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7/14/2026
Understanding the credentials Option in the Fetch API

Understanding the credentials Option in the Fetch API

Short summary

A straightforward tutorial covering the three credential modes of the Fetch API: omit (never send credentials), same-origin (default, send only for same-origin), and include (allow eligible cookies in cross-origin requests). Explains how each mode interacts with cookies and CORS headers. Not AI-related; purely a web development reference.

  • •Three credential modes: omit, same-origin (default), and include
  • •include allows cross-origin cookies but requires Access-Control-Allow-Credentials: true
  • •Not AI-related; standard web development content

Generated with AI, which can make mistakes.

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