JSFiddle - React, Tailwind, and code Playground

HTML

<img id="myimage" src="data:image/png;base64,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" width="100" height="25" />
<br />
<br />
<button id="mybutton">Toggle image opacity</button>

JavaScript

$(document).ready(function() {
            $("#mybutton").bind("click", function() {
                if ($("#myimage").css("opacity") != "0.5")
                    $("#myimage").css("opacity", "0.5");
                else
                    $("#myimage").css("opacity", "1.0");
            });
        });