JSFiddle - React, Tailwind, and code Playground

HTML

<img class="img-responsive" id ="thumbnailtest" src="http://www.gettyimages.in/gi-resources/images/Homepage/Category-Creative/UK/UK_Creative_462809583.jpg">

CSS

.scaleout {
    transform: scale(1, 0.80);
-ms-transform: scale(1, 0.80);
-webkit-transform: scale(1, 0.80);

}

JavaScript

$(document).ready(function(){
$( "#thumbnailtest" ).hover(    
  function() {    
    $(this).addClass("scaleout");
  }, function() {
    $(this).removeClass("scaleout");
  }
);
});