snapshot of https://github.com/TanStack/query.git (main, 2026-09-16; blobs > 131072B omitted)

examples/react/shadow-dom/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

examples/react/shadow-dom/README.md

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+# Example
+
+To run this example:
+
+- `pnpm install`
+- `pnpm run dev`

examples/react/shadow-dom/eslint.config.js

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+import { tanstackConfig } from '@tanstack/eslint-config'
+import pluginQuery from '@tanstack/eslint-plugin-query'
+import pluginReact from '@eslint-react/eslint-plugin'
+
+export default [
+  ...tanstackConfig,
+  ...pluginQuery.configs['flat/recommended'],
+  pluginReact.configs.recommended,
+]

examples/react/shadow-dom/index.html

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+<!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" />
+    <title>Vite + React + TS</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

examples/react/shadow-dom/package.json

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+{
+  "name": "@tanstack/query-example-react-shadow-dom",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@tanstack/react-query": "^5.102.8",
+    "@tanstack/react-query-devtools": "^5.102.8",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.1",
+    "@types/react-dom": "^19.0.2",
+    "@vitejs/plugin-react": "^4.3.4",
+    "typescript": "5.8.3",
+    "vite": "^6.4.1"
+  }
+}

examples/react/shadow-dom/src/DogList.tsx

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+import { useQuery } from '@tanstack/react-query'
+
+type DogsResp = {
+  message: {
+    [dog: string]: Array<string>
+  }
+}
+
+export const DogList = () => {
+  const { data, status } = useQuery<DogsResp>({
+    queryKey: ['dogs'],
+    queryFn: async () => {
+      const resp = await fetch('https://dog.ceo/api/breeds/list/all')
+      if (resp.ok) {
+        return resp.json()
+      }
+      throw new Error('something went wrong')
+    },
+  })
+
+  if (status === 'pending') return 'Loading...'
+
+  if (status === 'error') return 'Error!'
+
+  const dogs = Object.keys(data.message)
+
+  return (
+    <div>
+      {dogs.map((dog) => (
+        <div key={dog}>{dog}</div>
+      ))}
+    </div>
+  )
+}

examples/react/shadow-dom/src/index.css

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+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}

examples/react/shadow-dom/src/main.tsx

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+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import './index.css'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { ReactQueryDevtools } from '@tanstack/react-query-devtools'
+import { DogList } from './DogList'
+
+const appRoot = document.getElementById('root')
+if (!appRoot) throw new Error('Missing #root element')
+
+const queryClient = new QueryClient()
+const shadowRoot = appRoot.attachShadow({ mode: 'open' })
+const root = ReactDOM.createRoot(shadowRoot)
+
+root.render(
+  <React.StrictMode>
+    <QueryClientProvider client={queryClient}>
+      <div
+        style={{
+          width: '100vw',
+          padding: '30px',
+        }}
+      >
+        <h2>Dog Breeds</h2>
+        <DogList />
+      </div>
+      <ReactQueryDevtools
+        initialIsOpen={false}
+        buttonPosition="bottom-left"
+        shadowDOMTarget={shadowRoot}
+      />
+    </QueryClientProvider>
+  </React.StrictMode>,
+)

examples/react/shadow-dom/src/vite-env.d.ts

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+/// <reference types="vite/client" />

examples/react/shadow-dom/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "Bundler",
+    "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src", "eslint.config.js"]
+}

examples/react/shadow-dom/vite.config.ts

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+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})