Podświetl niski i zerowy stan magazynu

(function () {
  var LOW = 5;
  function scan() {
    try {
      var rows = document.querySelectorAll('.Polaris-IndexTable__TableRow, table[class*="Polaris"] tbody tr');
      rows.forEach(function (row) {
        if (row.dataset.jzStock) return;
        var t = (row.textContent || '').toLowerCase();
        var out = /out of stock|0 in stock|unavailable/.test(t);
        var low = false;
        var lm = t.match(/(\d+)\s*in stock/);
        if (lm && parseInt(lm[1], 10) <= LOW) low = true;
        if (out) {
          row.style.boxShadow = 'inset 4px 0 0 #c4341e';
          row.style.background = 'rgba(196,52,30,0.12)';
        } else if (low) {
          row.style.boxShadow = 'inset 4px 0 0 #b98900';
          row.style.background = 'rgba(255,196,0,0.14)';
        }
        row.dataset.jzStock = '1';
      });
    } catch (e) {}
  }
  scan();
  new MutationObserver(scan).observe(document.body, { childList: true, subtree: true });
})();