Enable cross origin ( CORS ) in NodeJs

app.all('*', function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header("Access-Control-Allow-Headers", "X-Requested-With,X-Powered-By,Content-Type");
if (req.method === 'OPTIONS') {
res.status(200).end();
} else {
next();
}
});

How to Replace Object With Named Parameters in ES6 ( Error handing of undefined in JavaScript )

function loadProfiles(userNames = [],  {profilesClass, reverseSort} = {}) {
   profilesClass = profilesClass || ".user-profile";
   reverseSort   = reverseSort   || false;

  if (reverseSort) {
    userNames = _reverse(userNames);
  }

  _loadProfilesToSideBar(userNames, profilesClass);
}

Add Param middleware to fix dynamic routing in express

app.param('name', function (request, response, next) {

  request.cityName = parseCityName(request.params.name);

  next();

});

Create custom logger module in nodejs

create file name: logger.js

module.exports = function (request, response, next) {

  var startTime = +new Date();

  var stream = process.stdout;

  var duration = null;

  response.on('finish', function () {

    duration = +new Date() - startTime;

    stream.write("This request took " + duration + " ms" + request + " "+ response);

  });

  

  next();

};

// used to log  the request and response and duration 

Remove a git commit which has not pushed

git reset --hard origin/master