@mui/x-charts/esm/LineChart/seriesConfig/tooltipPosition.js

The community edition of MUI X Charts components.

const tooltipItemPositionGetter = params => {
  const {
    series,
    identifier,
    axesConfig
  } = params;
  if (!identifier || identifier.dataIndex === undefined) {
    return null;
  }
  const itemSeries = series.line?.series[identifier.seriesId];
  if (itemSeries == null) {
    return null;
  }
  if (axesConfig.x === undefined || axesConfig.y === undefined) {
    return null;
  }
  const xValue = axesConfig.x.data?.[identifier.dataIndex];
  const yValue = itemSeries.data[identifier.dataIndex] == null ? null : itemSeries.visibleStackedData[identifier.dataIndex][1];
  if (xValue == null || yValue == null) {
    return null;
  }
  return {
    x: axesConfig.x.scale(xValue),
    y: axesConfig.y.scale(yValue)
  };
};
export default tooltipItemPositionGetter;