Bootstrap 5 手风琴在展开时变得太宽

Question

我原本期望手风琴组件能够展开以匹配其父元素的宽度，但是当它展开时，它不仅会扩展自身，还会扩展父元素，导致左窗格压缩很多。需要做什么才能实现期望的行为？我很感激任何答案。

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>

<div id="container" class="d-flex flex-column align-items-stretch w-100 h-100">
      <div class="d-flex align-items-stretch h-100" style="min-height:0">
        <div id="left-pane" class="border border-secondary rounded-1 w-25 m-3 me-2 p-2 bg-light overflow-y-auto">
          <div class="list-group">
            <a href="" class="list-group-item active">An active item</a>
          </div>
        </div>
        <div id="right-pane" class="flex-grow-1 d-flex flex-column border border-secondary rounded-1 m-3 ms-2 p-2 bg-light overflow-y-auto">
          <ul class="nav nav-tabs h-auto" id="tabs" role="tablist">
            <li class="nav-item" role="presentation">
              <button 
                class="nav-link active" 
                id="tab1" 
                data-bs-toggle="tab" 
                data-bs-target="#tab1-pane" 
                type="button" 
                role="tab" 
                aria-controls="tab1-pane" 
                aria-selected="true">
                  System info
              </button>
            </li>
            <li class="nav-item" role="presentation">
              <button 
                class="nav-link" 
                id="tab2" 
                data-bs-toggle="tab" 
                data-bs-target="#tab2-pane" 
                type="button" 
                role="tab" 
                aria-controls="tab2-pane" 
                aria-selected="false">
                  Profile
              </button>
            </li>
          </ul>
          <div class="tab-content h-100 w-100 overflow-y-auto px-3 py-2 border-start border-bottom border-end rounded-bottom" id="tabs-content">
            <div 
              class="tab-pane fade show active" 
              id="tab1-pane" 
              role="tabpanel" 
              aria-labelledby="tab1" 
              tabindex="0">
                <div class="accordion" id="accordionPanelsStayOpenExample">
                  <div class="accordion-item">
                    <h2 class="accordion-header">
                      <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#panelsStayOpen-collapseOne" aria-expanded="false" aria-controls="panelsStayOpen-collapseOne">
                        Accordion Item #1
                      </button>
                    </h2>
                    <div id="panelsStayOpen-collapseOne" class="accordion-collapse collapse">
                      <div class="accordion-body w-auto h-auto">
                        <strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
                      </div>
                    </div>
                  </div>
                </div>
            </div>
            <div 
              class="tab-pane fade" 
              id="tab2-pane" 
              role="tabpanel" 
              aria-labelledby="tab2" 
              tabindex="0">
                tab2 content
            </div>
          </div>
        </div>
      </div>
    </div>

我尝试稍微调整一下手风琴标题的宽度及其内容，但这没有用。

Answer 1

#right-pane 元素没有显式声明 flex-basis 或 width，因此它将占用所需的空间。当手风琴关闭时，它会按照您的预期工作，因为它的内容宽度较窄（然后由于 flex-grow 中的 flex-grow: 1 ，然后会增长以填充剩余空间-1 类）。但是，当显示手风琴的内容时，内容将尝试占用尽可能多的水平空间。

为避免这种情况，请考虑在#right-pane元素上设置某种flex-basis或width，例如width ：25%通过w-25`此处：

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>

<div id="container" class="d-flex flex-column align-items-stretch w-100 h-100">
      <div class="d-flex align-items-stretch h-100" style="min-height:0">
        <div id="left-pane" class="border border-secondary rounded-1 w-25 m-3 me-2 p-2 bg-light overflow-y-auto">
          <div class="list-group">
            <a href="" class="list-group-item active">An active item</a>
          </div>
        </div>
        <div id="right-pane" class="flex-grow-1 d-flex flex-column border border-secondary rounded-1 m-3 ms-2 p-2 bg-light overflow-y-auto w-25">
          <ul class="nav nav-tabs h-auto" id="tabs" role="tablist">
            <li class="nav-item" role="presentation">
              <button 
                class="nav-link active" 
                id="tab1" 
                data-bs-toggle="tab" 
                data-bs-target="#tab1-pane" 
                type="button" 
                role="tab" 
                aria-controls="tab1-pane" 
                aria-selected="true">
                  System info
              </button>
            </li>
            <li class="nav-item" role="presentation">
              <button 
                class="nav-link" 
                id="tab2" 
                data-bs-toggle="tab" 
                data-bs-target="#tab2-pane" 
                type="button" 
                role="tab" 
                aria-controls="tab2-pane" 
                aria-selected="false">
                  Profile
              </button>
            </li>
          </ul>
          <div class="tab-content h-100 w-100 overflow-y-auto px-3 py-2 border-start border-bottom border-end rounded-bottom" id="tabs-content">
            <div 
              class="tab-pane fade show active" 
              id="tab1-pane" 
              role="tabpanel" 
              aria-labelledby="tab1" 
              tabindex="0">
                <div class="accordion" id="accordionPanelsStayOpenExample">
                  <div class="accordion-item">
                    <h2 class="accordion-header">
                      <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#panelsStayOpen-collapseOne" aria-expanded="false" aria-controls="panelsStayOpen-collapseOne">
                        Accordion Item #1
                      </button>
                    </h2>
                    <div id="panelsStayOpen-collapseOne" class="accordion-collapse collapse">
                      <div class="accordion-body w-auto h-auto">
                        <strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
                      </div>
                    </div>
                  </div>
                </div>
            </div>
            <div 
              class="tab-pane fade" 
              id="tab2-pane" 
              role="tabpanel" 
              aria-labelledby="tab2" 
              tabindex="0">
                tab2 content
            </div>
          </div>
        </div>
      </div>
    </div>