cloudflare/workers-sdk wrangler@4.27.0

on GitHub

Minor Changes

• #9914 a24c9d8 Thanks @petebacondarwin! - Add support for loading local dev vars from .env files

  If there are no .dev.vars or .dev.vars.<environment> files, when running Wrangler or the Vite plugin in local development mode,
  they will now try to load additional local dev vars from .env, .env.local, .env.<environment> and .env.<environment>.local files.

  These loaded vars are only for local development and have no effect in production to the vars in a deployed Worker.
  Wrangler and Vite will continue to load .env files in order to configure themselves as a tool.

  Further details:

  • In vite build the local vars will be computed and stored in a .dev.vars file next to the compiled Worker code, so that vite preview can use them.
  • The wrangler types command will similarly read the .env files (if no .dev.vars files) in order to generate the Env interface.
  • If the CLOUDFLARE_LOAD_DEV_VARS_FROM_DOT_ENV environment variable is "false" then local dev variables will not be loaded from .env files.
  • If the CLOUDFLARE_INCLUDE_PROCESS_ENV environment variable is "true" then all the environment variables found on process.env will be included as local dev vars.
  • Wrangler (but not Vite plugin) also now supports the --env-file=<path/to/dotenv/file> global CLI option. This affects both loading .env to configure Wrangler the tool as well as loading local dev vars.

Patch Changes

• #10051 0f7820e Thanks @nikitassharma! - Add support for custom instance limits for containers. For example, instead of
  having to use the preconfigured dev/standard/basic instance types, you can now
  set:

  instance_type: {
    vcpu: 1,
    memory_mib: 1024,
    disk_mb: 4000
  }
  

  This feature is currently only available to customers on an enterprise plan.

• #10149 e9bb8d3 Thanks @vicb! - fix require("debug") in nodejs_compat mode

• Updated dependencies [9b61f44]:

  • miniflare@4.20250730.0