JSFiddle - React, Tailwind, and code Playground

HTML

<div class="slide-out-div">test
    <!-- Start liveperson code -->
    <!-- End Liveperson code -->
</div>

JavaScript

$(document).ready(function () {

    var d = new Date();
    var dayOfWeek = d.getDay();
    var hour = d.getHours();

    if (dayOfWeek === 6 || dayOfWeek === 0 || hour <= 11 || hour >= 17) {
        $('.slide-out-div').hide();
    }

});