JSFiddle - React, Tailwind, and code Playground

HTML

<div id="extra">This is the answer to the FAQ question</div>
<div id="checkme">This is the question</div>

JavaScript

$(document).ready(function () {

    //Hide div w/id extra
    $("#extra").css("display", "none");

    // Add onclick handler to checkbox w/id checkme
    $("#checkme").click(function () {

        // If checked
        if ($("#checkme").is(":checked")) {
            //show the hidden div
            $("#extra").show("fast");
        } else {
            //otherwise, hide it
            $("#extra").hide("fast");
        }
    });

});