Check enable before writing to log

Is there a way to check if a log level is enabled by a logger instance before writing to it?

if (logger.debug_enabled) {
  var msg = ...; // expensive op to compute a verbose message
  logger.debug(msg);
}

[samngms]

@indexzero I believe you misunderstood the question. logger.debug is defined as long as the level is “defined” not “enabled” One possible way to do is something like the following

if ( logger.levels[logger.level] >= logger.levels['debug'] ) {
    // do some expensive calculation
    logger.debug(...)
}

[indexzero]

No. You would know implicitly throughout your application what levels are available if you called setLevels once yourself. By default logger.debug exists.