From 5445ecba199643d9abb63100d743d3b86a398a07 Mon Sep 17 00:00:00 2001
From: Maximilian Krause <max@kuatsu.de>
Date: Fri, 4 Sep 2026 21:40:12 +0200
Subject: [PATCH] fix(metro-transform-plugins): preserve Platform.select
 initializers

---
 .../src/__tests__/inline-plugin-test.js            | 14 ++++++++++++++
 .../metro-transform-plugins/src/inline-plugin.js   | 13 +++++++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/packages/metro-transform-plugins/src/__tests__/inline-plugin-test.js b/packages/metro-transform-plugins/src/__tests__/inline-plugin-test.js
index fe2fb8d154..816692c5a2 100644
--- a/packages/metro-transform-plugins/src/__tests__/inline-plugin-test.js
+++ b/packages/metro-transform-plugins/src/__tests__/inline-plugin-test.js
@@ -410,6 +410,20 @@ describe('inline constants', () => {
     });
   });
 
+  test('does not discard impure Platform.select initializers', () => {
+    const code = `
+      var value = Platform.select({
+        ios: selected(),
+        android: discarded(),
+      });
+    `;
+
+    compare([inlinePlugin], code, code, {
+      inlinePlatform: true,
+      platform: 'ios',
+    });
+  });
+
   test('inlines Platform.select in the code when using an ObjectMethod', () => {
     const code = `
       function a() {
diff --git a/packages/metro-transform-plugins/src/inline-plugin.js b/packages/metro-transform-plugins/src/inline-plugin.js
index 4fc5dfb49d..73b163422f 100644
--- a/packages/metro-transform-plugins/src/inline-plugin.js
+++ b/packages/metro-transform-plugins/src/inline-plugin.js
@@ -200,8 +200,17 @@ export default function inlinePlugin(
               findProperty(arg, 'native', () =>
                 findProperty(arg, 'default', () => t.identifier('undefined')),
               );
-
-            path.replaceWith(findProperty(arg, opts.platform, fallback));
+            const selected = findProperty(arg, opts.platform, fallback);
+
+            if (
+              arg.properties.every(
+                property =>
+                  (isObjectProperty(property) && property.value === selected) ||
+                  scope.isPure(property),
+              )
+            ) {
+              path.replaceWith(selected);
+            }
           }
         }
       },