webpack.config.js

// If you want to use an embedded runtime chunk for one bundle and one common for the rest
const STANDALONE_ENTRYPOINT_NAME = "entry_name";

module.exports = {
  ...
  optimization: {
    ...
    runtimeChunk: {
      name: ({ name }) => (name === STANDALONE_ENTRYPOINT_NAME ? STANDALONE_ENTRYPOINT_NAME : 'runtime')
    },
    ...
  },
  ...
};