fix: transpile private class methods in the starter build

packages/core/.babelrc.js

@@ -2,11 +2,19 @@ const { babelOptimizerPlugin } = require('@graphql-codegen/client-preset')
 
 module.exports = {
   presets: ['next/babel'],
-  /** Replaces gql function calls for imports to the document data */
   plugins: [
+    /** Replaces gql function calls for imports to the document data */
     [
       babelOptimizerPlugin,
       { artifactDirectory: './@generated', gqlTagName: 'gql' },
     ],
+    /**
+     * With modern browserslist targets, `next/babel` skips the private-methods
+     * transform but still applies class-properties, which then throws on
+     * `#method()`. Middleware dependencies get transpiled too, so a private
+     * method in a dependency such as `jose` is enough to fail the build.
+     * Enabling this unconditionally keeps the build off caniuse-lite drift.
+     */
+    '@babel/plugin-transform-private-methods',
   ],
 }

packages/core/package.json

@@ -46,6 +46,7 @@
   "sideEffects": false,
   "dependencies": {
     "@antfu/ni": "^0.21.12",
+    "@babel/plugin-transform-private-methods": "7.25.9",
     "@builder.io/partytown": "^0.6.1",
     "@envelop/core": "^5.0.2",
     "@envelop/graphql-jit": "^8.0.3",
@@ -88,7 +89,7 @@
     "idb-keyval": "^5.1.3",
     "include-media": "^1.4.10",
     "isomorphic-unfetch": "^3.1.0",
-    "jose": "^6.2.3",
+    "jose": "6.2.8",
     "lexical": "^0.34.0",
     "next": "^13.5.9",
     "next-logger": "^5.0.2",

turbo.json

@@ -16,7 +16,7 @@
     "build": {
       "dependsOn": ["^build"],
       "env": ["BASE_SITE_URL"],
-      "outputs": ["dist/**"]
+      "outputs": ["dist/**", "@generated/**"]
     },
     "test": {
       "dependsOn": ["^build"]