// config-overrides.js
const rewireIdx = require('react-app-rewire-idx');

module.exports = function override(config, env) {
  config = rewireIdx(config, env);
  // other rewires...
  return config;
}

// config-overrides.js
const { compose } = require('react-app-rewired')
const rewireIdx = require('react-app-rewire-idx');

module.exports = compose(
  rewireIdx,
  // other rewires...
);