JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.camerons4fish.com/images/menu-btn-normal.png" alt="" class="swap">

CSS

img {
    cursor: pointer;
}

JavaScript

$(".swap").hover(function() {
    $(this).attr("src", function(i, val) {
        return val.indexOf("hover") == -1
          ? val.replace("normal", "hover")
          : val.replace("hover", "normal");
    });
});