rsnext/examples/with-ant-design/next.config.js

const compose = (plugins) => ({
  webpack(config, options) {
    return plugins.reduce((config, plugin) => {
      if (plugin instanceof Array) {
        const [_plugin, ...args] = plugin
        plugin = _plugin(...args)
      }
      if (plugin instanceof Function) {
        plugin = plugin()
      }
      if (plugin && plugin.webpack instanceof Function) {
        return plugin.webpack(config, options)
      }
      return config
    }, config)
  },

  webpackDevMiddleware(config) {
    return plugins.reduce((config, plugin) => {
      if (plugin instanceof Array) {
        const [_plugin, ...args] = plugin
        plugin = _plugin(...args)
      }
      if (plugin instanceof Function) {
        plugin = plugin()
      }
      if (plugin && plugin.webpackDevMiddleware instanceof Function) {
        return plugin.webpackDevMiddleware(config)
      }
      return config
    }, config)
  },
})

const withBundleAnalyzer = require('@next/bundle-analyzer')

module.exports = compose([
  [
    withBundleAnalyzer,
    {
      enabled: process.env.ANALYZE === 'true',
    },
  ],
])