JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<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>
<script src="https://cdnjs.cloudflare.com/ajax/libs/multi-select/0.9.12/js/jquery.multi-select.min.js"></script>
 


<script>
$(document).ready(function(){
var arrSelected = [];
  
  $(".view-table").hide();

  $("#btn2").click(function(){
    $("ol").append("<li>Appended item</li>");
    $("#id_view_details tbody").append("<tr> <td>"+2+"</td></tr>");
  });
  
  /* $('#multiselect1').on('change', function(){
    var selected = $(this).find("option:selected");
    
    selected.each(function(){
    if(arrSelected.indexOf($(this).val())){
       arrSelected.push($(this).val());}
       $(".view-table").show();
               $("#id_view_details tbody").append("<tr><td>"+$(this).val()+"</td></tr>")
    });
    console.log(arrSelected);
    
  }); */
  $('#multiselect1').on('change', function(){
var selected = $('#multiselect1').val();
if(selected){
$(".view-table").show();
$("#id_view_details tbody").append("<tr> <td>"+selected+"</td></tr>");
}
});
  
});
</script>
</head>
<body>




<div class="form-group">
   <select id="multiselect1" class="selectpicker" id="drop" multiple data-live-search="true">
  <option>Mustard</option>
  <option>Ketchup</option>
  <option>Relish</option>
</select>
</div>
 <div class="form-group view-table">
                <label for="view_detail">Views: </label>
            <table class="table table-sm table-hover" id="id_view_details" >
                <thead>
                <tr>
         ...