简单饼图

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

const data = [
  { item: '事例一', count: 40, percent: 0.4 },
  { item: '事例二', count: 21, percent: 0.21 },
  { item: '事例三', count: 17, percent: 0.17 },
  { item: '事例四', count: 13, percent: 0.13 },
  { item: '事例五', count: 9, percent: 0.09 },
];

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

chart.options({
  type: 'interval',
  coordinate: { type: 'theta', outerRadius: 0.8 },
  data: data,
  transform: [{ type: 'stackY' }],
  encode: { y: 'percent', color: 'item' },
  legend: {
    color: { position: 'bottom', layout: { justifyContent: 'center' } },
  },
  labels: [
    {
      position: 'outside',
      text: (data) => `${data.item}: ${data.percent * 100}%`,
    },
  ],
  tooltip: {
    items: [
      (data) => ({
        name: data.item,
        value: `${data.percent * 100}%`,
      }),
    ],
  },
});

chart.render();