Icicle from Drilldown in React

import React from 'react'
import ReactApexChart from 'react-apexcharts'
import './styles.css'

import 'apexcharts/icicle'

// An icicle reads the SAME `series` + `drilldown.series` config a drilldown
// chart uses, so an existing drilldown chart becomes an icicle by flipping
// `chart.type`. It reads that config as plain data: the drilldown feature
// itself is never loaded here.
var channelColors = ['#0EA5E9', '#14B8A6', '#F59E0B']
var searchColors = ['#0369A1', '#0284C7', '#38BDF8']
var socialColors = ['#0F766E', '#14B8A6', '#5EEAD4']

const ApexChart = () => {
  const [state, setState] = React.useState({
    series: [
      {
        data: [
          { x: 'Search', y: 790, drilldown: 'search' },
          { x: 'Social', y: 360, drilldown: 'social' },
          { x: 'Direct', y: 240 },
        ],
      },
    ],
    options: {
      chart: {
        type: 'icicle',
        height: 380,
      },
      colors: channelColors,
      // A legend is off by default (every cell is labelled already), but this tree
      // has several roots, so the palette lines up with it exactly.
      legend: {
        show: true,
        position: 'bottom',
      },
      title: {
        text: 'Signups by acquisition channel',
        align: 'left',
      },
      subtitle: {
        text: 'The same series + drilldown.series config as a drilldown chart, shown whole.',
        align: 'left',
      },
      plotOptions: {
        icicle: {
          direction: 'right',
          borderRadius: 2,
        },
      },
      stroke: {
        width: 1,
        colors: ['#fff'],
      },
      drilldown: {
        series: [
          {
            id: 'search',
            name: 'Search',
            colors: searchColors,
            data: [
              { x: 'Organic', y: 420 },
              { x: 'Paid', y: 260 },
              { x: 'Brand', y: 110 },
            ],
          },
          {
            id: 'social',
            name: 'Social',
            colors: socialColors,
            data: [
              { x: 'Video', y: 180 },
              { x: 'Posts', y: 120 },
              { x: 'Communities', y: 60 },
            ],
          },
        ],
      },
    },
  })

  return (
    <div>
      <div id="chart">
        <ReactApexChart
          options={state.options}
          series={state.series}
          type="icicle"
          height={380}
        />
      </div>
    </div>
  )
}

export default ApexChart