Multi select plugin does not select

Question

Using bootstrap multi-select.jsto select multiple options from the selection window. I tried when I click on the button a few options that are not selectable. below is my code:

// bootstrap multiselect box
$(document).ready(function() {
  $('#ddlPermission').multiselect({
    buttonWidth : '100%',
    maxHeight : 100,
    includeSelectAllOption : true,
    dropRight : true
  });  
  $(".clickbutton").click(function(){	
  	$('.multiselect').val(['A','B']);
  });  
});
function myFunction() {
  var allVal=$("#ddlPermission").val();
  alert(allVal);
  return false;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="https://davidstutz.imtqy.com/bootstrap-multiselect/dist/js/bootstrap-multiselect.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/js/bootstrap.js"></script>
<link href="http://davidstutz.imtqy.com/bootstrap-multiselect/dist/css/bootstrap-multiselect.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.css" rel="stylesheet"/>
<div class="container-fluid">
<div class="row">
<div class="col-sm-2">
<input class="form-control btn-primary clickbutton" type="button" name="select" id="select" value="Click">
</div>
</div>
<br>
<select id="ddlPermission" class="multiselect" multiple="multiple" name="permission_ddl">
  <option value="A">A</option>
  <option value="B">B</option>
  <option value="C">C</option>
  <option value="D">D</option>
</select>
<input type="submit" name="btnSubmit" id="btnSubmit" onclick="myFunction()" class="button active" value="Submit">
</div>

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Answer 1

You need to apply the selection to the drop-down menu idinstead class, and then update the multi- selection .

$('#ddlPermission').val(['A','B']);
$('#ddlPermission').multiselect("refresh");

// bootstrap multiselect box
$(document).ready(function() {
  $('#ddlPermission').multiselect({
    buttonWidth : '100%',
    maxHeight : 100,
    includeSelectAllOption : true,
    dropRight : true
  });  
  $(".clickbutton").click(function(){	
  	$('#ddlPermission').val(['A','B']);
        $('#ddlPermission').multiselect("refresh");
  });  
});
function myFunction() {
  var allVal=$("#ddlPermission").val();
  alert(allVal);
  return false;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/js/bootstrap.js"></script>
<script src="https://davidstutz.imtqy.com/bootstrap-multiselect/dist/js/bootstrap-multiselect.js"></script>
<link href="http://davidstutz.imtqy.com/bootstrap-multiselect/dist/css/bootstrap-multiselect.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.css" rel="stylesheet"/>
<div class="container-fluid">
<div class="row">
<div class="col-sm-2">
<input class="form-control btn-primary clickbutton" type="button" name="select" id="select" value="Click">
</div>
</div>
<br>
<select id="ddlPermission" class="multiselect" multiple="multiple" name="permission_ddl">
  <option value="A">A</option>
  <option value="B">B</option>
  <option value="C">C</option>
  <option value="D">D</option>
</select>
<input type="submit" name="btnSubmit" id="btnSubmit" onclick="myFunction()" class="button active" value="Submit">
</div>

Run code