Cnki Journal Search

async () => {  const query = "QUERY_HERE";
  // Wait for page load  await new Promise((r, j) => {    let n = 0;    const c = () => { if (document.querySelector('input.researchbtn')) r(); else if (++n > 30) j('timeout'); else setTimeout(c, 500); };    c();  });
  // Check captcha (visible on screen, not hidden SDK at top:-1000000)  const outer = document.querySelector('#tcaptcha_transform_dy');  if (outer && outer.getBoundingClientRect().top >= 0) return { error: 'captcha' };
  // Auto-detect search type and fill  const select = document.querySelector('select');  if (select) {    if (/^\d{4}-\d{3}[\dXx]$/.test(query)) select.value = 'ISSN';    else if (/^\d{2}-\d{4}/.test(query)) select.value = 'CN';    select.dispatchEvent(new Event('change', { bubbles: true }));  }
  const input = document.querySelector('input[placeholder*="检索词"]');  if (input) input.value = query;
  // Click search button (verified selector: input.researchbtn)  document.querySelector('input.researchbtn')?.click();
  // Wait for results  await new Promise((r, j) => {    let n = 0;    const c = () => { if (document.body.innerText.includes('条结果')) r(); else if (++n > 30) j('timeout'); else setTimeout(c, 500); };    c();  });
  // Click 期刊 tab to filter journals only  const tabs = document.querySelectorAll('li a');  for (const a of tabs) { if (a.innerText.trim() === '期刊') { a.click(); break; } }  await new Promise(r => setTimeout(r, 1500));
  // Extract journal results  const body = document.body.innerText;  const countMatch = body.match(/共\s*(\d+)\s*条结果/) || body.match(/找到\s*(\d+)\s*条结果/);  const count = countMatch ? parseInt(countMatch[1]) : 0;
  const results = [];  const titleLinks = document.querySelectorAll('a[href*="knavi/detail"]');  titleLinks.forEach(link => {    const text = link.innerText?.trim();    if (!text || text.length < 2) return;    const parent = link.closest('li, .list-item') || link.parentElement?.parentElement;    const pt = parent?.innerText || '';    results.push({      name: text.split('\n')[0]?.trim(),      url: link.href,      issn: pt.match(/ISSN[：:]\s*(\S+)/)?.[1] || '',      cn: pt.match(/CN[：:]\s*(\S+)/)?.[1] || '',      cif: pt.match(/复合影响因子[：:]\s*([\d.]+)/)?.[1] || '',      aif: pt.match(/综合影响因子[：:]\s*([\d.]+)/)?.[1] || '',      citations: pt.match(/被引次数[：:]\s*([\d,]+)/)?.[1] || '',      downloads: pt.match(/下载次数[：:]\s*([\d,]+)/)?.[1] || '',      sponsor: pt.match(/主办单位[：:]\s*(.+?)(?=\n|ISSN)/)?.[1]?.trim() || ''    });  });
  return { query, count, results };}