Global vars

Hello, I'm trying to find the most convenient approach to pass keys into internal clients and other env values previously provided via process.env.NAME. I stumbled across this mention in docs: https://developers.cloudflare.com/workers/wrangler/environments/#:~:text=Any%20defined%20environment%20variables%20(the%20vars%20key)%20are%20exposed%20as%20global%20variables%20to%20your%20Worker. Does it work? Variables specified in wrangler.toml are accessible via env.NAME param but they don't seem globally accessible as the snippet in the docs.
Environments · Cloudflare Workers docs
Deploy the same Worker application with different configuration for each environment.
4 Replies
kian
kian6mo ago
They were global on legacy Service Workers Module Workers only have them on env
Dan
Dan6mo ago
Thanks for the clarification!
kian
kian6mo ago
You could use https://developers.cloudflare.com/workers/runtime-apis/nodejs/ to expose a process that you can import & set values on (https://developers.cloudflare.com/workers/runtime-apis/nodejs/process/) or use the Wrangler define option to do build-time constants, depending on if these values are secrets or not.
Dan
Dan6mo ago
Does it impact worker's performance when I opt-in to node compatibility? I see that the process needs to be imported and env values copied. How is it different from creating a module with custom export const env = {}; ?
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