Dropdown Menu Does not Work in Bootstrap 5-CodePudding

Dropdown menu does not work in Bootstrap 5. But when I add some script codes it works.For example:

<script>
    $(document).ready(function() {
        $('.dropdown-toggle').dropdown();
    });
</script>

When I add this code block it works.But my question is: Doesn't Bootstrap have to run the dropdown menus with its own js script without adding additional script codes?

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Focus Education</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA 058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>

<body>
    <div >
        <button  type="button" id="dropdownMenuButton" data-mdb-toggle="dropdown" aria-expanded="false">
      Dropdown button
    </button>
        <ul  aria-labelledby="dropdownMenuButton">
            <li><a  href="#">Action</a></li>
            <li><a  href="#">Another action</a></li>
            <li><a  href="#">Something else here</a></li>
        </ul>
    </div>

</body>
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj 3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
</html>

CodePudding user response：

basically you had a typo/mistake at data-mdb-toggle="dropdown" it should be data-bs-toggle="dropdown" please view the docs for more explaination on the component and apis available.

Below is the working snippet

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Focus Education</title>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA 058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>

<body>
  <div >
    <button  type="button" id="dropdownMenuButton" data-bs-toggle="dropdown" aria-expanded="false">
      Dropdown button
    </button>
    <ul  aria-labelledby="dropdownMenuButton">
      <li><a  href="#">Action</a></li>
      <li><a  href="#">Another action</a></li>
      <li><a  href="#">Something else here</a></li>
    </ul>
  </div>

</body>
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj 3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP JcXn/tWtIaxVXM" crossorigin="anonymous"></script>

</html>