Better debugging for chained functions (promises, streams, etc.). Inspired by supersniff, but with these improvements in mind:
- Support for custom loggers (like bunyan, winston, or other services)
- Pre- and suffix support
- No forced
tag
- Using error levels for errors
Things to do:
- Custom configureable log levels
- Decorator functions (e.g.
error => error.message
)
Can be found here. It shall be a readable replacement for:
getData()
.then(data => {
console.info(data)
return data
})
.then(transformData)
npm install megasniff
const megasniff = require('megasniff')
const reveersedList = new Promise(resolve => resolve([3, 1, 2]))
.then(megasniff)
.then(list => list.sort())
.then(megasniff)
.then(list => list.reverse())
.then(megasniff)
This yields in the console:
[ 3, 1, 2 ]
[ 1, 2, 3 ]
[ 3, 2, 1 ]
const megasniff = require('megasniff')
new Promise(resolve => resolve('Good'))
.then(megasniff.config({ suffix: `Value at ${new Date()}:` }))
This yields on stdout:
Good Value at Wed Oct 17 2018 15:47:26 GMT+0200 (Central European Summer Time)
const megasniff = require('megasniff')
const logger = console
new Promise((resolve, reject) => reject(new Error('Bad')))
.catch(megasniff.config({ suffix: '.. We are doomed' }))
.catch(error => error)
This yields on stderr:
Error: Bad ... We are doomed
const megasniff = require('megasniff')
const sortedList = new Promise(resolve => resolve([3, 1, 2]))
.then(megasniff)
.then(list => list.sort())
.then(megasniff)
megasniff
is a function that logs and returns the passed value.
The value is logged either to stdout or sterr depending on the passed value.
const megasniff = require('megasniff')
const logger = console
new Promise(resolve => resolve('Good Software'))
.then(megasniff.config({ prefix: `[megasniff]`, logger }))
megasniff.config
takes an object as argument.
Megasniff can be configured with these optional parameters:
key | value |
---|---|
log | External logger |
logger | Other key for external logger |
prefix | Will be prefixed the logged value |
suffix | Will be suffixed the logged value |