From 827098e0d3ed4a5cf3eaa5bf5891accc6203ac14 Mon Sep 17 00:00:00 2001
From: epicexcelsior <epicexcelsior@gmail.com>
Date: Tue, 19 May 2026 03:19:16 -0800
Subject: [PATCH] build(babel): enable class static blocks for three.js
 bundling
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three.js (pulled in by the mesh-map renderer) uses ES2022 class static
blocks. babel-preset-expo's default target list doesn't include the
transform, so iOS bundling fails with "Static class blocks are not
enabled" — Metro returns 500 on every bundle request and the dev-client
can't fetch JS at all. No babel.config.js existed; this adds one with
preset-expo + the missing plugin.

The plugin was already in node_modules transitively (pulled in by
@babel/preset-env), so this is config-only — no new dep, no native rebuild.
---
 mobile_app/babel.config.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 mobile_app/babel.config.js

diff --git a/mobile_app/babel.config.js b/mobile_app/babel.config.js
new file mode 100644
index 0000000..f3c5f43
--- /dev/null
+++ b/mobile_app/babel.config.js
@@ -0,0 +1,13 @@
+module.exports = function (api) {
+  api.cache(true);
+  return {
+    presets: ['babel-preset-expo'],
+    plugins: [
+      // three.js (pulled in by the mesh-map renderer) uses ES2022 class
+      // static blocks. babel-preset-expo's default target list doesn't
+      // include the transform, so iOS bundling fails with "Static class
+      // blocks are not enabled" before the dev-client can fetch anything.
+      '@babel/plugin-transform-class-static-block',
+    ],
+  };
+};