How i should change this log4js

Question

How i should change this :

log4js.configure({
    appenders: [
        { type: 'console' },
        { type: 'file', filename: 'logs/site.log' }
    ]
});

---

Because i get this error that:

Error: Problem with log4js configuration: ({ appenders:
   [ { type: 'console' },
     { type: 'file', filename: 'logs/site.log' } ] }) - must have a property "appenders" of type object.

Answer 1

appenders should be a plain object, providing each appender as a value for a given name (the key):

log4js.configure({
    appenders: {
        con: { type: 'console' },
        fil: { type: 'file', filename: 'logs/site.log' }
    }
});

An appender is then referenced by name, like so:

log4js.getLogger('con');

See also the documentation.