Pemeriksa limpahan mudah alih

(() => {
  const width = document.documentElement.clientWidth || innerWidth;
  const MAX_SCAN = 8000;
  const MAX_RESULTS = 80;
  const candidates = [];
  const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_ELEMENT);
  let scanCapped = false;
  while (walker.nextNode()) {
    if (candidates.length === MAX_SCAN) {
      scanCapped = true;
      break;
    }
    candidates.push(walker.currentNode);
  }
  const overflowRows = candidates.map((el) => {
    const rect = el.getBoundingClientRect();
    const style = getComputedStyle(el);
    return { element: el, selector: el.tagName.toLowerCase() + (el.id ? '#' + CSS.escape(el.id) : '') + [...el.classList].slice(0, 2).map((name) => '.' + CSS.escape(name)).join(''), left: Math.round(rect.left), right: Math.round(rect.right), width: Math.round(rect.width), position: style.position, overflow: rect.left < -2 || rect.right > width + 2 };
  }).filter((row) => row.overflow && row.width > 0).sort((a, b) => Math.max(b.right - width, -b.left) - Math.max(a.right - width, -a.left));
  const rows = overflowRows.slice(0, MAX_RESULTS);
  console.table(rows.map(({ element, ...row }) => row));
  console.info('Viewport width:', width, '· document width:', document.documentElement.scrollWidth, '· out-of-viewport elements:', overflowRows.length, '· shown:', rows.length, '· scanned elements:', candidates.length);
  if (overflowRows.length > MAX_RESULTS) console.warn('Showing the ' + MAX_RESULTS + ' largest candidates out of ' + overflowRows.length + ' overflowing elements.');
  if (scanCapped) console.warn('Scan stopped at ' + MAX_SCAN + ' elements; additional elements were not checked.');
  if (document.documentElement.scrollWidth > width) console.warn('The document is wider than the current viewport. Run again at the target mobile width.');
  console.info('This reports geometry only; fixed headers, intentional carousels, transforms, and browser zoom may produce false positives.');
})();

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