JS Logger

Purpose

Defines a standard for logging.

Should make logging easier and safer:

• Output is in json format by default (can be overridden)
• Timestamp is added by default (current time) (can be overridden)
• Console output is colorized and formatted by default (can be disabled)

Winston Based

The module enables the creation of an altered version of a winston logger. Some of the functionality has been saved and some has been removed for the purpose of not making life complicated and maintaining a unified way of logging.

Transports

All functionality for transports is preserved as it is in Winston.

Levels

Functionality for levels is predefined and cannot be changed for the purpose of defining a standard of logging.

Basic Usage

const logger = createLogger()
logger.log('info', 'test message')
logger.log({level: 'info', message: 'test message'})
logger.log({level: 'info', someOtherKey: 'value'})
logger.log('info', {someOtherKey: 'value'})
logger.log('info', 'test message', {key: 'value'})

• By default, all logs are logged in json format unless the format is changed in the transport
• All of the uses above are supported
• Has a default console transport, can be disabled

const logger = createLogger();
logger.info('test message')
logger.info({someKey: 'value'})
--------
logger.debug
logger.error
logger.silly
logger.verbose

• Functionality for .info is the same as .log except we dont need to specify the level
• All levels above are available with the same syntax, only difference is the level of the log

Example: Setting up logger for logs service

import {createLogger, HttpTransport} from "@stamscope/jslogger";
const loggerOptions = {
    transports: [
        new HttpTransport('http://some-other-host:3000/api/v1/test'),
        new HttpTransport({
            host: 'localhost',
            port: 3000,
            path: '/api/v1/test',
            ssl: true
        })
    ]
};
const logger = createLogger(loggerOptions);
logger.error('Something has failed')

The logger above will send logs to the following places:

• To the console (by default)
• to http://some-other-host:3000/api/v1/test (defined in the first transport)
• to https://localhost:3000/api/v1/test (defined in the second transport)