Function webpack

index.js:19–340

(config, options)

  (nextConfig = {}) =>
    Object.assign({}, nextConfig, {
      webpack(config, options) {
        const {
          webpack,
          buildId,
          dev,
          config: { distDir = '.next', pageExtensions = ['tsx', 'ts', 'jsx', 'js', 'mdx'], experimental = {} }
        } = options

        let basePath = options.config.basePath
        if (!basePath) basePath = '/'

        // For workbox configurations:
        // https://developers.google.com/web/tools/workbox/reference-docs/latest/module-workbox-webpack-plugin.GenerateSW
        const {
          disable = false,
          register = true,
          dest = distDir,
          sw = 'sw.js',
          cacheStartUrl = true,
          dynamicStartUrl = true,
          dynamicStartUrlRedirect,
          skipWaiting = true,
          clientsClaim = true,
          cleanupOutdatedCaches = true,
          additionalManifestEntries,
          ignoreURLParametersMatching = [],
          importScripts = [],
          publicExcludes = ['!noprecache/**/*'],
          buildExcludes = [],
          modifyURLPrefix = {},
          manifestTransforms = [],
          fallbacks = {},
          cacheOnFrontEndNav = false,
          reloadOnOnline = true,
          scope = basePath,
          customWorkerDir = 'worker',
          subdomainPrefix, // deprecated, use basePath in next.config.js instead
          ...workbox
        } = pluginOptions

        if (typeof nextConfig.webpack === 'function') {
          config = nextConfig.webpack(config, options)
        }

        if (disable) {
          options.isServer && console.log('> [PWA] PWA support is disabled')
          return config
        }

        if (subdomainPrefix) {
          console.error(
            '> [PWA] subdomainPrefix is deprecated, use basePath in next.config.js instead: https://nextjs.org/docs/api-reference/next.config.js/basepath'
          )
        }

        console.log(`> [PWA] Compile ${options.isServer ? 'server' : 'client (static)'}`)

        let { runtimeCaching = defaultCache } = pluginOptions