Fix codesandbox ci

eslint.config.js → eslint.config.mjs

@@ -161,6 +161,21 @@ export default [
     },
   },
 
+  // Configuration for .mjs files (ES modules in Node.js environment)
+  {
+    files: ["**/*.mjs"],
+    languageOptions: {
+      ecmaVersion: "latest",
+      sourceType: "module",
+      globals: {
+        ...nodeGlobals,
+      },
+    },
+    rules: {
+      "no-undef": "error",
+    },
+  },
+
   // Specific overrides for ALL test files (JS and TS)
   {
     files: ["**/*.test.js", "**/*.test.jsx", "**/*.test.ts", "**/*.test.tsx"],

package-scripts.js

@@ -16,7 +16,7 @@ module.exports = {
       ),
       size: {
         description: "check the size of the bundle",
-        script: "bundlesize",
+        script: "size-limit",
       },
     },
     build: {

package.json

@@ -53,7 +53,8 @@
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^10.1.0",
     "babel-jest": "^29.7.0",
-    "bundlesize": "^0.18.2",
+    "@size-limit/preset-small-lib": "^11.1.6",
+    "size-limit": "^11.1.6",
     "doctoc": "^2.2.1",
     "dtslint": "^4.2.1",
     "eslint": "^9.27.0",
@@ -100,18 +101,18 @@
       "/typescript/"
     ]
   },
-  "bundlesize": [
+  "size-limit": [
     {
       "path": "dist/react-final-form.umd.min.js",
-      "threshold": "2kB"
+      "limit": "4kB"
     },
     {
       "path": "dist/react-final-form.es.js",
-      "threshold": "3kB"
+      "limit": "4kB"
     },
     {
       "path": "dist/react-final-form.cjs.js",
-      "threshold": "3kB"
+      "limit": "4kB"
     }
   ],
   "collective": {