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CSS

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HTML 

              
                <script src="https://cdn.amcharts.com/lib/4/core.js"></script>
<script src="https://cdn.amcharts.com/lib/4/charts.js"></script>
<script src="https://cdn.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";
  background-color: #dedede;
}


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

JS 

              
                /**
 * ---------------------------------------
 * 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.ChordDiagram);
var currentNode;
var currentLink;

chart.padding(10, 10, 10, 10);
// colors of main characters
chart.colors.saturation = 0.45;
chart.colors.step = 3;
var colors = {
  Rachel: chart.colors.next(),
  Monica: chart.colors.next(),
  Phoebe: chart.colors.next(),
  Ross: chart.colors.next(),
  Joey: chart.colors.next(),
  Chandler: chart.colors.next()
};

// data was provided by: https://www.reddit.com/user/notrudedude

chart.data = [
  // node property fields take data from data items where they are first mentioned, that's
  // why we add empty data items at the beginning and set colors here
  { from: "Monica", image: "monica.png", color: colors.Monica },
  { from: "Rachel", image: "rachel.png", color: colors.Rachel },
  { from: "Chandler", image: "chandler.png", color: colors.Chandler },
  { from: "Ross", image: "ross.png", color: colors.Ross },
  { from: "Joey", color: colors.Joey, image: "joey.png" },
  { from: "Phoebe", image: "phoebe.png", color: colors.Phoebe },

  // real data
  { from: "Monica", to: "Rachel", value: 4 },
  { from: "Monica", to: "Chandler", value: 113 },
  { from: "Monica", to: "Ross", value: 16 },
  { from: "Monica", to: "Joey", value: 9 },
  { from: "Monica", to: "Phoebe", value: 3 },
  { from: "Monica", to: "Paul the wine guy", value: 1 },
  { from: "Monica", to: "Mr Geller", value: 6 },
  { from: "Monica", to: "Mrs Geller", value: 5 },
  { from: "Monica", to: "Aunt Lilian", value: 1 },
  { from: "Monica", to: "Nana", value: 1 },
  { from: "Monica", to: "Young Ethan", value: 5 },
  { from: "Monica", to: "Ben", value: 3 },
  { from: "Monica", to: "Fun Bobby", value: 3 },
  { from: "Monica", to: "Richard", value: 16 },
  { from: "Monica", to: "Mrs Green", value: 1 },
  { from: "Monica", to: "Paolo2", value: 1 },
  { from: "Monica", to: "Pete", value: 10 },
  { from: "Monica", to: "Chip", value: 1 },
  { from: "Monica", to: "Timothy (Burke)", value: 1 },
  { from: "Monica", to: "Emily", value: 1 },
  { from: "Monica", to: "Dr. Roger", value: 3 },
  { from: "Rachel", to: "Chandler", value: 7 },
  { from: "Rachel", to: "Ross", value: 80 },
  { from: "Rachel", to: "Joey", value: 30 },
  { from: "Rachel", to: "Phoebe", value: 6 }
];

chart.dataFields.fromName = "from";
chart.dataFields.toName = "to";
chart.dataFields.value = "value";

chart.nodePadding = 0.5;
chart.minNodeSize = 0.01;
chart.startAngle = 80;
chart.endAngle = chart.startAngle + 360;
chart.sortBy = "value";
chart.fontSize = 10;

var nodeTemplate = chart.nodes.template;
nodeTemplate.readerTitle = "Click to show/hide or drag to rearrange";
nodeTemplate.showSystemTooltip = true;
nodeTemplate.propertyFields.fill = "color";
nodeTemplate.tooltipText = "{name}'s kisses: {total}";


// EVENT:CLICK -> Disable default click behavior and enable new behavior
nodeTemplate.properties.fillOpacity = 0.4; // default styles
nodeTemplate.properties.strokeWidth = 1;
nodeTemplate.properties.strokeOpacity = 0;
//nodeTemplate.properties.stroke = am4core.color('#000');

nodeTemplate.events.off("hit");
nodeTemplate.events.on("hit", function (event) {
  var node = event.target;
  toggleNode(node);
});

// HOVER
createHoverState(nodeTemplate);
// when rolled over the node, make all the links rolled-over
nodeTemplate.events.on("over", function (event) {
  var node = event.target;
  node.outgoingDataItems.each(function (dataItem) {
    if (dataItem.toNode) {
      dataItem.link.isHover = true;
      dataItem.toNode.label.isHover = true;
    }
  });
  node.incomingDataItems.each(function (dataItem) {
    if (dataItem.fromNode) {
      dataItem.link.isHover = true;
      dataItem.fromNode.label.isHover = true;
    }
  });

  node.label.isHover = true;
});
nodeTemplate.events.off("out");
nodeTemplate.events.on("out", function (event) {
  var node = event.target;
   node.outgoingDataItems.each(function (dataItem) {
    if (dataItem.toNode) {
      dataItem.link.isHover = false;
      dataItem.toNode.label.isHover = false;
    }
  });
  node.incomingDataItems.each(function (dataItem) {
    if (dataItem.fromNode) {
      dataItem.link.isHover = false;
      dataItem.fromNode.label.isHover = false;
    }
  });
  setTimeout(() => {
    keepSelected();
  }, 10);
});

var label = nodeTemplate.label;
label.relativeRotation = 90;

label.fillOpacity = 0.4;
let labelHS = label.states.create("hover");
labelHS.properties.fillOpacity = 1;

nodeTemplate.cursorOverStyle = am4core.MouseCursorStyle.pointer;
// this adapter makes non-main character nodes to be filled with color of the main character which he/she kissed most
nodeTemplate.adapter.add("fill", function (fill, target) {
  let node = target;
  let counters = {};
  let mainChar = false;
  node.incomingDataItems.each(function (dataItem) {
    if (colors[dataItem.toName]) {
      mainChar = true;
    }

    if (isNaN(counters[dataItem.fromName])) {
      counters[dataItem.fromName] = dataItem.value;
    } else {
      counters[dataItem.fromName] += dataItem.value;
    }
  });
  if (mainChar) {
    return fill;
  }

  let count = 0;
  let color;
  let biggest = 0;
  let biggestName;

  for (var name in counters) {
    if (counters[name] > biggest) {
      biggestName = name;
      biggest = counters[name];
    }
  }
  if (colors[biggestName]) {
    fill = colors[biggestName];
  }

  return fill;
});

// link template
var linkTemplate = chart.links.template;
linkTemplate.strokeOpacity = 0;
linkTemplate.fillOpacity = 0.15;
linkTemplate.tooltipText = "{fromName} & {toName}:{value.value}";
//https://www.amcharts.com/docs/v4/tutorials/manipulating-mouse-cursor-style/
linkTemplate.cursorOverStyle = am4core.MouseCursorStyle.pointer;

createHoverState(linkTemplate);

linkTemplate.events.off("hit");
linkTemplate.events.on("hit", function (event) {
  var link = event.target;
  toggleLink(link);
});
linkTemplate.events.on("over", function (event) {
  var link = event.target;
  link.dataItem.fromNode.isHover = true;
  link.dataItem.toNode.isHover = true;
});
linkTemplate.events.on("out", function (event) {
  var link = event.target;
  link.dataItem.fromNode.isHover = false;
  link.dataItem.toNode.isHover = false;
  
  setTimeout(() => {
    keepSelected();
  }, 10);
});

// data credit label
var creditLabel = chart.chartContainer.createChild(am4core.TextLink);
creditLabel.text = "Data source: notrudedude";
creditLabel.url = "https://www.reddit.com/user/notrudedude";
creditLabel.y = am4core.percent(99);
creditLabel.x = am4core.percent(99);
creditLabel.horizontalCenter = "right";
creditLabel.verticalCenter = "bottom";

var titleImage = chart.chartContainer.createChild(am4core.Image);
titleImage.href = "//www.amcharts.com/wp-content/uploads/2018/11/whokissed.png";
titleImage.x = 30;
titleImage.y = 30;
titleImage.width = 200;
titleImage.height = 200;

function createHoverState(item) {
  var state = item.states.create("hover");
  state.properties.fillOpacity = 0.7;
  state.properties.strokeOpacity = 0.7;
}

function setSelectedState(element) {
  if (!element.states.hasKey("selected")) {
    var state = element.states.create("selected");
    state.properties.fillOpacity = 1;
    state.properties.strokeOpacity = 1;
    // state.properties.stroke = am4core.color("#000", 0.5);
    state.properties.scale = 1.025;
  }
  element.setState("selected");
}

function setRelatedState(element) {
  if (!element.states.hasKey("related")) {
    var state = element.states.create("related");
    state.properties.fillOpacity = 1;
    state.properties.strokeOpacity = 1;
    state.properties.scale = 1.025;
    //state.properties.stroke = am4core.color("#ff0000");
  }
  element.setState("related");
}

function selectNode(node) {
  currentLink = null;
  currentNode = node;
  setSelectedState(currentNode);
  node.incomingDataItems.each(function (dataItem) {
    setRelatedState(dataItem.link);
  });
  node.outgoingDataItems.each(function (dataItem) {
    setRelatedState(dataItem.link);
  });
}

function toggleNode(node) {
  resetSelectedState();
  if (node === currentNode) {
    currentNode = null;
  } else {
    selectNode(node);
  }
}

function selectLink(link) {
  currentNode = null;
  currentLink = link;
  setSelectedState(currentLink);
  setRelatedState(link.dataItem.fromNode);
  setRelatedState(link.dataItem.toNode);
}

function toggleLink(link) {
  resetSelectedState();
  if (link === currentLink) {
    currentLink = null;
  } else {
    selectLink(link);
  }
}

function resetSelectedState() {
  setStateWithChildren(currentNode);
  setStateWithChildren(currentLink);
}

function setStateWithChildren(element, stateName) {
  if (!element) {
    return;
  }
  if (!stateName) {
    stateName = "default";
  }
  element.setState(stateName);

  if (element.incomingDataItems) {
    element.incomingDataItems.each(function (dataItem) {
      dataItem.link.setState(stateName);
    });
  }
  if (element.outgoingDataItems) {
    element.outgoingDataItems.each(function (dataItem) {
      dataItem.link.setState(stateName);
    });
  }
  if (element.dataItem.fromNode) {
    element.dataItem.fromNode.setState(stateName);
  }
  if (element.dataItem.toNode) {
    element.dataItem.toNode.setState(stateName);
  }
}

function keepSelected() {
  if (currentNode) {
    currentNode.setState("selected");
    currentNode.incomingDataItems.each(function (dataItem) {
      dataItem.link.setState("related");
    });

    currentNode.outgoingDataItems.each(function (dataItem) {
      dataItem.link.setState("related");
    });
  }
  if (currentLink) {
    currentLink.setState("selected");
    currentLink.dataItem.fromNode.setState("related");
    currentLink.dataItem.toNode.setState("related");
  }
}

function isSelected(target) {
  return currentLink === target || currentNode === target;
}

function isInSelected(target) {
  if (target.incomingDataItems) {
    if (target === currentNode) {
      return true;
    }
    var result = false;
    target.incomingDataItems.each(function (dataItem) {
      result = dataItem.link === currentLink;
    });
    return result;
  }
  if (target.outgoingDataItems) {
    if (target === currentNode) {
      return true;
    }
    var result = false;
    target.outgoingDataItems.each(function (dataItem) {
      result = dataItem.link === currentLink;
    });
    return result;
  }
  if (target.dataItem.fromNode) {
    if (target === currentLink) {
      return true;
    }
  }
  if (target.dataItem.toNode) {
    if (target === currentLink) {
      return true;
    }
  }
}

function clearNodesAndLinksState() {
  chart.nodes.each((k, v) => {
    var node = chart.nodes.getKey(k);
    node.setState("default");
    node.incomingDataItems.each(function (dataItem) {
      dataItem.link.setState("default");
    });
    node.outgoingDataItems.each(function (dataItem) {
      dataItem.link.setState("default");
    });
  });
}
!
999px

Console