This is a very simple and beautiful logger

logger.js

'use strict';

var RESET = '';
var SAFE = '';
var WARN = '';
var ERROR = '';
var VERBOSE = '';

const join = function(source, to) {
    for (const [key, value] of Object.entries(source))
        if (!(key in to))
            to[key] = value;
}

const overrides = {
    log: function() {
        console.log(...this._package_msg(SAFE, arguments));
        return this;
    },
    warn: function() {
        console.warn(...this._package_msg(WARN, arguments));
        return this;
    },
    error: function() {
        console.error(...this._package_msg(ERROR, arguments));
        return this;
    },
    verbose: function() {
        console.log(...this._package_msg(VERBOSE, arguments));
        return this;
    },
    _package_msg: function(color, args) {
        const prefix = color + this._sender + ' > ' + RESET;
        if (typeof args[0] === 'string') {
            args[0] = prefix + args[0];
            return args;
        } else {
            return [prefix, ...args];
        }
    },
    _sender: null
};

join(console, overrides);

module.exports = function(sender) {
    function Logger() {
        return Logger.log(...arguments);
    };

    join(overrides, Logger);
    Logger._sender = sender || 'Unknow';

    return Logger;

};

// call like normal

express_log.verbose('This is blue');
ws_log.verbose('This is also blue');

// lazy log

express_log.log('This is green');
express_log('This is also green'); // lazy log

// chain functions

express_log('This is green')
    .log('This is also green')
    .warn('This is yellow')
    .error('This is red');
ws_log('This is green')
    .log('This is also green')
    .warn('This is yellow');

// extends Console class functions

express_log().dir(express_log); // lazy log with no arg and .dir from Console
ws_log.log().dir(ws_log); // . log with no arg and .dir from Console

Code:

var logger = require('./logger')('Server');

logger('Hello');
logger.warn('This is a very simple logger');
logger.error('Oh no! I don\'t feel so good');

Result: