pico-log

An incredibly tiny javascript logging library.

pico-log was inspired by the lovely package loglevel. However loglevel lacks one key feature, the ability to set your own logging functions. pico-log implements the best parts of loglevel, with this feature added.

install

npm install --save pico-log

features

• 32 lines of code
• Log on 5 different levels, trace, debug, info, warn, error
• Doesn't use wrappers so it maintains stack trace integrity
• Able to overwrite the logging function at each level
• Attempts to use the most appropriate console function, falls back onto console.log
• Defaults to warn level, so if you forget to set a level your production enviroment won't explode with logs

documentation

usage

    const log = require('pico-log');
    log.setLevel('info');

    log.debug('Fancy message', false, 6, { nifty : true})

logging

• log.trace(arg1, arg2,...)
• log.debug(arg1, arg2,...)
• log.info(arg1, arg2,...)
• log.warn(arg1, arg2,...)
• log.error(arg1, arg2,...)

log.setLevel(level)

Disable logging below the specified level. level can be the following:

• Internal log level, eg. log.levels.SILENT
• Case-insenstive string, eg. 'error'
• Numerical index from 0 (trace) to 5 (silent)

log.getLevel()

Returns the current log level as a number, 0 (trace) to 5 (silent).

log.levels

Access to pico-logs internal log level list, eg. log.levels.WARN == 3

overwriting log methods

To overwrite a log method, simply assign the function you want to run into the library, eg.

    log.debug = (...args)=>{
        console.log('DEBUG', ...args);
    }

    log.debug('test');

Note: After you overwrite a method, it will log regardless of the level set until log.setLevel() is called. pico-log caches the logging methods when you set the level and then switches the available methods based on the log level.

If you care about your stacktraces, try not to use wrapper functions when overwriting log methods as best as you can. They will clutter up your stacktraces.