Viewing github.com/facebook/react/fixtures/stacks/Example.js

```
// Example
```
```
const x = React.createElement;
```

class ErrorBoundary extends React.Component {

  static getDerivedStateFromError(error) {

```
    return {
```
```
      error: error,
```
```
    };
```
```
  }
```

  componentDidCatch(error, errorInfo) {

    console.log(error.message, errorInfo.componentStack);

```
    this.setState({
```

      componentStack: errorInfo.componentStack,

```
    });
```
```
  }
```
```
  render() {
```

    if (this.state && this.state.error) {

```
      return x(
```
```
        'div',
```
```
        null,
```

        x('h3', null, this.state.error.message),

        x('pre', null, this.state.componentStack)

```
      );
```
```
    }
```
```
    return this.props.children;
```
```
  }
```
```
}
```
```
function Example() {
```
```
  let state = React.useState(false);
```
```
  return x(
```
```
    ErrorBoundary,
```
```
    null,
```
```
    x(
```
```
      DisplayName,
```
```
      null,
```
```
      x(
```
```
        React.unstable_SuspenseList,
```
```
        null,
```
```
        x(
```
```
          NativeClass,
```
```
          null,
```
```
          x(
```
```
            FrozenClass,
```
```
            null,
```
```
            x(
```
```
              BabelClass,
```
```
              null,
```
```
              x(
```
```
                BabelClassWithFields,
```
```
                null,
```
```
                x(
```
```
                  React.Suspense,
```
```
                  null,
```

                  x('div', null, x(Component, null, x(Throw)))

```
                )
```
```
              )
```
```
            )
```
```
          )
```
```
        )
```
```
      )
```
```
    )
```
```
  );
```
```
}
```

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