docs: clarify environment variables behavior #36620
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styfle
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May 2, 2022
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| > **Note**: In order to keep server-only secrets safe, Next.js replaces `process.env.*` with the correct values | ||
| > at build time. This means that `process.env` is not a standard JavaScript object, so you’re not able to | ||
| > **Note**: In order to keep server-only secrets safe, environment variables are evaluated at build time, so only environment variables *actually* used will be included. This means that `process.env` is not a standard JavaScript object, so you’re not able to |
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This is less clear because "evaluated" is not the same as "replaced".
Typically eval allows dynamic usage but this is pure static analysis. The syntax is very specific.
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You are right. Any suggestion on how we can make it more clear? 🤔
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I think this entire page needs to be reworked but we can ship this for now
styfle
previously approved these changes
May 3, 2022
ijjk
approved these changes
May 22, 2022
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Based on #36551 (comment) making the docs more clear which also aligns with the wording of Environment Variables in Middlerware: https://nextjs.org/docs/api-reference/next/server#how-do-i-access-environment-variables
See also: #20869 (comment)
Bug
fixes #numbercontributing.mdFeature
fixes #numbercontributing.mdDocumentation / Examples
yarn lint