callback example

callback.js

// global variable
var allUserData = [];

function logStuff (userData) {
    console.log('22222222');
    if ( typeof userData === "string")
    {
        console.log(userData);
    }
    else if ( typeof userData === "object")
    {
        for (var item in userData) {
            console.log(item + ": " + userData[item]);
        }

    }
    console.log('3333333');
}

function getInput (options, callback) {
    console.log('11111111111');
    allUserData.push (options);
    callback (options);
}

getInput ({name:"Rich", speciality:"JavaScript"}, logStuff);