@amcharts/amcharts4/examples/javascript/data-grouping-50K/index.js

amCharts 4

import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";


am4core.useTheme(am4themes_animated);

let chart = am4core.create("chartdiv", am4charts.XYChart);
chart.paddingRight = 20;

let data = [];
let visits = 10;
for (let i = 1; i < 50000; i++) {
  visits += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 10);
  data.push({ date: new Date(2018, 0, i), value: visits });
}

chart.data = data;

let dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.minZoomCount = 5;

// this makes the data to be grouped
dateAxis.groupData = true;
//dateAxis.groupCount = 200;

let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

let series = chart.series.push(new am4charts.LineSeries());
series.dataFields.dateX = "date";
series.dataFields.valueY = "value";
series.tooltipText = "{valueY}";
series.tooltip.pointerOrientation = "vertical";
series.tooltip.background.fillOpacity = 0.5;

chart.cursor = new am4charts.XYCursor();
chart.cursor.xAxis = dateAxis;

let scrollbarX = new am4core.Scrollbar();
chart.scrollbarX = scrollbarX;