I’m trying to show a dropdown via JS. Unfortunately it seems like there’s a bug in Bootstrap 5.
In this example code, showing the modal works, but showing the dropdown throws an exception: Uncaught TypeError: Cannot read property 'classList' of undefined at _e.show (dropdown.js:140)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css"> </head> <body> <div id="testDropdown" class="dropdown"> <button class="btn btn-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown"> Dropdown button </button> <ul class="dropdown-menu"> <li><a class="dropdown-item" href="#">Action</a></li> <li><a class="dropdown-item" href="#">Another action</a></li> <li><a class="dropdown-item" href="#">Something else here</a></li> </ul> </div> <div id="testModal" class="modal" tabindex="-1"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <h5 class="modal-title">Modal title</h5> <button type="button" class="btn-close" data-bs-dismiss="modal"></button> </div> <div class="modal-body"> <p>Modal body text goes here.</p> </div> </div> </div> </div> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"></script> <script> let testModal = document.getElementById("testModal"); //new bootstrap.Modal(testModal).show(); //works let testDropdown = document.getElementById("testDropdown"); new bootstrap.Dropdown(testDropdown).show(); //doesnt work </script> </body> </html>
Am I doing something wrong or is this a bug?
Thanks in advance.
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Answer
I got it working without using a button:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Dropdown Test</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.4.1/font/bootstrap-icons.css"> </head> <body> <div class="container-fluid"> <div class="row justify-content-center"> <div class="w-75 mt-2"> <div class="input-group"> <span class="input-group-text"><i class="bi bi-search"></i></span> <input type="text" class="form-control" placeholder="Search for something"> <button class="btn btn-primary" type="button">Search</button> </div> <div class="dropdown"> <div data-bs-toggle="dropdown" id="DROPDOWN_SEARCH"></div> <div class="dropdown-menu w-100"> <a class="dropdown-item" href="#">Result 1</a> <a class="dropdown-item" href="#">Result 2</a> <a class="dropdown-item" href="#">Result 3</a> </div> </div> </div> </div> </div> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"></script> <script> let searchDropdown = new bootstrap.Dropdown("#DROPDOWN_SEARCH"); searchDropdown.show(); </script> </body> </html>