snooplogg

SnoopLogg

Laid back debug logging.

Installation

npm install snooplogg

Features

• Built-in and custom log levels
• Ability to snoop on other snooplogg instances nested in dependencies
• Pipe messages to one or more streams
• Namespacing
• Filter messages using the DEBUG (or SNOOPLOGG) environment variable
• Automatic color selection with brightness range
• Includes helper libraries for your convenience
  • chalk
  • figures (exported as symbols)
  • humanize
  • moment
  • pluralize
• Similar API to TJ's debug:
  • const debug = snooplogg('myapp').log;

Examples

import log from 'snooplogg';

log.trace('bow'); // writes to stdout/stderr if DEBUG matches + all pipes

log.info('wow')
   .warn('wow')
   .error('wow');

import snooplogg from 'snooplogg';

const log = snooplogg('myapp');
log.info('bow', 'wow', 'wow'); // writes to stdout/stderr if DEBUG=myapp + all pipes

import snooplogg from 'snooplogg';

const log = snooplogg.stdio('yippy yo');
log.info('bow', 'wow', 'wow'); // writes to stdout/stderr + all pipes

const log = snooplogg.enable('*')('yippy yay');
log.info('bow', 'wow', 'wow'); // writes to stdout/stderr + all pipes

import snooplogg from 'snooplogg';

const log = snooplogg
	.pipe(someWritableStream);

log.info('yippy', 'yo');

Listen for messages from all SnoopLogg instances, even from other dependencies.

import snooplogg, { snoop } from 'snooplogg';

snoop();

const log = snooplogg('bumpin');

log('one');
log
  .trace('two')
  .debug('three')
  .info('and to the four');

log.warn(`It's like this`);
log.error('and like that');
log.fatal('and like this');

import snooplogg, { type } from 'snooplogg';

type('jin', { color: 'cyan' });
type('juice', { color: 'yellow' });

const log = snooplogg();

log.jin('parents ain\'t home');
log.juice('too much drama', true);

API

snooplogg()

Creates a namespaced logger as well as defines the global namespaced logger.

snooplogg.log(msg)

Outputs a message using the standard console.log() format syntax.

snooplogg.config(options)

Allows you to set various instance specific options.

• colors - (Array) An array of color names to choose from when auto-selecting a color, specifically for rendering the namespace.
• minBrightness - (Number) The minimum brightness to auto-select a color. Value must be between 0 and 255 as well as less than or equal to the maxBrightness. Defaults to 80.
• maxBrightness - (Number) The maximum brightness to auto-select a color. Value must be between 0 and 255 as well as greater than or equal to the minBrightness. Defaults to 210.
• theme - (String) The name of the default theme to use. Defaults to standard.
• maxBufferSize - (Number) The maximum number of log lines to buffer. Used to flush prior messages to new pipes.

Returns the original SnoopLogg instance.

Enabling Logging

By default, Snooplogg only prints messages if the the DEBUG or SNOOPLOGG environment variables are set.

# macOS and Linux
$ DEBUG=izzle node loggfather.js

# Windows PowerShell
> $Env:DEBUG="izzle" node loggfather.js

# Windows Command Prompt
> set DEBUG=izzle
> node loggfather.js

Note: You may also use the SNOOPLOGG environment variable to avoid conflicts with other libraries that use debug

You can also use any environment variable you want by simply calling enable() before logging.

import snooplogg from 'snooplogg';

// change the global environment variable name
snooplogg.enable(process.env.LOGGFATHER);

Global Defaults

SnoopLogg allows you to set defaults using environment variables that apply to all SnoopLogg instances.

• SNOOPLOGG_COLOR_LIST - A comma-separated list of supported color names.
• SNOOPLOGG_DEFAULT_THEME - Sets the theme.
• SNOOPLOGG_MAX_BUFFER_SIZE - Sets the maxBufferSize.
• SNOOPLOGG_MAX_BRIGHTNESS - Sets the maxBrightness.
• SNOOPLOGG_MIN_BRIGHTNESS - Sets the minBrightness.

License

MIT