Package description
The exenv npm package is a utility library for managing environment-specific code in JavaScript applications. It allows developers to write conditional code based on the current execution environment, such as development, test, or production. This can be particularly useful for configuring application behavior without exposing sensitive environment details or for optimizing the application by excluding unnecessary code in production.
Environment Checking
This feature allows developers to check if the DOM is available in the current environment. It's useful for avoiding errors in non-browser environments like server-side rendering.
if (exenv.canUseDOM) {
console.log('This code runs only if DOM is available');
}Development vs Production Code
This feature enables conditional execution of code based on whether the environment is set to 'production' or not. It helps in implementing environment-specific logic such as logging and debugging.
if (exenv.env === 'production') {
console.log('Running in production mode');
} else {
console.log('Not running in production mode');
}Envify is a package that replaces environment variables in your code during the build step with Browserify. It is similar to exenv in that it helps manage environment-specific code, but it does so by compiling time replacements rather than runtime checks.
Dotenv is a module that loads environment variables from a .env file into process.env. While it serves a different purpose from exenv by managing environment variables, it similarly aids in configuring different behaviors based on the environment.
Readme
React's ExecutionEnvironment module extracted for use in other packages & components.
Because a lot of packages and components use React's private ExecutionEnvironment lib to detect the environment, e.g
canUseDOM = require('react/lib/ExecutionEnvironment').canUseDOM;
It is bad practice to use React internals and this is likely to be broken / disabled in the future. Use this package instead.
npm install exenv --save
var ExecutionEnvironment = require('exenv');
// You now have...
ExecutionEnvironment.canUseDOM // is the DOM available? i.e window document etc.
ExecutionEnvironment.canUseWorkers // are Web Workers available?
ExecutionEnvironment.canUseEventListeners // are Events available? i.e addEventListener etc.
ExecutionEnvironment.canUseViewport // is there a viewport? i.e window.screen
FAQs
React's ExecutionEnvironment module extracted for use in other packages & components
We found that exenv demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Application Security
New SEC disclosure rules aim to enforce timely cyber incident reporting, but fear of job loss and inadequate resources lead to significant underreporting.
Security News
The Python Software Foundation has secured a 5-year sponsorship from Fastly that supports PSF's activities and events, most notably the security and reliability of the Python Package Index (PyPI).
Security News
LDAPjs, an LDAP Client and Server API for Node.js, was decommissioned after its maintainer received an abusive email from a user, raising concerns about this form of abuse as a potential attack vector.