cases / real-realworld-react-19

real-realworld-react-19

react-dom 16.3.0 → 19.0.0

The RealWorld reference frontend (React + Redux, ~5.6k stars) upgraded to React 19. One real ReactDOM.render call against eleven class-component render() methods.

npm real repo gothinkster/react-redux-realworld-example-app @ee72eba ↗

grep-baseline

1 right 11 wrong

<0.1s · $0.00

agent · deepseek-v4-flash-free

1 right 0 wrong

25.5s · $0.00

Release notes

The input. Checked in with the case so a scoring run measures the detector, not whether upstream's site is reachable.

React 19

Removed: `ReactDOM.render`

ReactDOM.render has been removed. Use createRoot from react-dom/client instead:

// Before
import ReactDOM from 'react-dom';
ReactDOM.render(<App />, container);

// After
import { createRoot } from 'react-dom/client';
createRoot(container).render(<App />);

Removed: `ReactDOM.hydrate`

ReactDOM.hydrate has been removed. Use hydrateRoot instead.

Removed: `unmountComponentAtNode`

Use root.unmount() instead.

Removed: `ReactDOM.findDOMNode`

Use refs instead.

What each detector said

One row per (file, symbol) site — the unit the scorer compares on. Ground truth comes from the case's hand-written labels.

12 sites · 11 where a detector is wrong only show mistakes

not broken src/components/App.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  51  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Article/CommentInput.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  31  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Article/index.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  33  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Editor.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  94  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Header.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  73  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Home/index.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  44  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/ListErrors.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
   4  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Login.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  40  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Profile.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
 111  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Register.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method.
1 matched line · reasoning
```
  45  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
not broken src/components/Settings.js :render grep-baseline flagged agent · deepseek-v4-flash-free silent

Class component render() method (two, at lines 63 and 140).
2 matched lines · reasoning
```
  63  render() {
 140  render() {
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.
breaks src/index.js :render grep-baseline flagged agent · deepseek-v4-flash-free flagged

The only react-dom import in the repository, and the only real ReactDOM.render call (line 11).
1 matched line · reasoning
```
  11  ReactDOM.render((
```
grep-baseline conf 0.50
'ReactDOM.render' is named in the release notes and appears in 13 place(s) in this repo. No check was made that these are real call sites.