Bootstrap 响应式菜单按钮不响应

Question

我制作的这个 Bootstrap 菜单让我很不爽，我不明白为什么它不会折叠，动画。一切正常，但按钮不起作用。

        <nav class="navbar navbar-expand-lg navbar-light bg-dark alb">
          <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
      <!-- Logo pentru desktop -->
                    <a href="index.html" class="logo">
                        <img src="img/logo.png" alt="IMG-LOGO">
                    </a>

          <div class="collapse navbar-collapse" id="navbarTogglerDemo03">
            <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
              <li class="nav-item active">
                <a class="nav-link" href="#" style="color:white">Home <span class="sr-only">(current)</span></a>
              </li>
              <li class="nav-item">
                <a class="nav-link" href="#" style="color:white">Marci moto</a>
              </li>
              <li class="nav-item">
                <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true" style="color:white">Sectiune dezactivata</a>
              </li>
            </ul>
            <form class="form-inline my-2 my-lg-0">
              <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
              <button class="btn btn-outline-success my-2 my-sm-0" type="submit" style="color:white">Cautare</button>
            </form>
          </div>
        </nav>

Answer 1

我使用了您的相同代码，只是在我的代码中使用了在线 CDN，对于您提供的相同代码，它工作正常。将你的代码与我的代码进行比较，找出错误所在。

以下是我的代码片段：

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</head>
<body>
  <nav class="navbar navbar-expand-lg navbar-light bg-dark alb">
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <a href="index.html" class="logo">
      <img src="img/logo.png" alt="IMG-LOGO">
    </a>

    <div class="collapse navbar-collapse" id="navbarTogglerDemo03">
      <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
        <li class="nav-item active">
          <a class="nav-link" href="#" style="color:white">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#" style="color:white">Marci moto</a>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true" style="color:white">Sectiune dezactivata</a>
        </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
        <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit" style="color:white">Cautare</button>
      </form>
    </div>
  </nav> 
</body>
</html>

希望本文能帮助您解决问题。

谢谢...

Bootstrap 响应式菜单按钮不响应

Bootstrap Responsive Menu button won't Respond

html

css

menu

twitter-bootstrap

bootstrap-4