JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.6/Chart.min.js"></script>
<div class="container-fluid">
  <div id="myNav1" class="overlay">
  <a href="javascript:void(0)" class="closebtn" onclick="closeNav1()">×</a>
  <div class="overlay-content">

<script>
    

    var year1 = ['FIRST','SECOND','THIRD', 'FOURTH' , 'FIFTH'];
    var data_viewer = <?php echo $viewer; ?>;
    var data_viewer1 = <?php echo $viewer1; ?>;
    var data_viewer2 = <?php echo $viewer2; ?>;
    var data_viewer3 = <?php echo $viewer3; ?>;
    var data_viewer4 = <?php echo $viewer4; ?>;
    var data_viewer5 = <?php echo $viewer5; ?>;
    var data_click = <?php echo $click; ?>;
    var data_click1 = <?php echo $click1; ?>;
    var data_click2 = <?php echo $click2; ?>;
    var data_click3 = <?php echo $click3; ?>;
    var data_click4 = <?php echo $click4; ?>;
    var data_click5 = <?php echo $click5; ?>;

    
   

    var barChartData1 = {

        labels: year1,

        datasets: [{

            label: 'STUDS',

            backgroundColor: "rgba(65,105,225,0.5)",

            data: data_click

        }, {

            label: 'ANGELS',

            backgroundColor: "rgba(255,105,180,0.5)",

            data: data_viewer

        }],

      

    };

    


    function chart1(){

        var ctx1 = document.getElementById("canvas1").getContext("2d");

        var myBar1 = new Chart(ctx1, {
         

            type: 'horizontalBar',

            data: barChartData1,

            options: {

                elements: {

                    rectangle: {

                        borderWidth: 2,

                        borderColor: 'rgb(169, 169, 169)',

                        borderSkipped: 'bottom'

                      

                    }

                },

                scales: {
                xAxes: [{
                    ticks: {
                       ...

CSS

/* The Overlay (background) */
.overlay {
    /* Height & width depends on how you want to reveal the overlay (see JS below) */    
    height: 100%;
    width: 0;
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    background-color: rgb(0,0,0); /* Black fallback color */
    background-color: rgba(0,0,0, 0.9); /* Black w/opacity */
    overflow-x: hidden; /* Disable horizontal scroll */
    transition: 0.5s; /* 0.5 second transition effect to slide in or slide down the overlay (height or width, depending on reveal) */
}

/* Position the content inside the overlay */
.overlay-content {
    position: relative;
    top: 25%; /* 25% from the top */
    width: 100%; /* 100% width */
    text-align: center; /* Centered text/links */
    margin-top: 30px; /* 30px top margin to avoid conflict with the close button on smaller screens */
}

/* The navigation links inside the overlay */
.overlay a {
    padding: 8px;
    text-decoration: none;
    font-size: 36px;
    color: #818181;
    display: block; /* Display block instead of inline */
    transition: 0.3s; /* Transition effects on hover (color) */
}

/* When you mouse over the navigation links, change their color */
.overlay a:hover, .overlay a:focus {
    color: #f1f1f1;
}

/* Position the close button (top right corner) */
.overlay .closebtn {
    position: absolute;
    top: 20px;
    right: 45px;
    font-size: 60px;
}

/* When the height of the screen is less than 450 pixels, change the font-size of the links and position the close button again, so they don't overlap */
@media screen and (max-height: 450px) {
    .overlay a {font-size: 20px}
    .overlay .closebtn {
        font-size: 40px;
        top: 15px;
        right: 35px;
    }
}