What causes CORS policy preflight failures specifically on Safari when credentials are included in fetch requests from a React SPA?
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Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
What causes CORS policy preflight failures specifically on Safari when credentials are included in fetch requests from a React SPA?
1 real search · 1 real-search pass
Safari CORS preflight credentials include OPTIONS request credentials Fetch standard WebKit Intelligent Tracking Prevention third-party cookies CORS redirectsGoogle ↗
OBSERVED
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
Classifying 1 queries…
Searches and sources
ChatGPT1 real searches · gpt-6
Safari CORS preflight credentials include OPTIONS request credentials Fetch standard WebKit Intelligent Tracking Prevention third-party cookies CORS redirects Google ↗
- https\://app.example.com · app.example.com
- https\://api.example.com · api.example.com