declare global {
  interface Number {
    add: (num: number | string, fixed?: number) => number;
    sub: (num: number | string, fixed?: number) => number;
    mul: (num: number | string, fixed?: number) => number;
    div: (num: number | string, fixed?: number) => number;
    mod: (num: number | string, fixed?: number) => number;
    _toFixed: (fixed?: number) => number;
    _toPrecision: (fixed?: number) => number;
    _toThousands: (fixed?: number) => number;
    _toFormatWithUnit: () => number;
  }
}
// 规定图表的一些配置
export default {
  height: 400,
  // 统一轴的格式
  yAxis: {
    label: { formatter: (v: number | string) => Number(v)._toFormatWithUnit() },
    min: 0
  },
  xAxis: {
    type: 'timeCat',
    nice: true
  },
  // 统一图例的显示位置
  legend: { position: 'bottom' } as any,
  autoFit: true,
}