Rslog

A tiny, intuitive, type-friendly logger for Node.js.

• Tiny. 2kB gzipped.
• Clean. Zero dependencies.
• Intuitive. Clear log prefix.
• Type-friendly. Written in TypeScript.

Preview

Install

 # with npm
npm add rslog

# with yarn
yarn add rslog

# with pnpm
pnpm add rslog

# with bun
bun add rslog

Usage

• Require:

 // with require
const { logger } = require('rslog');

// with import
import { logger } from 'rslog';

• Log:

 // A gradient welcome log
logger.greet(`\n➜ Rslog v1.0.0\n`);

// Info
logger.info('This is a info message');

// Start
logger.start('This is a start message');

// Warn
logger.warn('This is a warn message');

// Ready
logger.ready('This is a ready message');

// Success
logger.success('This is a success message');

// Error
logger.error('This is a error message');
logger.error(new Error('This is a error message with stack'));

// Debug
logger.debug('This is a debug message');

// Same as console.log
logger.log('This is a log message');

Log Level

You can create a new logger instance through createLogger and specify the log level:

 import { createLogger } from 'rslog';

const logger = createLogger({ level: 'warn' });

// Will print
logger.error('This is a error message');
logger.warn('This is a warn message');

// Will not print
logger.info('This is a info message');
logger.log('This is a log message');

You can also directly modify the level attribute of the logger instance:

 logger.level = 'verbose';

The log levels of each method are as follows:

Override

You can use logger.override to override some or all methods of the default logger.

 import { logger } from 'rslog';

logger.override({
  log: message => {
    console.log(`[LOG] ${message}`);
  },
  info: message => {
    console.log(`[INFO] ${message}`);
  },
  warn: message => {
    console.log(`[WARN] ${message}`);
  },
  error: message => {
    console.log(`[ERROR] ${message}`);
  },
});

Environment

Rslog provides both CommonJS and ESModule output and supports Node.js >= 14.

Credits

Rslog is built with Modern.js.

The color implementation of Rslog are modified from alexeyraspopov/picocolors.

License

Rslog is MIT licensed.