Handle logs from client (browser).

def log_handler(level: str, message: str) -> None:
    """Handle logs from client (browser)."""
    message = 'JS: ' + str(message)
    if level == 'error':
        logger.error(message)
    elif level == 'warn':
        logger.warning(message)
    elif level == 'info':
        logger.info(message)
    elif level == 'debug':
        logger.debug(message)