Since your previously working scraper for extracting references from those hidden elements is now failing, here are targeted fixes and debugging steps to get you back on track:

• Check for DOM Structure Shifts: Websites often tweak their HTML behind the scenes, especially for hidden elements. Fire up your browser's dev tools (F12) to inspect the target page—verify if the hidden elements' IDs, classes, or name attributes have changed, or if they're now wrapped in new parent containers that break your selector logic.
• Validate Dynamic Loading Logic: If the page uses JavaScript to populate hidden elements, the loading mechanism might have shifted. Use the Network tab in dev tools to check if the data is now pulled from a different API endpoint, or if the timing of element rendering has changed. You may need to adjust your scraper's wait time or switch to a headless browser that can fully execute JS.
• Rule Out Anti-Scraping Measures: Archival sites like this often add rate limiting or bot detection over time. If you're making too many requests too quickly, the site might block or alter the content sent to you. Try adding delays between requests, using rotating user-agent strings, or checking if valid cookies/session tokens are now required to access the hidden data.
• Double-Check Selector Syntax: A tiny typo or changed hierarchy can break your extraction. Test your CSS selectors or XPath queries directly in the browser's console to confirm they still target the correct elements.
• Compare Raw vs. Browser-Rendered HTML: If you're using an HTTP client to fetch the page source, compare the raw response with what you see in the browser. Sometimes servers send stripped-down content to non-browser clients—you might need to mimic browser headers more closely (like Accept, Referer, or Cookie).

Pro tip: If you can pinpoint the exact failure (e.g., elements not found, empty content, 403 errors), you can narrow down the fix even faster.

内容的提问来源于stack exchange，提问作者Phantom139