if you are asking about environment variables, it is recommended that each system add environment variables with the same name, such as ENV=test. Js can be compiled with environment parameters, such as

project_path=$(cd `dirname $0`; pwd)

export NODE_ENV=$ENV

./node_modules/.bin/webpack --config webpack.dll.config -p
./node_modules/.bin/webpack --config webpack.config -p

here you can export environment variables directly to the js compilation environment.
then you can judge happily in the program

module.exports = {
    API_URL:process.env.NODE_ENV == "production" ? "http://XXXX/api/":"http://AAAA/api/",
    IMAGE_URL:process.env.NODE_ENV == "production" ?  "http://XXXXX": "http://AAAA"
}