interaction/component/legend

Example page

import { Chart } from '@antv/g2';

const chart = new Chart({
  container: 'container',
  autoFit: true,
});

chart.options({
  type: 'interval',
  data: [
    { month: 'Jan.', profit: 387264, start: 0, end: 387264 },
    { month: 'Feb.', profit: 772096, start: 387264, end: 1159360 },
    { month: 'Mar.', profit: 638075, start: 1159360, end: 1797435 },
    { month: 'Apr.', profit: -211386, start: 1797435, end: 1586049 },
    { month: 'May', profit: -138135, start: 1586049, end: 1447914 },
    { month: 'Jun', profit: -267238, start: 1447914, end: 1180676 },
    { month: 'Jul.', profit: 431406, start: 1180676, end: 1612082 },
    { month: 'Aug.', profit: 363018, start: 1612082, end: 1975100 },
    { month: 'Sep.', profit: -224638, start: 1975100, end: 1750462 },
    { month: 'Oct.', profit: -299867, start: 1750462, end: 1450595 },
    { month: 'Nov.', profit: 607365, start: 1450595, end: 2057960 },
    { month: 'Dec.', profit: 1106986, start: 2057960, end: 3164946 },
    { month: 'Total', start: 0, end: 3164946 },
  ],
  encode: {
    x: 'month',
    y: ['end', 'start'],
    color: (d) =>
      d.month === 'Total' ? 'Total' : d.profit > 0 ? 'Increase' : 'Decrease',
  },
  axis: { y: { labelFormatter: '~s' } },
  interaction: { legendFilter: true },
});

chart.render();