---
name: "loose-envify"
section: "1"
platform: "linux"
package: "node-loose-envify"
version: "1.4.0+dfsg1-4"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/loose-envify"
---

# loose-envify(1)

replace Node.js environment variables with plain strings

## NAME

**loose-envify** - replace Node.js environment variables with plain strings

## SYNOPSIS

loose-envify \<javascript\_source\_file.js\>

## DESCRIPTION

Performs a Javascript source-to-source transformation (transpiling), that efficiently replaces Node.js process.env environment variables with plain strings. This makes the environment variable checks faster and easier to optimize out.

## EXAMPLES

Running this source code:

```
if (process.env.NODE_ENV === "development") {
  console.log('development only')
}
```

through loose-envify:

```
loose-envify index.js > bundle.js
```

with NODE\_ENV set to production results in:

```
if ("production" === "development") {
  console.log('development only')
}
```

which, when run through a minifier, would be stripped out completely.

However, if you run the same script through loose-envify with NODE\_ENV set to development it gives:

```
if ("development" === "development") {
  console.log('development only')
}
```

The if statement will evaluate to true, so the code won't be removed.

## AUTHOR

Andres Suarez **\<zertosh@gmail.com\>**

## COPYRIGHT

This manual page was written by Paolo Greppi **\<paolo.greppi@libpf.com\>** for the Debian project (and may be used by others), also based on material from the envify README (https://github.com/hughsk/envify) by Hugh Kennedy **\<hughskennedy@gmail.com\>** and the envify contributors.