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productionBrowserSourceMaps

Source Maps are enabled by default during development. During production builds, they are disabled to prevent you leaking your source on the client, unless you specifically opt-in with the configuration flag.

Next.js provides a configuration flag you can use to enable browser source map generation during the production build:

next.config.js
module.exports = {
  productionBrowserSourceMaps: true,
}

When the productionBrowserSourceMaps option is enabled, the source maps will be output in the same directory as the JavaScript files. Next.js will automatically serve these files when requested.

  • Adding source maps can increase next build time
  • Increases memory usage during next build