AppsScript WebApp中Bootstrap v5.3导航栏下拉菜单失效问题

问题核心：代码重复引入Bootstrap JavaScript文件引发冲突，导致依赖JS交互的下拉菜单功能失效；而搜索按钮属于纯表单提交，无需Bootstrap JS支持，因此可正常工作。

问题代码的错误点 #

你同时引入了bootstrap.bundle.min.js（已包含Popper.js和Bootstrap核心JS功能）、独立的Popper.js以及bootstrap.min.js，重复加载会破坏JS交互逻辑，直接导致下拉菜单无法正常展开。

修正后的HTML代码 #

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>About</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
  </head>
  <body class="body">

<nav class="navbar navbar-expand-lg bg-body-tertiary">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav me-auto mb-2 mb-lg-0">
        <li class="nav-item">
          <a class="nav-link active" aria-current="page" href="#">Home</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
            Dropdown
          </a>
          <ul class="dropdown-menu">
            <li><a class="dropdown-item" href="#">Action</a></li>
            <li><a class="dropdown-item" href="#">Another action</a></li>
            <li><hr class="dropdown-divider"></li>
            <li><a class="dropdown-item" href="#">Something else here</a></li>
          </ul>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled">Disabled</a>
        </li>
      </ul>
      <form class="d-flex" role="search">
        <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success" type="submit">Search</button>
      </form>
    </div>
  </div>
</nav>

    <h1>Hello, world!</h1>
    <!-- 仅保留包含Popper的Bootstrap Bundle文件即可 -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
  </body>
</html>

验证步骤 #

1. 将Apps Script项目中about.html的内容替换为上述修正后的代码
2. 确保Code.js代码保持不变：

function doGet(request) {
 return HtmlService.createTemplateFromFile('about')
     .evaluate();
}

3. 重新部署WebApp，测试导航栏下拉菜单即可正常展开。

内容的提问来源于stack exchange，提问作者Das Boomer