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Html 引导下拉按钮没有';t使用引导4进行下拉_Html_Jquery_Bootstrap 4_Drop Down Menu_Popper.js - Fatal编程技术网

Html 引导下拉按钮没有';t使用引导4进行下拉

Html 引导下拉按钮没有';t使用引导4进行下拉,html,jquery,bootstrap-4,drop-down-menu,popper.js,Html,Jquery,Bootstrap 4,Drop Down Menu,Popper.js,我正在使用引导创建一个flask应用程序。我试图使用一个需要jquery+popper的元素,比如下拉菜单。按钮出现了,但没有掉下来 <!doctype html> <html lang="en"> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport

我正在使用引导创建一个flask应用程序。我试图使用一个需要jquery+popper的元素,比如下拉菜单。按钮出现了,但没有掉下来

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="/static/node_modules/bootstrap/dist/css/bootstrap.min.css">

    <title>hello world</title>
  </head>

   <div class="dropdown">
   <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      Dropdown button
   </button>
   <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
      <a class="dropdown-item" href="#">Action</a>
      <a class="dropdown-item" href="#">Another action</a>
      <a class="dropdown-item" href="#">Something else here</a>
   </div>
   </div>

    <script src="/static/node_modules/jquery/dist/jquery.min.js"</script>
    <script src="/static/node_modules/popper.js/dist/popper.min.js" </script>
    <script src="/static/node_modules/bootstrap/dist/js/bootstrap.min.js" </script>
  <body>
</html>

你好,世界
下拉按钮

您忘记关闭index.html中的脚本标记

<script src="/static/node_modules/jquery/dist/jquery.min.js"></script>
<script src="/static/node_modules/popper.js/dist/popper.min.js"></script>
<script src="/static/node_modules/bootstrap/dist/js/bootstrap.min.js"></script>


这三个都以。我还遗漏了什么吗?>我想解释一下这部作品中遗漏了什么,但结果是我还有一个额外的问题——我还导入了“/static/node_modules/popper.js/dist/popper.min.js”,但我需要导入“/static/node_modules/popper.js/dist/umd/popper.min.js”
<script src="/static/node_modules/jquery/dist/jquery.min.js"></script>
<script src="/static/node_modules/popper.js/dist/popper.min.js"></script>
<script src="/static/node_modules/bootstrap/dist/js/bootstrap.min.js"></script>