Project Structure

├── project
│   └── operation
│       ├── index.minus.js
│       └── index.plus.js
│   └── index.js

project/operation/index.minus.js

export default (a, b) => (a - b);

project/operation/index.plus.js

export default (a, b) => (a + b);

project/index.js

import operation from './operation';

const result = operation(2, 3);

console.log(result);

Requirement

My requirement is to set an environment variable like OPERATION_NAME and based on its value (minus | plus) we have to import that particular index.${OPERATION_NAME}.js into the project/index.js file.

How to implement this functionality using babel or any other mechanisms?