npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@browserify/envify

v6.0.0

Published

Selectively replace Node-style environment variables with plain strings.

Downloads

12,199

Readme

@browserify/envify Build status stable

Selectively replace Node-style environment variables with plain strings. Available as a standalone CLI tool and a Browserify transform.

Works best in combination with @browserify/uglifyify.

Installation

If you're using the module with Browserify:

npm install @browserify/envify browserify

Or, for the CLI:

sudo npm install -g @browserify/envify

Usage

envify will replace your environment variable checks with ordinary strings - only the variables you use will be included, so you don't have to worry about, say, AWS_SECRET_KEY leaking through either. Take this example script:

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

After running it through envify with NODE_ENV set to production, you'll get this:

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

By running this through a good minifier (e.g. terser), the above code would be stripped out completely.

However, if you bundled the same script with NODE_ENV set to development:

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

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

CLI Usage

With browserify:

browserify index.js -t @browserify/envify > bundle.js

Or standalone:

envify index.js > bundle.js

You can also specify additional custom environment variables using browserify's subarg syntax, which is available in versions 3.25.0 and above:

browserify index.js -t [ @browserify/envify --NODE_ENV development ] > bundle.js
browserify index.js -t [ @browserify/envify --NODE_ENV production  ] > bundle.js

Module Usage

require('@browserify/envify')

Returns a transform stream that updates based on the Node process' process.env object.

require('@browserify/envify/custom')([environment])

If you want to stay away from your environment variables, you can supply your own object to use in its place:

var browserify = require('browserify')
  , envify = require('@browserify/envify/custom')
  , fs = require('fs')

var b = browserify('main.js')
  , output = fs.createWriteStream('bundle.js')

b.transform(envify({
  NODE_ENV: 'development'
}))
b.bundle().pipe(output)

Purging process.env

By default, environment variables that are not defined will be left untouched. This is because in some cases, you might want to run an envify transform over your source more than once, and removing these values would make that impossible.

However, if any references to process.env are remaining after transforming your source with envify, browserify will automatically insert its shim for Node's process object, which will increase the size of your bundle. This weighs in at around 2KB, so if you're trying to be conservative with your bundle size you can "purge" these remaining variables such that any missing ones are simply replaced with undefined.

To do so through the command-line, simply use the subarg syntax and include purge after envify, e.g.:

browserify index.js -t [ @browserify/envify purge --NODE_ENV development ]

Or if you're using the module API, you can pass _: "purge" into your arguments like so:

b.transform(envify({
    _: 'purge'
  , NODE_ENV: 'development'
}))

Contributors