Скачать или смотреть pino js logging in javascript node js applications

Download 1M+ code from https://codegive.com/26a0ddf
sure! pino is a very fast json logger for node.js applications. it is designed to be simple, efficient, and to produce structured logs that can easily be consumed by various log management tools.

getting started with pino

step 1: install pino

first, you need to install pino in your node.js application. you can do this using npm or yarn.

```bash
npm install pino
```

or

```bash
yarn add pino
```

step 2: basic usage

create a simple logger in your application. below is a basic example of how to set up pino and log some messages.

```javascript
// logger.js
const pino = require('pino');

// create a logger instance
const logger = pino({
level: 'info', // set the log level
transport: {
target: 'pino-pretty', // use pino-pretty for development
options: {
colorize: true, // colorize the output
},
},
});

// export the logger instance
module.exports = logger;
```

step 3: using the logger

now that you have set up your logger, you can use it in your application. here’s an example of how to use the logger in an express application.

```javascript
// app.js
const express = require('express');
const logger = require('./logger'); // import the logger

const app = express();
const port = 3000;

// middleware to log requests
app.use((req, res, next) = {
logger.info({ req }, 'incoming request');
next();
});

// example route
app.get('/', (req, res) = {
logger.info('hello world route accessed');
res.send('hello world!');
});

// start the server
app.listen(port, () = {
logger.info(`server is running on http://localhost:${port}`);
});
```

log levels

pino supports various log levels. here’s a quick overview:

`fatal`: 50 - very serious errors that may cause the application to crash.
`error`: 40 - runtime errors or unexpected conditions.
`warn`: 30 - potentially harmful situations.
`info`: 20 - informational messages that highlight the progress of the application.
`debug`: 10 - fine-grained informational events that are usef ...

#PinoJS #NodeJSLogging #numpy
Pino
logging
Node.js
JavaScript
performance logging
structured logging
asynchronous logging
JSON logging
lightweight logger
log levels
error handling
log management
application monitoring
real-time logging
logging middleware