React Review Audit

**Score: 99/100** · 0 errors · 1 warning

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```text
Fix the following React Review diagnostics in my codebase.

## Warnings (1)

1. [warning] no-react-dom-deprecated-apis — src/index.js:9
ReactDOM.render is the legacy root API — switch to `import { createRoot } from 'react-dom/client'` and call `createRoot(container).render(...)` (REMOVED in React 19)
```

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### ⚠️ Warnings (1)

**`no-react-dom-deprecated-apis`**

ReactDOM.render is the legacy root API — switch to `import { createRoot } from 'react-dom/client'` and call `createRoot(container).render(...)` (REMOVED in React 19)

> Switch the legacy `react-dom` root API (`render` / `hydrate` / `unmountComponentAtNode`) to `createRoot` / `hydrateRoot` / `root.unmount()` from `react-dom/client`. Replace `findDOMNode` with a ref. The whole `react-dom/test-utils` entry point is removed in React 19 — use `act` from `react` and `fireEvent` / `render` from `@testing-library/react`. Only enabled on projects detected as React 18+.

[`src/index.js:9`](https://github.com/celeroncoder/firebase-redux-auth/blob/b99ece4a4b95de53893d62702f7a91ea7f393ee8/src/index.js#L9)

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_{Last scored May 14, 2026 at 9:39 AM UTC. Maintained by [React Review](https://github.com/millionco/react-review).}