Live data

by amcharts

HTML

<script src="https://www.amcharts.com/lib/4/core.js"></script>
<script src="https://www.amcharts.com/lib/4/charts.js"></script>
<script src="https://www.amcharts.com/lib/4/themes/animated.js"></script>
<div id="chartdiv"></div>

CSS

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

#chartdiv {
  width: 100%;
  height: 500px;
}

JavaScript

/**
 * ---------------------------------------
 * This demo was created using amCharts 4.
 * 
 * For more information visit:
 * https://www.amcharts.com/
 * 
 * Documentation is available at:
 * https://www.amcharts.com/docs/v4/
 * ---------------------------------------
 */

// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

var chart = am4core.create("chartdiv", am4charts.XYChart);
chart.hiddenState.properties.opacity = 0;

chart.padding(0, 0, 0, 0);

chart.zoomOutButton.disabled = true;

var data = [];
var visits = 10;
var i = 0;

for (i = 0; i <= 100; i++) {
    visits -= Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 10);
    data.push({ date: new Date().setSeconds(i - 30), value: visits });
}

chart.data = data;

var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 30;
dateAxis.dateFormats.setKey("second", "ss");
dateAxis.periodChangeDateFormats.setKey("second", "[bold]h:mm a");
dateAxis.periodChangeDateFormats.setKey("minute", "[bold]h:mm a");
dateAxis.periodChangeDateFormats.setKey("hour", "[bold]h:mm a");
dateAxis.renderer.inside = true;
dateAxis.renderer.axisFills.template.disabled = true;
dateAxis.renderer.ticks.template.disabled = true;

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.tooltip.disabled = true;
//valueAxis.interpolationDuration = 500;
//valueAxis.rangeChangeDuration = 500;
//valueAxis.renderer.inside = true;
//valueAxis.renderer.minLabelPosition = 0.05;
//valueAxis.renderer.maxLabelPosition = 0.95;
//valueAxis.renderer.axisFills.template.disabled = true;
//valueAxis.renderer.ticks.template.disabled = true;

var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.dateX = "date";
series.dataFields.valueY = "value";
//series.interpolationDuration = 500;
//series.defaultState.transitionDuration = 0;
//series.tensionX = 0.8;

chart.events.on("datavalidated", function () {
   ...