Environment variable toolkit — Infisical integration, local overrides, and client-side runtime injection for Next.js / Vite / Express.
A Babel preset for each environment.
Offers getProxyForUrl to get the proxy URL for a URL, respecting the *_PROXY (e.g. HTTP_PROXY) and NO_PROXY environment variables.
AWS credential provider that sources credentials from known environment variables
Runtime agnostic JS utils
Run scripts that set and use environment variables across platforms
Loads environment variables from .env file
Convert modern CSS into something browsers understand
Next.js dotenv file loading
A global executable to run applications with the ENV variables loaded by dotenv
Get the PATH environment variable key cross-platform
Drop-in JSX runtime that adds data-morphix-loc to every rendered element in dev mode. Set tsconfig.jsxImportSource = '@harnessa-fe/react-jsx' and the Harnessa-FE agent can map any DOM node back to file:line:col with zero bundler config.
hydrate environment variables from .env files into process.env
Executes a command using the environment variables in an env file
HANDLE CONFIGURATION ONCE AND FOR ALL
Uses export conditions to return environment information in a way that works with major bundlers and runtimes.
Get paths for storing things like data, config, cache, etc
A Babel preset that targets modern browsers by fixing engine bugs.
Regular expression for matching a shebang line
Use env() variables in CSS
 [](https://jsr.io/@t3-oss/env-core) [](https://jsr.io/@t3-oss/env-core) [![Socket Bad
Robust Environment Configuration for Universal Applications.
A babel plugin that adds istanbul instrumentation to ES6 code
TypeScript definitions for webpack-env