Welcome to the Comprehensive Guide to Ink Logger API

The Ink Logger is a powerful and flexible logging library designed for robustness and ease of use. This guide introduces the Ink Logger and provides numerous examples of its API to help developers effectively integrate it into their applications.

Getting Started with Ink Logger

To start using Ink Logger, install it via npm:

  npm install ink-logger

Next, import and configure your logger instance:

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

  logger.configure({
    level: 'info',
    transports: [
      new logger.transports.Console(),
      new logger.transports.File({ filename: 'app.log' })
    ]
  });

Basic Logging Methods

Use the following methods for basic logging:

• logger.info(message): Log an informational message
• logger.warn(message): Log a warning message
• logger.error(message): Log an error message
• logger.debug(message): Log a debug message

Example:

  logger.info('This is an info message');
  logger.warn('This is a warning message');
  logger.error('This is an error message');
  logger.debug('This is a debug message');

Advanced Features

Ink Logger offers advanced features such as:

• Custom Transports: Create custom transports to log messages to various destinations.
• Formatters: Format log messages with custom timestamp, metadata, and more.
• Levels: Define custom logging levels beyond the defaults.
• Filters: Filter log messages before they are sent to the transports.

Example of a custom transport:

  class CustomTransport extends logger.Transport {
    log(info, callback) {
      // Implement custom logging logic here
      console.log(`Custom: ${info.message}`);
      callback();
    }
  }

  logger.add(new CustomTransport());

Example of a custom formatter:

  const { format } = logger;

  logger.configure({
    format: format.combine(
      format.timestamp(),
      format.printf(({ level, message, timestamp }) => {
        return `${timestamp} [${level}]: ${message}`;
      })
    )
  });

Example App Integration

Below is an example of integrating Ink Logger into a simple Express.js application:

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

  logger.configure({
    level: 'info',
    transports: [
      new logger.transports.Console(),
      new logger.transports.File({ filename: 'app.log' })
    ]
  });

  const app = express();

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

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

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

With this setup, all HTTP requests will be logged to the console and the app.log file.

Make sure to explore the Ink Logger documentation for more details on available features and customization options.

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