Since NPM v7.x, you can use the peerDependenciesMeta package.json config, which allows exactly that option. For example, in your “Module A” package.json: “peerDependencies”: { “winston”: “> 1.0.0 <= 1.2.10”, “foo”: “~2.3.0” }, “peerDependenciesMeta”: { “winston”: { “optional”: true } } In this case, when installing Module A as a dependency of another project, it will … Read more
If you are using the default logger, you can adjust the log levels like this: const winston = require(‘winston’); // … winston.level=”debug”; will set the log level to ‘debug’. (Tested with winston 0.7.3, default logger is still around in 3.2.1). However, the documentation recommends creating a new logger with the appropriate log levels and then … Read more
You are trying to insert a JSON object directly into the string, so it will print [Object Object] without the JSON.stringify. This is not fixable by configuring Winston, as this problem happens while the string is generated (before the logger.debug function actually reads it), so a console.log call would print the same thing. The first … Read more
The timestamp option can be a function that returns what you wish it to be saved as… Line 4: winston.add(winston.transports.Console, {‘timestamp’:function() {return ‘111111111’; },’colorize’:true}); Source here: https://github.com/flatiron/winston/pull/120
As per the documentation, you can set your own Logging levels, 0 being lowest, and associate colours with it. Now, if you don’t want to log the lowest level, just set the level property to the corresponding level. By default, the console logger has it’s level set to info So, here is an example: logger … Read more
winston 3.x (current version) Default formatter const winston = require(‘winston’); const logger = winston.createLogger({ format: winston.format.json(), transports: [ new winston.transports.Console() ] }); Example const test = { t: ‘test’, array: [1, 2, 3] }; logger.info(‘your message’, test); // logger output: // {“t”:”test”,”array”:[1,2,3],”level”:”info”,”message”:”your message”} Custom formatter const winston = require(‘winston’); const { splat, combine, timestamp, printf … Read more
I think what you’re missing is format.errors({ stack: true }) in winston.createLogger. const logger = winston.createLogger({ level: ‘debug’, format: format.combine( format.errors({ stack: true }), print, ), transports: [new transports.Console()], }); See this GitHub thread for more information. The reason this is happening is because the interesting Error object properties, like .stack, are non-enumerable. Some functions … Read more
I figured out the answer (the documentation is incorrect). If you use the constructor, and manually add transports, you can set options, both for winston, and for individual transports. Certain options need to be added to winston directly, while others need to be added to the transport. E.g.: var winston = require(‘winston’); var logger = … Read more
logger.log(“info”, “Starting up with config %j”, config); Winstons uses the built-in utils.format library. https://nodejs.org/dist/latest/docs/api/util.html#util_util_format_format_args
Simply set the file transport “json” property to false, and you’ll get a human readable log. Same as you see in the console. var winston = require(‘winston’); var logger = new winston.Logger({ transports: [ new winston.transports.File({ json: false, filename:’log.log’ }), new winston.transports.Console() ], exitOnError: false }); logger.log(‘info’, ‘some msg’);