cloudflare/workers-sdk miniflare@4.20260210.0

on GitHub

Minor Changes

• #12469 2d90127 Thanks @petebacondarwin! - Add environment variables to control cf.json fetching behavior

  You can now use environment variables to control how Miniflare handles the Request.cf object caching:

  • CLOUDFLARE_CF_FETCH_ENABLED - Set to "false" to disable fetching entirely and use fallback data. No node_modules/.mf/cf.json file will be created. Defaults to "true".
  • CLOUDFLARE_CF_FETCH_PATH - Set to a custom path to use a different location for caching the cf.json file instead of the default node_modules/.mf/cf.json.

  This is particularly useful for non-JavaScript projects (like Rust or Go Workers) that don't want a node_modules directory created automatically.

  Example:

  # Disable cf fetching for all projects
  export CLOUDFLARE_CF_FETCH_ENABLED=false
  npx wrangler dev
  
  # Or use a custom cache location
  export CLOUDFLARE_CF_FETCH_PATH=/tmp/.cf-cache.json
  npx wrangler dev

• #12391 ce9dc01 Thanks @emily-shen! - Serve the local explorer UI from Miniflare

  This bundles the local explorer UI into Miniflare, and if enabled, Miniflare serves the UI at /cdn-cgi/explorer.

  This is an experimental, WIP feature.

Patch Changes

• #12440 555b32a Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260205.0	1.20260206.0

• #12485 d636d6a Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260206.0	1.20260207.0

• #12502 bf8df0c Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260207.0	1.20260210.0