Overwrite System Logs

Library with functionality that overwrites all console methods to give a more precise format. Configuration based on winston dependency.

How to use

overwrite-system-logs-tests
├── package.json
└── src
    ├── index.js
    └── index.ts

// src/index.js
require('overwrite-system-logs').overwriteSystemLogs();

const logsTest = () => {
    const helloWorld = 'hello world from overwrite-system-logs';
    console.log({ helloWorld });
    console.log('Test message');
};

logsTest();

// src/index.ts
import { overwriteSystemLogs } from 'overwrite-system-logs';

overwriteSystemLogs();

const logsTest = (): void => {
    const helloWorld: string = 'hello world from overwrite-system-logs';
    console.log({ helloWorld });
    console.log('Test message');
};

logsTest();

Output:

2021-12-15T15:34:47.433Z INFO [ src/index.js 5:5 | object ]: {"helloWorld":"hello world from overwrite-system-logs"}
2021-12-15T15:34:47.434Z INFO [ src/index.js 6:5 | string ]: Test message

2021-12-15T15:34:50.065Z INFO [ src/index.ts 7:5 | object ]: {"helloWorld":"hello world from overwrite-system-logs"}
2021-12-15T15:34:50.066Z INFO [ src/index.ts 8:5 | string ]: Test message

Log output elements and structure

<dateToISOString> <INFO|WARN|ERROR> [ <folder/file{.js|.ts}> <line>:<position> ]: <mensaje>

Configuration

It is necessary to provide an environment variable called LOG_LEVEL and assign it a value, in case it is not defined, the library takes by default the level of log info

Log levels:

• error
• warn
• info
• debug

Ordered from most important to least important. If the value defined in LOG_LEVEL is none of these, an exception will be thrown.

If you want the objects to have a pretty-print, just provide another environment variable called LOG_PRETTY that represents the space argument. see documentation

Dependencias

This logger works using as dependency the Winston library link