example-common-types.ts

export interface DataPoint {
  key: number | string;
  value: number | null;
}

export interface DataSeries {
  data: DataPoint[];
  color?: Color;
  isComparison?: boolean;
  name: string;
}

export enum ChartState {
  Loading = 'Loading',
  Error = 'Error',
  Success = 'Success',
}

export interface ChartProps {
  data: DataSeries[];
  theme?: string;
  isAnimated?: boolean;
  state?: ChartState;
}

export type WithRequired<T, K extends keyof T> = T & {[P in K]-?: T[P]};

// ...