node_modules/sntp/examples/offset.js

var Sntp = require('../lib');

// Request offset once

Sntp.offset(function (err, offset) {

    console.log(offset);                    // New (served fresh)

    // Request offset again

    Sntp.offset(function (err, offset) {

        console.log(offset);                // Identical (served from cache)
    });
});