Min-log NPM | npm.io

min-log

browser_console

Better Logger with Custom Level and Outputer Taking over the original console

Support All Browsers which can Display on page or in Console, for Phone and old IE debugging, support wechat miniprogram

npm i min-log

var log = require('min-log')

log.debug('hello')

If you already has a project with console.log, just add a plugin to webpack config

then min-log will take over all consoles and hide all logs by default

plugins: [
  new webpack.ProvidePlugin({
    console: 'min-log'
  })
]

If want have logger with namespace

e.g. animal.js, use filename as log namespace to take over console

const console = require('min-log').getLogger('animal')

debug with namespace like package name

var log = require('min-log').getLogger('com:foo')

log.debug('this file log')

var log = require('min-log')
if (log.isDebugEnabled()) {
  doSomeMockThing()
}

min-log default enable history, default history size is 3000

Set Level

log.setLevel('debug') // set debug level

Level	Description
`verbose`	Detail and verbose debug log only developper cares
`debug`	Debug log only developper cares
`info`	Normal info user should care like login or logout
`warn`	Some waring user should care like cookie expired
`error`	Some serious error user should care like server return error
`fatal`	Some fatal error which will crash the program

Set Outputer

log.setOutputer('browser_color') // set browser color outputer

Outputer	Usage
`console`	Simple console output like `console.log`
`node_console`	Print log with color in node
`browser_console`	Print log with color in browser
`browser_html`	Print log in document by html (for old IE or phone website)
`vconsole`	Remote call vConsole to print log
`eruda`	Remote call Eruda to print log

If you like tj@debug and just use debug level, you can do this

var debug = require('min-log/debug')('http')

debug('booting')

You can set log config for min-log

Name	Purpose
`log_name`	Enables/disables specific debugging namespaces
`log_level`	Set log level like `debug`
`log_outputer`	Set outputer like `browser_html`

min-log will try to get user config from three ways in order

Query in page url e.g. my.site.com/path?log_name=*&log_level=debug&log_output=browser_html
localStorage e.g. localStorage.log_level = debug
Environment e.g. log_level=debug log_name=main* node app.js

set log colors

log.setColors(['#f8f8f2', 'goldenrod', '#66d9ef', '#a6e22e', '#e6db74', '#f92672'])

set log namespace prefix

log.setPrefix('com:company:')

TODO

Formatter	Representation
`%O`	Pretty-print an Object on multiple lines
`%o`	Pretty-print an Object all on a single line
`%s`	String
`%d`	Number
`%j`	JSON
`%%`	Single percent sign ('%'). This does not consume an argument