Function buildNullData

handsontable/src/dataMap/replaceData.ts:33–62

* Builds the initial empty dataset rows when `data` is `null`. * * @param {HotInstance} hotInstance The Handsontable instance. * @param {DataMap} newDataMap The newly created DataMap instance. * @param {object} tableMeta The current table settings. * @returns {unknown[]} The generated data arra

(
  hotInstance: HotInstance,
  newDataMap: DataMap,
  tableMeta: ReturnType<HotInstance['getSettings']>
)

 * @returns {unknown[]} The generated data array.
 */
function buildNullData(
  hotInstance: HotInstance,
  newDataMap: DataMap,
  tableMeta: ReturnType<HotInstance['getSettings']>
): unknown[] {
  const dataSchema = newDataMap.getSchema();
  const data: unknown[] = [];

  for (let r = 0, rlen = tableMeta.startRows as number; r < rlen; r++) {
    let row;

    if ((hotInstance.dataType === 'object' || hotInstance.dataType === 'function') && tableMeta.dataSchema) {
      row = deepClone(dataSchema);

    } else if (hotInstance.dataType === 'array') {
      row = deepClone((dataSchema as unknown[])[0]);

    } else {
      row = [];

      for (let c = 0, clen = tableMeta.startCols as number; c < clen; c++) {
        row.push(null);
      }
    }

    data.push(row);
  }

  return data;
}

/**
 * Loads new data to Handsontable.