<div class="form-group">
<label for="exampleSelect">Example select</label>
<select class="form-control" id="exampleSelect">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div><select class="custom-select">
<option selected>Open this select menu</option>
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
</select><div class="form-group">
<label for="exampleSelect">Example select</label>
<select class="form-control" id="exampleSelect">
<option value="" selected>1</option>
<option value="">2</option>
<option value="">3</option>
<option value="">4</option>
<option value="">5</option>
</select>
</div><div class="btn-group btn-group-toggle" data-toggle="buttons">
<label class="btn btn-secondary active">
<input type="radio" name="options" id="option1" autocomplete="off" checked> Active
</label>
<label class="btn btn-secondary">
<input type="radio" name="options" id="option2" autocomplete="off"> Radio
</label>
<label class="btn btn-secondary">
<input type="radio" name="options" id="option3" autocomplete="off"> Radio
</label>
</div>$(function () {
$('select').selectpicker();
});