded="false" aria-controls="secondCollpaseofAlwaysOpen">
Bootstrap - Buttons
</button>
</h2>
<div id="secondCollpaseofAlwaysOpen" class="accordion-collapse collapse">
<div class="accordion-body">
The <b>accordion</b> collapses elements vertically, shown and hidden by class change.
</div>
</div>
</div>
</div>
</body>
</html>Accessibility
详情请参阅 collapse accessibility section 。