JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="upload_widget_opener">Upload multiple images</a>

<script src="https://widget.cloudinary.com/v2.0/global/all.js" type="text/javascript"></script>  

<script type="text/javascript">  
  var myUploadWidget;
  document.getElementById("upload_widget_opener").addEventListener("click", function() {
    myUploadWidget = cloudinary.openUploadWidget({ 
      cloudName: 'duinrs7ev', uploadPreset: 'gkapdwoz'}, (error, result) => { });
  }, false);
</script>