# Avoid console.log when logging library exists

- ID: javascript-avoid-console-log
- Severity: low
- CWE: Insufficient Logging (CWE-778)
- Languages: JavaScript, TypeScript
- Frameworks: nodejs, express, fastify

## Description

Detects console.log calls when a logging library exists. Only fires when winston, pino, bunyan, or log4js is detected.

## Remediation

Replace console.log with your logging library.

```javascript
// winston
logger.info('User logged in', { userId });

// pino
logger.info({ userId }, 'User logged in');
```

Learn more: https://shoulder.dev/learn/javascript/cwe-778/avoid-console-log

## Related Rules

- **Avoid print() when logging module exists** [low]: 
- **Insufficient Security Event Logging** [MEDIUM]: