Freshlog NPM | npm.io

freshlog

simple nodejs logger

Log levels

* fatal   | unrecoverable error
* error   | unhandled error
* warn    | warning
* info    | startup status and notable events
  request | http and ws requests
  trace   | operational logging
  telem   | telemetry - performance and timing data
  diag    | system diagnostic info

*Enabled by default

Install

npm install freshlog

Usage

import { Log, Logger } from 'freshlog';

Log.info('start-server', {port: 8080});
// {"level": "info", "message": "start-server", "port": 8080, timestamp: "2018-09-15T08:27:32.465Z"}

// enable/disable log output
Log.handlers.get('diag').enabled = true;

// use middleware to add or modify data on each log
function pid(data) {
    data.pid = process.pid;
    return data;
}

// add middleware to all levels
Log.addMiddleware(pid, true);

// Add custom level
Log.addHandler('greetings', {
    middleware: [(data) => Object.assign(data, {message: message.toUpper(), greeter: 'elliot'})]
});

Log.log('greetings', 'hello');
// {"level": "greetings", "message": "Hello", "greeter": "elliot"}