nivo/examples/codesandbox/src/charts/Choropleth.tsx

import { ResponsiveChoropleth, ResponsiveChoroplethCanvas } from '@nivo/geo'
import { countries } from '../data'
import { useChart } from '../hooks'

const props = {
  borderWidth: 0.5,
  colors: 'nivo',
  domain: [0, 1000000],
  features: countries.features,
}

const generateData = () =>
  countries.features
    .filter(
      (feature) => !['BRA', 'AUS', 'SWE', 'GRL', 'COD'].includes(feature.id)
    )
    .map((feature) => ({
      id: feature.id,
      value: Math.round(Math.random() * 1000000),
    }))

export function Choropleth() {
  const [data, flavor] = useChart(generateData)

  if (flavor === 'canvas') {
    return <ResponsiveChoroplethCanvas data={data} {...props} />
  }

  return <ResponsiveChoropleth data={data} {...props} />
}