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    node-json-logger
    DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/node-json-logger package

    0.0.17 • Public • Published

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    node-json-logger

    Simply, output logs to STDOUT in JSON

    Install

    npm i node-json-logger

    Usage

    const Logger = require('node-json-logger');
    const logger = new Logger();
    
    logger.info();
    logger.info('message');
    logger.info('message','message','message');
    logger.info({ data: 'data' });
    logger.info({ data1: 'data' }, { data2: 'data' });
    logger.info('message', { data1: 'data' }, 'message', { data2: 'data' }, 'message');

    Outputs:

    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","message":"message"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","message":"message","message1":"message","message2":"message"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","data":"data"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","data1":"data","data2":"data"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","message":"message","data1":"data","message1":"message","data2":"data","message2":"message"}

    API

    logger.xxx(message?, ...)

    Note:

    Arguments:

    • message: Specify a message as string or object.

    Levels

    • trace
    • debug
    • info
    • warn
    • error
    • fatal

    Configuration

    level

    Specify output level. (optional, default is debug)

    const Logger = require('node-json-logger');
    const logger = new Logger({ level: 'error'});
    
    logger.trace('message');
    logger.debug('message');
    logger.info('message');
    logger.warn('message');
    logger.error('message');
    logger.fatal('message');

    Output:

    {"timestamp":"2001-03-14T01:00:00.000Z","level":"error","message":"message"}
    {"timestamp":"2001-03-14T01:00:00.000Z","level":"fatal","message":"message"}

    Level and output:

    trace debug info warn error fatal
    { level: 'trace' } O O O O O O
    { level: 'debug' } - O O O O O
    { level: 'info' } - - O O O O
    { level: 'warn' } - - - O O O
    { level: 'error' } - - - - O O
    { level: 'fatal' } - - - - - O
    { level: 'none' } - - - - - -

    loggerName

    Specify the name of the logger. Useful when logging from different files.

    const Logger = require('node-json-logger');
    const logger = new Logger({ loggerName: 'server/index.js' });
    
    logger.info('message');

    Output:

    {"timestamp":"2001-03-14T01:00:00.000Z","level":"info","loggerName":"server/index.js","message":"message"}

    timestamp

    Specify enable or disable timestamp. (optional, default is true)

    const Logger = require('node-json-logger');
    const logger = new Logger({ timestamp: false });
    
    logger.info('message');

    Output with disabled timestamp:

    {"level":"info","message":"message"}

    timezone

    Specify locale timezone. (optional, default is UTC)

    const Logger = require('node-json-logger');
    const logger = new Logger({timezone: 'America/Sao_Paulo'});
    
    logger.info('message');

    Output with specific timezone:

    {"timestamp":"2018-10-25T15:32:43.318Z","level":"info","message":"message"}

    Same output with default timezone (UTC):

    {"timestamp":"2018-10-25T18:32:43.318Z","level":"info","message":"message"}

    Click here to see the list with all available timezones.

    License

    MIT

    Copyright ©2018 Hiroaki SHIBUKI a.k.a. hidori

    Keywords

    Install

    npm i node-json-logger

    DownloadsWeekly Downloads

    805

    Version

    0.0.17

    License

    MIT

    Unpacked Size

    17 kB

    Total Files

    16

    Last publish

    Collaborators

    • hidori