This is a NodeJs Module, it can be installed through the npm registry.
To install use the following command in your root directory.
$ npm install @alpler/logger
This is a simple logger for NodeJs. It will generate to log Files in which messages can be logged. errors.log Will only include messages with a level higher than WARN log.log Will include all messages above the before set Log Level
Simple example of how use it
JavaScript:
const logger = require("@alpler/logger");
logger.setLogLevel(logger.LogLevel.INFO);
logger.log(logger.LogLevel.ERROR, "example.js:5", "There is no code left to execute :(");
TypeScript:
import * as logger from "@alpler/logger"
logger.setLogLevel(logger.LogLevel.INFO)
logger.log(logger.LogLevel.ERROR, "example.ts:3", "There is no code left to execute :( ")
OUTPUT:
[21.02.2022] [01:08] ERROR example.ts:3 There is no code left to execute :(
Each Log Level describes the different importance of a message.
In the version 1.2.4 there are six different Log levels these are
| Name | Value | Description |
|---|---|---|
| FATAL | 5000 | Servere errors that might cause a crash |
| ERROR | 4000 | Erros which may prevent normal execution of the program |
| WARN | 3000 | Potential problems which could also just be nothing |
| INFO | 2000 | Information about the progress of the program |
| DEBUG | 1000 | Detailed tracing messages for the progress of the program |
| ALL | 0 | All that could you ever want to log |
Typescript:
logger.setLogLevel(logger.LogLevel.INFO)
JavaScript:
logger.setLogLevel(logger.LogLevel.INFO)
This will set the Level at which the logger will start writing it into the log.log and also the console
Typescript:
logger.log(logger.LogLevel.ERROR, "example.ts:3", "There is no code left to execute :(")
JavaScript:
logger.log(logger.LogLevel.ERROR, "example.js:5", "There is no code left to execute :(")
In this Case we pass a Log Level with a message so the logger can check if the message should be logged.