@mui/x-data-grid-pro/esm/hooks/features/lazyLoader/utils.js

The Pro plan edition of the MUI X Data Grid components.

import { gridRowNodeSelector } from '@mui/x-data-grid';
export const findSkeletonRowsSection = ({
  apiRef,
  visibleRows,
  range
}) => {
  let {
    firstRowIndex,
    lastRowIndex
  } = range;
  const visibleRowsSection = visibleRows.slice(range.firstRowIndex, range.lastRowIndex);
  let startIndex = 0;
  let endIndex = visibleRowsSection.length - 1;
  let isSkeletonSectionFound = false;
  while (!isSkeletonSectionFound && firstRowIndex < lastRowIndex) {
    const isStartingWithASkeletonRow = gridRowNodeSelector(apiRef, visibleRowsSection[startIndex].id)?.type === 'skeletonRow';
    const isEndingWithASkeletonRow = gridRowNodeSelector(apiRef, visibleRowsSection[endIndex].id)?.type === 'skeletonRow';
    if (isStartingWithASkeletonRow && isEndingWithASkeletonRow) {
      isSkeletonSectionFound = true;
    }
    if (!isStartingWithASkeletonRow) {
      startIndex += 1;
      firstRowIndex += 1;
    }
    if (!isEndingWithASkeletonRow) {
      endIndex -= 1;
      lastRowIndex -= 1;
    }
  }
  return isSkeletonSectionFound ? {
    firstRowIndex,
    lastRowIndex
  } : undefined;
};