Custom hover / tooltip data on highcharts network chart - highcharts

Question

I am trying to display a custom tooltip on a react highcharts network chart that includes the node id as well as the title and other fields in the JSON data I am feeding it. However I am not able to get this to work using the formatted function specified in the API.
My simplified code is as follows:
import React, { useState, useEffect, useRef } from 'react';
import Highcharts from 'highcharts';
import HighchartsReact from 'highcharts-react-official';
import networkgraph from "highcharts/modules/networkgraph";
networkgraph(Highcharts);
const NetworkChart = () => {
const chartComponent = useRef(null); // reference to chart obj
const [nodeData, setNodeData] = useState([
{ 'id': 'A', title:'ABC', other:'X', dataLabels: { enabled: true }, marker: { radius: 11, fillColor: 'red' } },
{ 'id': 'P', title:'CDE', other:'Y', dataLabels: { enabled: true } },
{ 'id': 'K', title:'EDF', other:'X', dataLabels: { enabled: true } },
{ 'id': 'S', title:'DFG', other:'Z', dataLabels: { enabled: true } },
{ 'id': 'D', title:'SDF', other:'Y', dataLabels: { enabled: true } },
]);
const [linkData, setLinkData] = useState([
{ 'from': 'D', 'to': 'A' },
{ 'from': 'S', 'to': 'A' },
{ 'from': 'K', 'to': 'A' },
{ 'from': 'P', 'to': 'A' }
]);
const [chartOptions, setChartOptions] = useState({
chart: {
type: 'networkgraph',
plotBorderWidth: 1,
},
title: {
text: 'Phrasal verbs'
},
subtitle: {
text: 'Integration: ' + 'euler'
},
credits: false,
plotOptions: {
networkgraph: {
layoutAlgorithm: {
enableSimulation: false,
integration: 'euler',
linkLength: 25,
},
keys: ['from', 'to'],
marker: {
radius: 5,
lineWidth: 1
}
},
series: {
point: {
events: {
click: function () {
// click function
},
}
}
}
},
series: [{
allowPointSelect: true,
nodes: nodeData,
data: linkData,
}]
});
return (
<div>
<HighchartsReact
highcharts={Highcharts}
options={chartOptions}
containerProps={{ style: { height: 700 } }}
allowChartUpdate = {true}
ref={chartComponent}
/>
</div>
)
};
export default NetworkChart;
Currently all I see is node id on hover. What I want to see is node id, title and other field values when I hover on each node in the chart.

Answer 1

You can get the required propeerties through: this.point.options
tooltip: {
formatter: function() {
const { title, other } = this.point.options;
return 'Title: ' + title + ' Other: ' + other
}
}
Live demo: http://jsfiddle.net/BlackLabel/4zgrnqc2/
API Reference: https://api.highcharts.com/highcharts/tooltip.formatter