now-deployment/node_modules/tracer/example/multipleTransport.js

/**
 * Created by Amit Thakkar on 10/9/15.
 */
"use strict";
(function (require) {
    var fs = require('fs');
    var logger = require('tracer').console({
        transport: [
            function (data) {
                fs.open('./file.log', 'a', parseInt('0644', 8), function (e, id) {
                    fs.write(id, data.output + "\n", null, 'utf8', function () {
                        fs.close(id, function () {
                        });
                    });
                });
            },
            function(data) {
                console.log(data.output);
            }
        ]
    });
    logger.log('hello');
    logger.trace('hello', 'world');
    logger.debug('hello %s', 'world', 123);
    logger.info('hello %s %d', 'world', 123, {foo: 'bar'});
    logger.warn('hello %s %d %j', 'world', 123, {foo: 'bar'});
    logger.error('hello %s %d %j', 'world', 123, {foo: 'bar'}, [1, 2, 3, 4], Object);
})(require);