Is it possible to point environmental variables from JavaScript(e.g react, vue, angular) during build time to JBOSS System-Properties and can be access during runtime?

Heres my sample code:

const RESOURCE = process.env.NODE_ENV === 'production' ? (how???) : process.env.DEV_RESOURCE

function exampleMethod(token) { return { url: ${RESOURCE }/login, method: 'POST', } }

export { exampleMethod}

Here is the screen shot of environmental variables in jboss.