logger

The logger option provides custom logging for React Compiler events during compilation.

```js: ${filename}`); } } }

---

## Reference
### `logger`
Configures custom logging to track compiler behavior and debug issues.

#### Type

{ logEvent: (filename: string | null, event: LoggerEvent) => void; } | null

#### Default value
`null`

#### Methods
- **`logEvent`**: Called for each compiler event with the filename and event details

#### Event types
- **`CompileSuccess`**: Function successfully compiled
- **`CompileError`**: Function skipped due to errors
- **`CompileDiagnostic`**: Non-fatal diagnostic information
- **`CompileSkip`**: Function skipped for other reasons
- **`PipelineError`**: Unexpected compilation error
- **`Timing`**: Performance timing information

#### Caveats
- Event structure may change between versions
- Large codebases generate many log entries

---

## Usage
### Basic logging
Track compilation success and failures:

```js`);
          break;
        }
        case 'CompileError': {
          console.log(`❌ Skipped: ${filename}`);
          break;
        }
        default: {}
      }
    }
  }
}

Detailed error logging

Get specific information about compilation failures:

```js); console.error(Reason: ${event.detail.reason}`);

    if (event.detail.description) {
      console.error(`Details: ${event.detail.description}`);
    }

    if (event.detail.loc) {
      const { line, column } = event.detail.loc.start;
      console.error(`Location: Line ${line}, Column ${column}`);
    }

    if (event.detail.suggestions) {
      console.error('Suggestions:', event.detail.suggestions);
    }
  }
}

} }