LOOSE-ENVIFY(1) loose-envify man page LOOSE-ENVIFY(1)
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 mate-
rial from the envify README (https://github.com/hughsk/envify) by Hugh
Kennedy <hughskennedy@gmail.com> and the envify contributors.
v1.3.0 November 2022 LOOSE-ENVIFY(1)
Generated by dwww version 1.15 on Wed Sep 3 22:50:11 CEST 2025.