example.js

// grab the Mixpanel factory
var Mixpanel = require('./lib/mixpanel-node');

// create an instance of the mixpanel client
var mixpanel = Mixpanel.init('962dbca1bbc54701d402c94d65b4a20e');
mixpanel.set_config({ debug: true });

// track an event with optional properties
mixpanel.track("my event", {
    distinct_id: "some unique client id",
    as: "many",
    properties: "as",
    you: "want"
});
mixpanel.track("played_game");

// create or update a user in Mixpanel Engage
mixpanel.people.set("billybob", {
    $first_name: "Billy",
    $last_name: "Bob",
    plan: "premium",
    games_played: 1,
    points: 0
});

// set a single property on a user
mixpanel.people.set("billybob", "plan", "free");

// increment a numeric property
mixpanel.people.increment("billybob", "games_played");

// increment a numeric property by a different amount
mixpanel.people.increment("billybob", "points", 15);

// increment multiple properties
mixpanel.people.increment("billybob", {"points": 10, "games_played": 1});

// delete a user
mixpanel.people.delete_user("billybob");

// all functions that send data to mixpanel take an optional
// callback as the last argument
mixpanel.track("test", function(err) { if (err) throw err; });