Loggr.js NPM | npm.io

loggr.js

A simple logging utility.

Usage
Installing
Example
loggr.js API
Roadmap
Credits
License

Usage

Used to log data to a write stream while also logging it to the console so that you can review now, and later.

Installing

npm i loggr.js

Example

const fs = require('fs');
const path = require('path');
const loggr = require('loggr.js');
const accessLog = fs.createWriteStream(path.join(__dirname, 'access.log'), { flags: 'a' });

... // Your code with an variable "data" that has some value.

// Default, will log to an event.log file.
loggr.log(data);

// Exprected result example:
// [mm/dd/yyyy @ hh:mm:ss:fff a] - value of data variable

// Normal, pass in a destination WriteStream.
loggr.log(accessLog, data); // Should output to access.log

// JSON
loggr.log(accessLog, data, 'json');

// Pretty printed JSON
loggr.log(accessLog, data, 'pretty');

// Have loggr.js create the log so you do not have to require fs and path
// separately.
loggr.create('trigger');

loggr.log('trigger', data); // Should output to /logs/trigger.log

// Have loggr.js recolor a log.
loggr.recolor.alert('\x1b[42m');

loggr.alert(data); // Should output a message with the severity notice using a
                   // green background to the console and the message to
                   // /logs/alert.log.

loggr.js API

Styling the console messages, potentially based on message severity, is possible using different logging helper functions.

Function	Severity	Style (BG/FG or FG)	Description
`loggr.emerg(data);`	Emergency (0)	Red/White	Process is unstable.
`loggr.alert(data);`	Alert (1)	Blue/White	Must take action immediately.
`loggr.crit(data);`	Critical (2)	Yellow	Process is in critical condition.
`loggr.err(data);`	Error (3)	Red	An error has occurred with process.
`loggr.warning(data);`	Warning (4)	Yellow/Black	An unexpected condition occurred with process.
`loggr.notice(data);`	Notice (5)	White	Other normal condition occurred with process.
`loggr.info(data);`	Informational (6)	Cyan	An informational message.
`loggr.debug(data);`	Debug (7)	Green/Black	Messages used for debugging.
`loggr.log(data);`	Default (8)	Default	Just a normal message.
`loggr.create(data);`	N/A	N/A	Creates 'data' log for future use.
`loggr.recolor.severity(data);`	N/A	N/A	Changes the color for the 'severity' notice for a non-default log type.

Note: With loggr.recolor.severity you need to change "severity" to the function name for the serverity type of log. For example, "Error" would be loggr.recolor.err().

Roadmap

Latest Feature

Automatically rotate logs everyday, i.e. logs/2018/04/11 (yyyy/mm/dd).

These are future capabilites that we intend to add:

In Progress

Allow for different timestamp formats.

Untouched

Timing
- Speed up logging.
Website
- Develop the landing page for the project.

Credits

loggr.js was inspired by the console.log(); functionality with the intention of adding a precise timestamp and preserving the logs for future reference. Rather than just logging to the console users should be able to log to any WriteStream they provide for enhancing their workflow such as an access.log, a transaction.log, a download.log, etc. Allowing users to easily log data to WriteStreams that make sense for their workflow. Another goal of the project is to help provide a mostly standardized approach to logging so that the logs can be easily consumed and parsed to find specific details. As with all things the final goal of the project is to help users save time so that they will "have more time" to allocate toward whatever they want.