JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html><html><head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Clock Gauge</title>
<style>
html {
	margin: 0px;
}
body {
	margin: 20px 30px;
}
#realchart {
	width: 850px;
	height: 550px;
    border: 1px solid lightgray;
    margin-bottom: 20px;
}
</style>
<link href="https://unpkg.com/realchart/realchart-style.css" rel="stylesheet" crossorigin="anonymous">
<script type="text/javascript" src="https://unpkg.com/realchart/index"></script>
<script type="text/javascript" src="https://unpkg.com/realchart/gauge.js"></script>
<script type="text/javascript">
	window.addEventListener('DOMContentLoaded', function () {
		try {
			init();
		} catch (err) {
			alert(err);
			console.error(err);
		}
	});	
</script>

  <script>
    var realChartLic = 'upVcPE+wPOkOR/egW8JuxkM/nBOseBrflwxYpzGZyYkhw7qfHRQ+GiF0lY62mJi5KBwoSJHOA48O5+/xJSE3LhLB4LkQ8rWX0QeIbtyyIEGTFVqWmNPdyQ==';
  </script>
</head>
<body>
	<div id="realchart"></div>
	

		 </body></html>

JavaScript

const config = {
  gaugeType: 'clock',
  templates: {
    gauge: {
      label: {
        style: {
          fontSize: '12px'
        }
      }
    }
  },
  title: "Multiple Clocks",
  gauge: [{
    template: "gauge",
    name: 'gauge1',
    width: '33%',
    height: '50%',
    left: 0,
    top: 0
  }, {
    template: "gauge",
    name: 'gauge2',
    width: '33%',
    height: '50%',
    left: '33%',
    top: 0,
    timezone: 2 * 60,
    label: {
      text: 'Paris',
      style: {
        fontSize: '15px',
        fontWeight: 'bold',
        fill: 'blue'
      }
    }
  }, {
    template: "gauge",
    name: 'gauge3',
    width: '33%',
    height: '50%',
    left: '66%',
    top: 0,
    timezone: -4 * 60,
    label: {
      text: 'NewYork',
      style: {
        fontSize: '15px',
        fontWeight: 'bold',
        fill: 'blue'
      }
    },
    tick: {
      length: 5
    },
    minorTick: false
  }, {
    template: "gauge",
    name: 'gauge4',
    width: '33%',
    height: '50%',
    left: 0,
    top: '50%'
  }, {
    template: "gauge",
    name: 'gauge5',
    width: '33%',
    height: '50%',
    left: '33%',
    top: '50%',
    minorTick: false,
    hourHand: {
      thickness: 5
    },
    minuteHand: {
      thickness: 3
    },
    secondHand: {
      style: {
        fill: '#333'
      }
    }
  }, {
    template: "gauge",
    name: 'gauge6',
    width: '33%',
    height: '50%',
    left: '66%',
    top: '50%',
    rim: {
      thickness: 5,
      style: {
        stroke: 'none',
        fill: '#333'
      }
    },
    hourHand: {
      thickness: 5
    },
    minuteHand: {
      thickness: 3
    },
    secondHand: false,
    tickLabel: {
      step: 3
    },
    label: {
      position: 'bottom'
    }
  }]
};
let animate = false;
let chart;
function init() {
  chart = RealChart.createChart(document, 'realchart', config);
}