build: fix sourcemap warnings (#7318)

craco.config.cjs

@@ -131,6 +131,12 @@ module.exports = {
         },
       })
 
+      // Retain source maps for node_modules packages:
+      webpackConfig.module.rules[0] = {
+        ...webpackConfig.module.rules[0],
+        exclude: /node_modules/,
+      }
+
       // Configure webpack transpilation (create-react-app specifies transpilation rules in a oneOf):
       webpackConfig.module.rules[1].oneOf = webpackConfig.module.rules[1].oneOf.map((rule) => {
         if (rule.loader && rule.loader.match(/babel-loader/)) {
@@ -170,13 +176,6 @@ module.exports = {
       // Configure webpack resolution. webpackConfig.cache is unused with swc-loader, but the resolver can still cache:
       webpackConfig.resolve = Object.assign(webpackConfig.resolve, { unsafeCache: true })
 
-      webpackConfig.ignoreWarnings = [
-        // Source mappings for a package will fail if the package does not provide them, but the build will still succeed,
-        // so it is unnecessary (and bothersome) to log it. This should be turned off when debugging missing sourcemaps.
-        // See https://webpack.js.org/loaders/source-map-loader#ignoring-warnings.
-        /Failed to parse source map/,
-      ]
-
       return webpackConfig
     },
   },

package.json

@@ -20,7 +20,7 @@
     "start": "craco start",
     "start:cloud": "NODE_OPTIONS=--dns-result-order=ipv4first PORT=3001 npx wrangler pages dev --compatibility-flags=nodejs_compat --compatibility-date=2023-08-01 --proxy=3001 --port=3000 -- yarn start",
     "build": "craco build",
-    "analyze": "source-map-explorer 'build/static/js/*.js' --only-mapped",
+    "analyze": "source-map-explorer 'build/static/js/*.js' --no-border-checks --gzip",
     "serve": "serve build -s -l 3000",
     "lint": "yarn eslint --ignore-path .gitignore --cache --cache-location node_modules/.cache/eslint/ .",
     "typecheck": "tsc",