wvly-logger

Install

npm install wvly-logger

Usage

//test.js
const  log  =  require("wvly-logger")();
log.error("error", new  Error("501"));
log.debug("DB Connected");

const  connectionString  =  "localhost:27017";
const  dbName  =  "countrySide";
const  nextObjectDetail  = {
name :  "Yaadhum Aanavan",
email :  "[e-mail]"
}

// Pass multiple data in info : Pass as Object
log.info("DB Connected: ", { connectionString, dbName,nextObjectDetail });
// Second Argument as Object : it supports nested Objects as well

Note :

Second Argument MUST be Object

log.info("DB Connected: ", {object});

Output in Console

NODE_ENV undefined
logLevel : undefined
{"@timestamp":"2023-06-19T14:31:25.673Z","log.level":"error","message":"error 501","ecs":{"version":"1.6.0"},"stack":"Error: 501\n    at Object.<anonymous> (/Users/muthuMathiyazhagan/Projects/Node/kibana/test.js:2:20)\n    at Module._compile (node:internal/modules/cjs/loader:1254:14)\n    at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)\n    at Module.load (node:internal/modules/cjs/loader:1117:32)\n    at Module._load (node:internal/modules/cjs/loader:958:12)\n    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)\n    at node:internal/main/run_main_module:23:47"}
{"@timestamp":"2023-06-19T14:31:25.674Z","log.level":"warn","message":"DB Connected","ecs":{"version":"1.6.0"}}
{"@timestamp":"2023-06-19T14:31:25.674Z","log.level":"info","message":"DB Connected: ","ecs":{"version":"1.6.0"},"connectionString":"localhost:27017","dbName":"countrySide","nextObjectDetail":{"name":"Yaadhum Aanavan","email":"[e-mail]"}}

Note :

Debug log (#3) not logged: As by default log level is 'info' if you want to change the Level you can pass log level as argument while require the package.

const log = require("wvly-logger")('debug');

Supported levels :

1. error
2. info
3. warn
4. debug

Features

By setting your env variable LOG_LEVEL you can change the overall log level :

Try in Terminal

export LOG_LEVEL=debug // for mac and Linux

set LOG_LEVEL=warn // for windows

Example to log your req and res of API in Route handler :

//routes/genres.js
const  express  =  require("express");
const  router  =  express.Router();

router.get("/", async (request, response) => {
log.info("Request and Response : ",{request,response});
return res.status(200).send('Hello Universe..!');
});
module.exports  =  router;

Note :

Pass request and request as Second argument as Object : { request , response } ..