Introduction to Jazzy Logger

Welcome to the comprehensive guide to jazzy-logger, an innovative logging library designed to simplify and enhance your logging system. This guide covers dozens of useful APIs with practical code snippets to help you get started.

Getting Started with Jazzy Logger

To begin using jazzy-logger, you need to install it:

npm install jazzy-logger

Basic APIs

Here are some basic APIs of jazzy-logger:

1. Initialize Logger

const logger = require('jazzy-logger')();

2. Log Information

logger.info('This is an info message');

3. Log Warnings

logger.warn('This is a warning message');

4. Log Errors

logger.error('This is an error message');

Advanced APIs

Explore advanced functionalities of jazzy-logger:

5. Set Log Level

logger.setLevel('debug');
logger.debug('This is a debug message');

6. Customize Timestamp Format

logger.setTimestampFormat('YYYY-MM-DD HH:mm:ss');
logger.info('This message has a custom timestamp format');

7. Use Contextual Logging

logger.context({ userId: 123 }).info('User login event');

8. Add Custom Transports

const customTransport = (log) => { saveToDatabase(log); };
logger.addTransport(customTransport);
logger.info('This log will be saved to database');

App Example

Here’s an example of a simple app using jazzy-logger APIs:

const express = require('express');
const logger = require('jazzy-logger')();

const app = express();

app.use((req, res, next) => {
  logger.info(`Request received: ${req.method} ${req.url}`);
  next();
});

app.get('/', (req, res) => {
  logger.info('Handling root route');
  res.send('Hello, world!');
});

app.use((err, req, res, next) => {
  logger.error(`Error encountered: ${err.message}`);
  res.status(500).send('Internal Server Error');
});

app.listen(3000, () => {
  logger.info('Server is running on port 3000');
});

By incorporating jazzy-logger into your application, you can streamline logging and make error detection more effective.

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