@amcharts/amcharts4/examples/javascript/timeline/spiral-chart/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";
import am4plugins_timeline from "@amcharts/amcharts4/plugins/timeline";



am4core.useTheme(am4themes_animated);

let chart = am4core.create("chartdiv", am4plugins_timeline.SpiralChart);
chart.levelCount = 3;
chart.curveContainer.padding(40,40,40,40);

let data = [];
let visits = 100;
for (let i = 0; i < 30; i++) {
  visits += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 20);
  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.renderer.line.disabled = true;
dateAxis.cursorTooltipEnabled = false;
dateAxis.renderer.minGridDistance = 30;
dateAxis.minZoomCount = 5;

let labelTemplate = dateAxis.renderer.labels.template;
labelTemplate.fontSize = 10;
labelTemplate.verticalCenter = "middle";
labelTemplate.horizontalCenter = "middle";
labelTemplate.padding(3, 3, 3, 3);

labelTemplate.adapter.add("rotation", (rotation, target) => {
  let value = target.dataItem.value;
  let endvalue = target.dataItem.endValue;

  let position = dateAxis.valueToPosition(value + (endvalue - value) / 2);

  let angle = dateAxis.renderer.positionToAngle(position);
  return angle;
})


let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.tooltip.disabled = true;
valueAxis.renderer.innerRadius = -25;
valueAxis.renderer.radius = 25;
valueAxis.renderer.minGridDistance = 15;
valueAxis.renderer.axisLocation = 1;


let valueAxisLabelTemplate = valueAxis.renderer.labels.template;
valueAxisLabelTemplate.rotation = - 90;
valueAxisLabelTemplate.fontSize = 10;
valueAxisLabelTemplate.horizontalCenter = "left";


valueAxisLabelTemplate.adapter.add("rotation", (rotation, target) => {
  return dateAxis.renderer.positionToAngle(1) - 90;
})

chart.seriesContainer.zIndex = -1;

let series = chart.series.push(new am4plugins_timeline.CurveColumnSeries());
series.dataFields.dateX = "date";
series.dataFields.valueY = "value";
series.tooltipText = "{valueY}";
series.tooltip.pointerOrientation = "vertical";
series.tooltip.background.fillOpacity = 0.7;
series.strokeWidth = 2;

chart.cursor = new am4plugins_timeline.CurveCursor();
chart.cursor.xAxis = dateAxis;
chart.cursor.yAxis = valueAxis;
chart.cursor.lineY.disabled = true;

chart.scrollbarX = new am4core.Scrollbar();
chart.scrollbarX.width = am4core.percent(80);
chart.scrollbarX.align = "center";