Bootstrap 5.1.3 导航栏（按钮）折叠按钮无法正常工作

Question

一旦我单击折叠的导航栏按钮，它就会展开并显示导航栏的内容，但再次单击该按钮后它不会再次折叠。 下面是 html 代码。

*<!-- CSS Stylesheet -->*
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

  *<!-- Bootstap Scripts -->*
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js" integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js" integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous"></script>


  <nav class="navbar fixed-top navbar-expand-lg navbar-dark" style="background-color: #95D1CC;">
<div class="container-fluid">
  <a class="navbar-brand" href="#">Simon Game</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 ms-auto mb-2 mb-lg-0">
      <li class="nav-item">
        <a class="nav-link" aria-current="page" href="CSS-My Site/about_index.html">About Developer</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="Instructions/instructions_index.html">Instructions</a>
      </li>
    </ul>
  </div>
</div>
</nav>

Answer 1

你把它都包括了两次。 它不会以这种方式工作。

您应该包括bootstrap.bundle.min.js或（ popper.min.js + bootstrap.min.js ）。

我遇到了同样的问题，在我的情况下，我无意中这样做了，这是错误的并导致同样的问题：

import "bootstrap"
import "bootstrap/js/src/collapse"; // remove, otherwise it will not work