JSFiddle - React, Tailwind, and code Playground

HTML

<body data-customvalueone="first Interpreted Jsp Value" data-customvaluetwo="another Interpreted Jsp Value">
    Here is your regular page main content
</body>

JavaScript

jQuery(function(){
    var valuePassedFromJSP = $("body").attr("data-customvalueone");
    var anotherValuePassedFromJSP = $("body").attr("data-customvaluetwo");

    alert(valuePassedFromJSP + " and " + anotherValuePassedFromJSP + " are the values passed from your JSP page");
});