Is console app parameter in react.js code outside serverless.yaml?

I want to print an env variable to console.

I added following veriables in parameters of Serverless app console

in dev: "TESTNAME" : "dev test name"
in prod: "TESTNAME" : "prod test name"

And in js file in my React.js project, I tried


But it returns nothing.

How come it doesn’t work?

Adding additional .env files like