Bootstrap - 手風琴

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本章將討論 Bootstrap 手風琴。手風琴垂直摺疊元素，透過類更改顯示和隱藏。使用 collapse JavaScript 外掛建立垂直摺疊的手風琴。

工作原理

為了摺疊，手風琴在內部使用 collapse。使用 .open 類到 .accordion 元素以呈現展開的手風琴。

基本示例

要展開和摺疊內容，請點選下面的手風琴。

您可以使用 編輯 & 執行 選項編輯和嘗試執行此程式碼。

    <!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>

無邊距

要呈現邊緣到邊緣的手風琴，請使用 .accordion-flush 刪除邊框和圓角。

您可以使用 編輯 & 執行 選項編輯和嘗試執行此程式碼。

    <!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>

始終開啟

要保持手風琴專案在另一個專案開啟時保持開啟狀態，請從每個 .accordion-collapse 中刪除 data-bs-parent 屬性。

您可以使用 編輯 & 執行 選項編輯和嘗試執行此程式碼。

    <!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>

可訪問性

有關詳細資訊，請參閱 collapse 可訪問性部分。

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