From cee11955da7d7d63a93396429cb16937d6d27133 Mon Sep 17 00:00:00 2001
From: Selim Enes Erdogan <sellim81@gmail.com>
Date: Mon, 11 May 2026 09:18:56 +0300
Subject: [PATCH] Support Flow ReadOnlyArray type

---
 .../src/ConversionContext.js                        |  1 +
 .../__fixtures__/bugs/199-support-$ReadOnlyArray.js | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 packages/babel-plugin-flow-runtime/src/__tests__/__fixtures__/bugs/199-support-$ReadOnlyArray.js

diff --git a/packages/babel-plugin-flow-runtime/src/ConversionContext.js b/packages/babel-plugin-flow-runtime/src/ConversionContext.js
index d81d33b..e6cae1c 100644
--- a/packages/babel-plugin-flow-runtime/src/ConversionContext.js
+++ b/packages/babel-plugin-flow-runtime/src/ConversionContext.js
@@ -21,6 +21,7 @@ const FLOW_TYPENAMES = {
   $Supertype: '$supertype',
   $TupleMap: '$tupleMap',
   $Values: '$values',
+  $ReadOnlyArray: 'array',
   Class: 'Class'
 };
 
diff --git a/packages/babel-plugin-flow-runtime/src/__tests__/__fixtures__/bugs/199-support-$ReadOnlyArray.js b/packages/babel-plugin-flow-runtime/src/__tests__/__fixtures__/bugs/199-support-$ReadOnlyArray.js
new file mode 100644
index 0000000..3e705c3
--- /dev/null
+++ b/packages/babel-plugin-flow-runtime/src/__tests__/__fixtures__/bugs/199-support-$ReadOnlyArray.js
@@ -0,0 +1,13 @@
+/* @flow */
+
+export const input = `
+type Thing = $ReadOnlyArray<string | number>;
+
+const thing: Thing = [];
+`;
+
+export const expected = `
+  import t from "flow-runtime";
+  const Thing = t.type("Thing", t.array(t.union(t.string(), t.number())));
+  const thing = Thing.assert([]);
+`;