From b145bfa7ccd9dae018a93c0eeb3660642cf26c33 Mon Sep 17 00:00:00 2001
From: Josh Black <joshblack@github.com>
Date: Tue, 8 Jul 2025 14:16:11 -0500
Subject: [PATCH 1/2] ci: add support for testing React 19

---
 .github/workflows/ci.yml  | 10 ++++++++
 script/setup-react-19.mts | 49 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 script/setup-react-19.mts

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7819ca11b48..3eb4fa816a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,6 +53,9 @@ jobs:
 
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        react-version: [18, 19]
     steps:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
@@ -61,6 +64,8 @@ jobs:
         with:
           node-version: 22
           cache: 'npm'
+      - if: ${{ matrix.react-version == 19 }}
+        run: node --experimental-strip-types script/setup-react-19.mts
       - name: Install dependencies
         run: npm ci
       - name: Build
@@ -74,6 +79,9 @@ jobs:
 
   type-check:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        react-version: [18, 19]
     steps:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
@@ -82,6 +90,8 @@ jobs:
         with:
           node-version: 22
           cache: 'npm'
+      - if: ${{ matrix.react-version == 19 }}
+        run: node --experimental-strip-types script/setup-react-19.mts
       - name: Install dependencies
         run: npm ci
       - name: Build project
diff --git a/script/setup-react-19.mts b/script/setup-react-19.mts
new file mode 100644
index 00000000000..75c8ca67baf
--- /dev/null
+++ b/script/setup-react-19.mts
@@ -0,0 +1,49 @@
+import fs from 'node:fs'
+import {spawn as spawnCallback} from 'node:child_process'
+import path from 'node:path'
+import {promisify} from 'node:util'
+
+const spawn = promisify(spawnCallback)
+const ROOT_DIRECTORY = path.resolve(import.meta.dirname, '../')
+const workspaces = ['examples/codesandbox', 'examples/nextjs', 'examples/theming', 'packages/react']
+
+async function main() {
+  const overrides = {
+    react: '19.1.0',
+    'react-dom': '19.1.0',
+    'react-test-renderer': '19.1.0',
+    '@types/react': '19.1.4',
+    '@types/react-dom': '19.1.5',
+  } as const
+
+  for (const workspace of workspaces) {
+    const packageJsonPath = path.join(ROOT_DIRECTORY, workspace, 'package.json')
+    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf-8'))
+
+    for (const [key, value] of Object.entries(overrides)) {
+      if (packageJson.devDependencies?.[key]) {
+        packageJson.devDependencies[key] = value
+      }
+
+      if (packageJson.dependencies?.[key]) {
+        packageJson.dependencies[key] = value
+      }
+
+      if (packageJson.peerDependencies?.[key]) {
+        packageJson.peerDependencies[key] = value
+      }
+    }
+
+    fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson, null, 2) + '\n')
+  }
+
+  await spawn('npm', ['install'], {
+    cwd: ROOT_DIRECTORY,
+    stdio: 'inherit',
+  })
+}
+
+main().catch(error => {
+  console.error(error)
+  process.exit(1)
+})

From 9cd2049cae9239de723941be13cc31ad7edc4b63 Mon Sep 17 00:00:00 2001
From: Josh Black <joshblack@github.com>
Date: Tue, 8 Jul 2025 14:26:02 -0500
Subject: [PATCH 2/2] ci: disable fail fast

---
 .github/workflows/ci.yml | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3eb4fa816a0..356022c096e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,8 +54,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
-        react-version: [18, 19]
+        react-version: [react-18, react-19]
     steps:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
@@ -64,7 +65,7 @@ jobs:
         with:
           node-version: 22
           cache: 'npm'
-      - if: ${{ matrix.react-version == 19 }}
+      - if: ${{ matrix.react-version == 'react-19' }}
         run: node --experimental-strip-types script/setup-react-19.mts
       - name: Install dependencies
         run: npm ci
@@ -80,8 +81,9 @@ jobs:
   type-check:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
-        react-version: [18, 19]
+        react-version: [react-18, react-19]
     steps:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
@@ -90,7 +92,7 @@ jobs:
         with:
           node-version: 22
           cache: 'npm'
-      - if: ${{ matrix.react-version == 19 }}
+      - if: ${{ matrix.react-version == 'react-19' }}
         run: node --experimental-strip-types script/setup-react-19.mts
       - name: Install dependencies
         run: npm ci