@matrixai/logger

js-logger

This library provies a JavaScript logger that is similar to the Python logger.

Installation

npm install --save @matrixai/logger

Usage

Hierarchical Loggers

Generate sub-loggers for different domains of a project

import Logger from '@matrixai/js-logger'

const logger = new Logger();

const subLogger = logger.getLogger('scope');

Parents and childs of loggers can be gotten

const subLogger = logger.getChild('scope');

const newLogger = subLogger.getParent();

Message types

Can log 4 different types of messages

logger.debug('output');

logger.info('output');

logger.warn('output');

logger.error('output');

Can set the level of loggers to control the verbosity

logger.setLevel(3);

# These will not be logged
logger.debug('output');
logger.info('output');

# These will be logged
logger.warn('output');
logger.error('output');

Development

Run nix-shell, and once you're inside, you can use:

# install (or reinstall packages from package.json)
npm install
# build the dist
npm run build
# run the repl (this allows you to import from ./src)
npm run ts-node
# run the tests
npm run test
# lint the source code
npm run lint
# automatically fix the source
npm run lintfix

Publishing

# npm login
npm version patch # major/minor/patch
npm run build
npm publish --access public
git push
git push --tags