const sleep = ms => new Promise(r=>setTimeout(r,ms));
const getSel = () => { for (const el of document.querySelectorAll('[data-id^="selectOptionKey_"]')) {
  const fs = el.closest('fieldset');
  if (el.offsetParent!==null && fs && (fs.querySelector('legend')||{}).textContent==='忽略网络') return el; } return null; };
const sel = getSel(); if(!sel) return {err:'no select'};
const fk = Object.keys(sel).find(k=>k.startsWith('__reactFiber$'));
let f=sel[fk], target=null;
for(let i=0;i<12&&f;i++){ const mp=f.memoizedProps;
  if(mp && mp.list && typeof mp.onChange==='function'){ target=mp; break; } f=f.return; }
if(!target) return {err:'no onChange fiber'};
const L = target.list;
return {listLen: L.length, sample: L.slice(0,5), value: target.value};