Bot's-eye view
Same HTML, two readers: a browser that runs JavaScript and a crawler that only reads the HTML it downloads.
Your browser can't render iframe srcdoc, so the browser pane is unavailable; the crawler pane still works.
0words in the browser
0words a no-JS bot reads
Browserruns JS
GPTBot · ClaudeBot · PerplexityBotno JS
- <title>
- description
- <h1>
- JSON-LD
- links
Edit the HTML (or paste your page's view-source)
The crawler pane parses the HTML with DOMParser, which never runs scripts. Bot behaviour per Vercel's crawler study (Dec 2024).