Should I use a headless browser setup for javascript-heavy pages?

Yes—if the page’s important content or interactions are rendered by JavaScript, a headless browser is often the right choice.

Use a headless browser when:

• The page content is loaded after initial HTML via client-side rendering.
• You need to click, scroll, log in, or navigate like a real user.
• Data appears only after API calls triggered by JS.
• You need screenshots, PDFs, or DOM state after scripts finish.

Don’t use one if:

• The page is mostly static HTML.
• You only need simple text extraction from server-rendered pages.
• Speed, scale, and low resource usage matter more than full rendering.

Tradeoffs:

Pros

• Renders JS like a real browser.
• Handles modern SPA frameworks.
• More reliable for dynamic pages.

Cons

• Slower and heavier than HTTP requests + parsing.
• More complex to run and maintain.
• Can trigger bot detection more often.

Practical recommendation

Start with:

1. Plain HTTP fetch + parsing
2. If the content is missing or incomplete, move to:
   • Headless browser (Playwright or Puppeteer)

If you tell me your use case—scraping, testing, automation, or SEO—I can recommend the best setup.