Using environment variables in React applications

In React applications (e.g. those using @nrwl/web:webpack or @nrwl/next:build executors for build target), Nx includes the following variables in the build process:

  • Variables prefixed with NX_, such as NX_CUSTOM_VAR

Defining environment variables can vary between OSes. It's also important to know that this is temporary for the life of the shell session.

Using environment variables in index.html

Nx supports interpolating environment variables into your index.html file for React and Web applications.

To interpolate an environment variable named NX_DOMAIN_NAME into your index.html, surround it with % symbols like so:

2  <body>
3    <p>The domain name is %NX_DOMAIN_NAME%.</p>
4  </body>