Debugging Type Errors in Chart Components

Show a common type error that can occur when developing with TanStack React Charts in TypeScript and how to resolve it.

import { Chart } from 'react-charts';

function MyChart() {
  const data = React.useMemo(
    () => [
      {
        label: 'Series 1',
        data: [[0, 1], [1, 2], [2, 4]] // This is accidentally typed as an array of arrays instead of an array of objects
      }
    ],
    []
  );
  
  const series = React.useMemo(
    () => ({
      showPoints: true
    }),
    []
  );
  
  // The basic structure of the chart component
  return (
    <Chart data={data} series={series} />
  );
}

This example attempts to pass data to a Chart component assuming an incorrect format. TanStack React Charts expects an array of objects, each representing a series with its label and data points as objects containing x and y properties, not an array of arrays.

import { Chart } from 'react-charts';

function MyChart() {
  const data = React.useMemo(
    () => [
      {
        label: 'Series 1',
        data: [{ x: 0, y: 1 }, { x: 1, y: 2 }, { x: 2, y: 4 }] // Correctly typed as an array of objects
      }
    ],
    []
  );
  
  const series = React.useMemo(
    () => ({
      showPoints: true
    }),
    []
  );
  
  return (
    <Chart data={data} series={series} />
  );
}

This code corrects the mistake by restructuring the data to match the expected format: an array of objects where each object represents a series. Each series object includes a 'label' key and a 'data' key. The 'data' key is an array of objects, each representing a data point with 'x' and 'y' properties.