node-trailer

A logger built with middleware, based on trough.

• Create a logger without middlewares will use the default theme;
• Create a customize logger with middlewares.
  • There are 3 types middleware:
    • Filter decide what can be handle by next middleware;
    • Appender render different part of message as a log;
    • Output use appenders generating the log and send it to different place.

Installation

Install using npm:

npm i -P node-trailer

Usage

Basic usage:

import createLogger from "node-trailer"

const logger = createLogger({ level: 'info' })
logger.log('log message.') // No output
logger.info('info message.') //=> info message.

Customize:

const pipeline = trough()
  // Filter
  .use(filter(({ options, level }: LoggerContext) =>
    levelWeight[options.level] <= levelWeight[level]
  ))
  // Appender
  .use(level(levelColor))
  .use(message())
  .use(error())
  // Output
  .use(colorConsole())

const logger = createLogger({}, pipeline)

API Reference

• node-trailer
  • inner
    • createLogger()
    • :Middleware
      • filter()
      • :Appender
        • date()
        • level()
        • message()
        • position()
      • :Output
        • rawConsole()
        • colorConsole()
        • logFile()
        • jsonFile()

Tests

Run tests using npm test.

Contributing

Please submit all issues and pull requests to the plylrnsdy/node-trailer repository!

Support

If you have any problem or suggestion please open an issue here.