JSFiddle - React, Tailwind, and code Playground

bootstrap modal popup example on load.

by DugSohn

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Button trigger modal -->
<button type="button" id="mymodal" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header bg-primary">
        <button type="button" class="btn btn-sm btn-default pull-right " data-dismiss="modal" aria-label="Close"><i class="fa fa-remove"></i></button>
        <h4 class="modal-title " id="myModalLabel"><i class="fa fa-download"></i> Export Data Options</h4>
      </div>
      <div class="modal-body">
        
        <h4>
        Export Format
        </h4>
        
        <div class="btn btn-group">
        <button class="btn btn-default">
         <i class="fa fa-file-excel-o"></i> Excel
        </button>
          <button class="btn btn-default">
         <i class="fa fa-file-pdf-o"></i> PDF
        </button>
          <button class="btn btn-default" title="Export Data, Attachements and Logs">
        <i class="fa fa-archive"></i> Full Archive
        </button>
        </div>
        <hr>
        <h4>
        Export Child Records
        </h4>
        <select class="form-control" disabled>
  <option>-- None Available --</option>


</select>
  <div class="help-block">
  Export  full associated child records when present in rows
  </div>
        <hr>
        <h4>
        Column Options
        </h4>
         <div class="checkbox">
        <label>
          <input type="checkbox">
        Export All Columns

        </label>
                <div class="help-block">
   ...

CSS

.modal-dialog {
  width: 400px;
}

JavaScript

jQuery(document).ready(function(e) {
    jQuery('#mymodal').trigger('click');
});