@amcharts/amcharts5/examples/javascript/xy-line-highlight-on-legend-hover/index.js

amCharts 5

import * as am5 from "@amcharts/amcharts5";
import * as am5xy from "@amcharts/amcharts5/xy";
import am5themes_Animated from "@amcharts/amcharts5/themes/Animated";


// Create root element
// https://www.amcharts.com/docs/v5/getting-started/#Root_element 
const root = am5.Root.new("chartdiv");


// Set themes
// https://www.amcharts.com/docs/v5/concepts/themes/ 
root.setThemes([
  am5themes_Animated.new(root)
]);


// Create chart
// https://www.amcharts.com/docs/v5/charts/xy-chart/
let chart = root.container.children.push(
  am5xy.XYChart.new(root, {
    panX: false,
    panY: false,
    wheelX: "panX",
    wheelY: "zoomX",
    maxTooltipDistance: 0
  })
);


let date = new Date();
date.setHours(0, 0, 0, 0);
let value = 100;

function generateData() {
  value = Math.round((Math.random() * 10 - 4.2) + value);
  am5.time.add(date, "day", 1);
  return {
    date: date.getTime(),
    value: value
  };
}

function generateDatas(count) {
  let data = [];
  for (let i = 0; i < count; ++i) {
    data.push(generateData());
  }
  return data;
}


// Create axes
// https://www.amcharts.com/docs/v5/charts/xy-chart/axes/
let xAxis = chart.xAxes.push(
  am5xy.DateAxis.new(root, {
    maxDeviation: 0,
    baseInterval: {
      timeUnit: "day",
      count: 1
    },
    renderer: am5xy.AxisRendererX.new(root, {
      minorGridEnabled: true
    }),
    tooltip: am5.Tooltip.new(root, {})
  })
);

let yAxis = chart.yAxes.push(
  am5xy.ValueAxis.new(root, {
    renderer: am5xy.AxisRendererY.new(root, {})
  })
);


// Add series
// https://www.amcharts.com/docs/v5/charts/xy-chart/series/
for (let i = 0; i < 10; i++) {
  let series = chart.series.push(am5xy.LineSeries.new(root, {
    name: "Series " + i,
    xAxis: xAxis,
    yAxis: yAxis,
    valueYField: "value",
    valueXField: "date",
    legendValueText: "{valueY}",
    tooltip: am5.Tooltip.new(root, {
      labelText: "{valueY}",
      pointerOrientation: "horizontal"
    })
  }));

  date = new Date();
  date.setHours(0, 0, 0, 0);
  value = 0;

  let data = generateDatas(100);
  series.data.setAll(data);

  // Make stuff animate on load
  // https://www.amcharts.com/docs/v5/concepts/animations/
  series.appear();
}


// Add cursor
// https://www.amcharts.com/docs/v5/charts/xy-chart/cursor/
let cursor = chart.set("cursor", am5xy.XYCursor.new(root, {
  behavior: "zoomX"
}));
cursor.lineY.set("visible", false);


// Add scrollbar
// https://www.amcharts.com/docs/v5/charts/xy-chart/scrollbars/
chart.set("scrollbarX", am5.Scrollbar.new(root, {
  orientation: "horizontal"
}));

chart.set("scrollbarY", am5.Scrollbar.new(root, {
  orientation: "vertical"
}));


// Add legend
// https://www.amcharts.com/docs/v5/charts/xy-chart/legend-xy-series/
let legend = chart.rightAxesContainer.children.push(
  am5.Legend.new(root, {
    width: 200,
    paddingLeft: 15,
    height: am5.percent(100)
  })
);

// When legend item container is hovered, dim all the series except the hovered one
legend.itemContainers.template.events.on("pointerover", function(e) {
  let itemContainer = e.target;

  // As series list is data of a legend, dataContext is series
  let series = itemContainer.dataItem.dataContext;

  chart.series.each(function(chartSeries) {
    if (chartSeries != series) {
      chartSeries.strokes.template.setAll({
        strokeOpacity: 0.15,
        stroke: am5.color(0x000000)
      });
    } else {
      chartSeries.strokes.template.setAll({
        strokeWidth: 3
      });
    }
  })
})

// When legend item container is unhovered, make all series as they are
legend.itemContainers.template.events.on("pointerout", function(e) {
  let itemContainer = e.target;
  let series = itemContainer.dataItem.dataContext;

  chart.series.each(function(chartSeries) {
    chartSeries.strokes.template.setAll({
      strokeOpacity: 1,
      strokeWidth: 1,
      stroke: chartSeries.get("fill")
    });
  });
})

legend.itemContainers.template.set("width", am5.p100);
legend.valueLabels.template.setAll({
  width: am5.p100,
  textAlign: "right"
});

// It's is important to set legend data after all the events are set on template, otherwise events won't be copied
legend.data.setAll(chart.series.values);


// Make stuff animate on load
// https://www.amcharts.com/docs/v5/concepts/animations/#Forcing_appearance_animation
chart.appear(1000, 100);