@mui/x-charts/LineChart/getColor.js

The community edition of the Charts components (MUI X).

const getColor = (series, xAxis, yAxis) => {
  const yColorScale = yAxis?.colorScale;
  const xColorScale = xAxis?.colorScale;
  if (yColorScale) {
    return dataIndex => {
      const value = series.data[dataIndex];
      const color = value === null ? series.color : yColorScale(value);
      if (color === null) {
        return series.color;
      }
      return color;
    };
  }
  if (xColorScale) {
    return dataIndex => {
      const value = xAxis.data?.[dataIndex];
      const color = value === null ? series.color : xColorScale(value);
      if (color === null) {
        return series.color;
      }
      return color;
    };
  }
  return () => series.color;
};
export default getColor;