Bootstrap 4 multiselect dropdown

Question

I read on many forums that the problem of select and multiselect has been resolved after the beta version of bootstrap 4.

Unfortunately I am unable to display the multiselect as in (bootstrap 3) in (bootstrap 4).

Bootstrap 3 Snippet

$('select').selectpicker();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.8.1/css/bootstrap-select.css">  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.8.1/js/bootstrap-select.js"></script>  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>    <select class="selectpicker" multiple data-live-search="true">    <option>Mustard</option>    <option>Ketchup</option>    <option>Relish</option>  </select>

Bootstrap 4 Snippet

$('select').selectpicker();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script>    <select class="selectpicker" multiple data-live-search="true">    <option>Mustard</option>    <option>Ketchup</option>    <option>Relish</option>  </select>

Answer 1

Because the bootstrap-select is a Bootstrap component and therefore you need to include it in your code as you did for your V3

NOTE: this component only works in bootstrap-4 since version 1.13.0

$('select').selectpicker();

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.1/css/bootstrap-select.css" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.1/js/bootstrap-select.min.js"></script>  <select class="selectpicker" multiple data-live-search="true">   <option>Mustard</option>   <option>Ketchup</option>   <option>Relish</option> </select>