npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@lordfokas/loggamus

v2.0.1

Published

An easy to use out-of-the-box, flexible and configurable logger for NodeJS, with no required external dependencies! Now with TypeScript support.

Downloads

4

Readme

Loggamus

An easy to use out-of-the-box, flexible and configurable logger for NodeJS, with no required external dependencies! Now featuring TypeScript support.

Features

Easy to use

  • [x] Default (no configs given) Logger instance prints any LogLevel to the terminal (and in color)
  • [x] Static Logger methods re-route to a global Logger (called "default", which starts off as a default Logger instance)

Configurable

  • [x] Child Loggers inherit parent configuration by default
  • [x] Everything in a Logger can be reconfigured

Pretty Printer

  • [x] Provides colorful terminal output
  • [x] You can also create your own instance to write colorful messages to the terminal yourself
  • [x] A default instance will output straight to stdout

Logging Levels

  • [x] Define the minimum level to log messages (default is everything)
  • [x] Define the minimum level at which messages also print the caller stack frame (default is error)
  • [x] Style of printed messages is fully configurable per LogLevel
  • [x] Ability to create your own LogLevels

Output Pipeline

  • [x] Define where and how logged messages are sent
  • [x] File and Terminal output pipes out of the box
  • [x] Any pipe will replicate messages among all children outputs
  • [x] Mapper pipe will transform messages that go through it
  • [x] Filter pipe will drop messages that fail to meet given criteria

Simplified Architecture Diagram

Simplified Architecture Diagram

Basic usage -- for when you want to hit the ground running.

( examples/00-basic.js )

import { Logger } from '@lordfokas/loggamus';

Logger.setAppRoot(3);

(function (){
	Logger.fatal("This is a fatal error!");
})();

(function named_function(){
	Logger.error("This is a recoverable error...");
})();

Logger.warn("I'll only warn you this once.");
Logger.info("Information is the currency of modern times...");
Logger.debug("Debugging: The fun mystery game where you are\nthe detective, the victim, and the murderer!!");
Logger.fine("This level of information is so fine that it probably doesn't matter.");

Basic Usage

Pretty Printer -- used internally, but available to you too!

( examples/01-pretty.js )

import { PrettyPrinter } from '@lordfokas/loggamus';

const pretty = new PrettyPrinter();

// All printer methods return "this", so you can chain anything.
pretty
	.color('green') // set foreground color. There's .background() too.
	.write('Sometimes, ') // write text
	.style('underline', 'bright') // change style
	.color('red')
	.write('all', ' you', ' want') // takes multiple args
	.endl() // add 1 '\n'. If you pass it a number, it adds that many.
	.reset() // reset the styles -- is a shortcut to style('reset')
	.style('bright') // could have been style('reset', 'bright') instead
	.color('yellow') // unfortunately it also resets all the colors :(
	.write('is some pretty text!');

// The printer stores everything in an internal buffer
// and won't write anything until you flush it.
// When you flush it, it prints the whole buffer as a single message.
// Flushing also resets the printer to the initial state
// and returns "this" so you can keep going with the same instance.
pretty.flush();

// All the colors. Dim and Bright variations. Default style is Dim.
pretty.endl();
for(const c of [
	'black', 'red', 'green', 'yellow',
	'blue', 'magenta', 'cyan', 'white'
]){
	let bg = 'black';
	if(c == 'black') bg = 'white';
	pretty.background(bg).color(c).write(' test ').style('reverse').write(' test ').flush();
	pretty.style('bright');
	pretty.background(bg).color(c).write(' test ').style('reverse').write(' test ').flush();
}

// All the styles
pretty.endl();
pretty.style('underline').write('Underline. Underscore is also an alias.').flush();
pretty.style('bright').write('Bright makes foreground colors brighter. Duh.').flush();
pretty.style('dim').write('Dim makes colors dimmer. This is the default console style.').flush();
pretty.style('reverse').write('Reverse swaps background and foreground colors.').flush();
pretty.endl();
pretty.color('red').style('bright', 'underline')
	.write('I have no idea how to make these work, but I mapped them from the VT100 spec anyways:').flush();
pretty.style('blink').write('I have no idea how Blink works, but the control char is mapped. Good luck.').flush();
pretty.style('hidden').write('Hidden is also weird, at least in my terminal. But here you go.').flush();

Pretty Printing

Overriding defaults -- Don't like my style or configs? Define yours!

( examples/02-override.js)

import { Logger, LogLevel, Pipe, Output, Transformer } from '@lordfokas/loggamus';

Logger.setAppRoot(3); // paths in stack traces start 2 levels above this file

Logger.setDefault(new Logger('root', {
	minlevel: LogLevel.WARN, // Logs below WARN will not log
	mintrace: LogLevel.FATAL, // Logs below FATAL won't display stack traces
	tracedepth: 5, // stack traces are at most 5 stack frames deep
	output: new Pipe( // any pipe (except outputs) replicates logs it receives between its children
		new Output.Terminal(), // output that writes pretty logs to terminal
		new Transformer.MetadataHeader( // transformer that adds metadata to the log message
			new Output.File('./examples.log') // output that writes raw logs to disk
		)
	)
}));

(function (){
	Logger.fatal("This is a fatal error!", {
		subject: 'this is custom metadata',
		function: 'anything we add here travels with our logs',
		destination: 'all the way to the target systems',
		correlationid: 'deadbeef-1337-cafe-babe-0123456789fe' // this is a valid UUID :)
	});
})();

(function named_function(){
	Logger.error("This is a recoverable error...");
})();

// Child logger will inherit everything from the parent, unless we override it.
const child = Logger.getDefault().child('child-01');
child.warn("I'll only warn you this once.");

// these will never be seen because the log level is too high
child.info("Information is the currency of modern times...");
child.debug("Debugging: The fun mystery game where you are\nthe detective, the victim, and the murderer!!");
child.fine("This level of information is so fine that it probably doesn't matter.");

Overriding defaults

Output to example.log :

********************************************************************************
{
  logger: 'root',
  timestamp: '2020-10-24T23:43:37.820Z',
  level: 'FATAL',
  levelid: 5,
  caller: '<Lambda Function>',
  source: 'loggamus/examples/02-override.js:20',
  metadata: {
    subject: 'this is custom metadata',
    function: 'anything we add here travels with our logs',
    destination: 'all the way to the target systems',
    correlationid: 'deadbeef-1337-cafe-babe-0123456789fe'
  }
}
--------------------------------------------------------------------------------
This is a fatal error!
@ <Lambda Function>  ( loggamus/examples/02-override.js:20 )
@ <Lambda Function>  ( loggamus/examples/02-override.js:26 )
@ ModuleJob.run  ( internal/modules/esm/module_job.js:146 )
@ Loader.import  ( internal/modules/esm/loader.js:165 )
@ Object.loadESM  ( internal/process/esm_loader.js:68 )


********************************************************************************


********************************************************************************
{
  logger: 'root',
  timestamp: '2020-10-24T23:43:37.832Z',
  level: 'ERROR',
  levelid: 4,
  caller: 'named_function',
  source: 'loggamus/examples/02-override.js:29'
}
--------------------------------------------------------------------------------
This is a recoverable error...

********************************************************************************


********************************************************************************
{
  logger: 'root/child-01',
  timestamp: '2020-10-24T23:43:37.834Z',
  level: 'WARN',
  levelid: 3,
  caller: '<Lambda Function>',
  source: 'loggamus/examples/02-override.js:34'
}
--------------------------------------------------------------------------------
I'll only warn you this once.

********************************************************************************