The Headless Browser Trap If you want to scrape a modern React or Vue website, the “standard” advice is to use a headless browser like Selenium or Playwright. These tools boot up a literal browser, wait for JavaScript to execute, and then let you parse the HTML.

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Modern JavaScript-heavy websites (React, Vue) typically load data via internal JSON APIs rather than rendering it server-side. Instead of using slow, resource-heavy headless browsers like Selenium or Playwright, you can intercept these internal API calls using the browser's Network tab, filter by Fetch/XHR requests, and replicate them directly in code. The workflow involves using 'Copy as cURL' from DevTools, converting it to Ruby code via curlconverter.com, and making direct HTTP requests with the Faraday or HTTP gem. This approach is 100x faster (100–300ms vs. 5+ seconds), returns more stable structured JSON data, and often exposes additional fields not visible in the UI. Common obstacles include CSRF tokens, rate limiting, and GraphQL endpoints, each with practical workarounds.

The Faster Way to Scrape: Finding ‘Hidden’ APIs in Modern Websites

Step 1: The Detective Work (The Network Tab)