JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/flexslider/2.5.0/jquery.flexslider-min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/flexslider/2.5.0/flexslider.css">
<div id="menu" class="menu">
    <ul class="headlines">
        <li id="item1">
            <button>aaaaaaaa</button>
        </li>
        <li id="item2">
            <button>bbbbbbb</button>
        </li>
        <li id="item3">
            <button>ccccccc</button>
        </li>
        <li id="item4">
            <button>dddddddd</button>
        </li>
        <li id="item5">
            <button>eeeeeee eee.</button>
        </li>
        <li id="item6">
            <button>ffffff</button>
        </li>
        <li id="item7">
            <button>ggggggg</button>
        </li>
    </ul>
</div>
 <div id="container">
<div id="first" class="inner-container">
   <div id="item11" class="item"> <a name="item11"></a>
       
                <div class="flexslider">
  <ul class="slides">
    <li>
                <img id="image1" src="http://placehold.it/350x150" />
                <img id="image2" src="http://placehold.it/350x150" />
                <img id="image3" src="http://placehold.it/350x150" />
                <img id="image4" src="http://placehold.it/350x150" />
                <img id="image5" src="http://placehold.it/350x150" />
                <img id="image6" src="http://placehold.it/350x150" />
                <img id="image7" src="http://placehold.it/350x150" />
                <img id="image8" src="http://placehold.it/350x150" />
                <img id="image9" src="http://placehold.it/350x150" />
                <img id="image10" src="http://placehold.it/350x150" />
    </li>
    <li>
       <img id="image1" src="http://placehold.it/350x150" />
                <img id="image2" src="http://placehold.it/350x150" />
                <img id="image3" src="http://placehold.it/350x150" />
                <img id="image4" src="http://placehold.it/350x150"...

CSS

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
ol, ul {
    list-style: none;
}
html {
    background-color: #FFFFFF;
    -webkit-font-smoothing: antialiased;
    
}

body.no-vscroll {
    overflow-y:hidden;
}

body {
    background-color: #ffffff;
    font-family:"Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5em;
    color: #545454;
    background-color: #ffffff;
    text-align: center;
    max-width:1600px; 
    overflow-y: scroll;
}
h1, h2, h3, h4, h5, h6 {
    color: #222;
    font-weight: 600;
    line-height: 1.3em;
}
h2 {
    margin-top: 1.3em;
}
.custom-class {
    text-align: right;
    margin-top:-115px;
    margin-right: 26px;
    font-family:"verdana";
   
}
a {
    color: #000000;
    text-decoration: none;
}
b, strong {
    font-weight: 600;
}
samp {
    display: none;
}
img {
    -webkit-animation: colorize 2s cubic-bezier(0, 0, .78, .36) 1;
    animation: colorize 2s cubic-bezier(0, 0, .78, .36) 1;
    background: transparent;
    border-style:none;
    border-radius: 4px;
    display: block;
    margin: 1.3em auto;
    max-width: 95%;
}
.logo {
    text-align: center;
    margin-top:40px;
}
li {
    list-style-type: none;
    font-size: 1.5em;
    padding-top: 8px;
    text-align:center;
    border-style: none;
}


.menu li {
    position: relative;
    top: 180px;
    left: 0px;
}
#item7 {
    transition: opacity .8s, left .8s ease-out;
   ...

JavaScript

$(document).on('click', '#item1', function () {
        $("#container").fadeOut(1000, function () {
            $(".inner-container").hide();
            $("#first").show();
            $("#container").fadeIn(1000, function () {
                $('.flexslider').flexslider({
                    animation: "slide",
                    slideshow: false
                });
            });
        });

    });

    $(document).on('click', '#item2', function () {
        $("#container").fadeOut(1000, function () {
            $(".inner-container").hide();
            $("#second").show();
            $("#container").fadeIn(1000);
        });

    });

    $(document).on('click', '#item3', function () {
        $("#container").fadeOut(1000, function () {
            $(".inner-container").hide();
            $("#third").show();
            $("#container").fadeIn(1000);
        });

    });

    $(".menu").on("click", function () {
        $(".menu").addClass('permahover');

    });


    var $li = $('.headlines li').click(function () {
        var state = !$(this).hasClass('active');
        $(this).parent().toggleClass('active', state);

        $li.removeClass('active');
        $(this).toggleClass('active', state);
    });