@vitalets/logger

Pure typescript logger with support of prefix, levels, time measure and debug buffering.

Features

• prefix
• log levels
• time measure
• buffering debug messages

Usage

import { Logger } from '@vitalets/logger';

// create logger with prefix and level
const logger = new Logger({ prefix: '[db]:', level: 'info' });

// log as usual
logger.debug(42);
logger.log(42);
logger.info(42);
logger.warn(42);
logger.error(42);

// measure time
const result = await logger.logTime('fetching...',
  () => fetch('http://example.com')
);
// OUTPUT:
// 'fetching...'
// 'fetching... (1.234s)'

// buffer debug messages
try {
  logger.debug('hello'); // -> outputs nothing as level=info, but stores message in logger.debugBuffer
  throw new Error('my error');
} catch (e) {
  throw logger.flushDebugBufferToError(e); // attaches debug messages to error stack
}

Installation

npm i @vitalets/logger

Note: this package is ESM only

API

tbd

License

MIT @ Vitaliy Potapov