user defined function with callback in nodejs

Question

can anyone give me an example in which we are creating a particular function, which is also having a callback function ?

function login(username, password, funct         


        

Answer 1

Here's an example of the login function:

function login(username, password, callback) {
    var info = {user: username, pwd: password};
    request.post({url: "https://www.adomain.com/login", formData: info}, function(err, response) {
        callback(err, response);
    });
}

And calling the login function

login("bob", "wonderland", function(err, result)  {
    if (err) {
        // login did not succeed
    } else {
        // login successful
    }
});