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docs(config): clarify .npmrc naming convention for environment variable overrides #8752

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docs(config): clarify .npmrc naming convention for environment variable overrides #8752

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2 changes: 2 additions & 0 deletions docs/lib/content/using-npm/config.md
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Expand Up @@ -31,6 +31,8 @@ For details see [this issue](https://github.com/npm/npm/issues/14528).

Notice that you need to use underscores instead of dashes, so `--allow-same-version` would become `npm_config_allow_same_version=true`.

**Important:** When defining custom configuration keys in `.npmrc` files, use hyphens instead of underscores (e.g., `custom-key=value`). This ensures they can be overridden by environment variables, since npm automatically converts underscores to hyphens when reading environment variables. Keys with underscores in `.npmrc` files cannot be overridden via environment variables.

#### npmrc Files

The four relevant files are:
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