feat(react): Add React implementations for v0.9 Basic Catalog components and tests

.github/workflows/react_renderer.yml

@@ -58,6 +58,14 @@ jobs:
       - name: Test React renderer
         working-directory: ./renderers/react
         run: npm test
+
+      - name: Build React Demo
+        working-directory: ./renderers/react
+        run: npm run build:demo
+
+      - name: Test React Demo
+        working-directory: ./renderers/react
+        run: npm run test:demo
   lint:
     runs-on: ubuntu-latest
 

.gitignore

@@ -24,3 +24,4 @@ a2a_agents/python/a2ui_agent/src/a2ui/assets/**/*.json
 agent_sdks/python/src/a2ui/assets/**/*.json
 ## Generated JS file from the strictly-typed `sandbox.ts`. 
 samples/client/angular/projects/mcp_calculator/public/sandbox_iframe/sandbox.js
+*.tsbuildinfo

renderers/react/a2ui_explorer/README.md

@@ -0,0 +1,62 @@
+# A2UI React Gallery App
+
+This is the reference Gallery Application for the A2UI React renderer. It allows you to explore A2UI samples, inspect the live data model, and step through the message rendering process.
+
+## Prerequisites
+
+This application depends on the following local libraries in this repository:
+1. `@a2ui/web_core` (located in `renderers/web_core`)
+2. `@a2ui/react_prototype` (located in `renderers/react_prototype`)
+
+## Building Dependencies
+
+Before running the gallery app, you must build the local renderer library:
+
+```bash
+# Navigate to the React renderer library
+cd ../../../renderers/react_prototype
+
+# Install and build the library
+npm install
+npm run build
+```
+
+*Note: Ensure `@a2ui/web_core` is also built if you have made changes to the core logic.*
+
+## Setup and Development
+
+Once the dependencies are built, you can start the gallery app:
+
+```bash
+# Navigate to this directory
+cd samples/client/react
+
+# Install dependencies
+npm install
+
+# Start the development server
+npm run dev
+```
+
+## Building for Production
+
+To create a production build of the gallery app:
+
+```bash
+npm run build
+```
+
+## Running Tests
+
+To run the integration tests:
+
+```bash
+npm test
+```
+
+## Gallery Features
+
+- **3-Column Layout**: Left (Sample selection), Center (Live preview & Message stepper), Right (Data model & Action logs).
+- **Progressive Stepper**: Use the "Advance" buttons next to each JSON message to see how the UI builds up incrementally.
+- **Action Logs**: View real-time logs of actions triggered by user interactions.
+- **Data Model Inspector**: Observe how the surface's data model changes as you interact with form fields.

renderers/react/a2ui_explorer/eslint.config.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])

renderers/react/a2ui_explorer/index.html

@@ -0,0 +1,30 @@
+<!--
+ Copyright 2026 Google LLC
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200" />
+    <title>react</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

renderers/react/a2ui_explorer/src/App.css

@@ -0,0 +1,58 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}