Can someone just help me understand!

const wifi = require("Wifi");

const ssid = "";
const password = "";


wifi.connect(ssid, {password:password}, function(e) {
  if (e) {
    console.log('error during connect:',e);
    wifi.disconnect();
  } else {
    console.log('connected to',ssid);
    require("Wifi").getIP((err, ipinfo) => {console.log(ipinfo)});
    wifi.stopAP();
    //wifi.save();
  }
});



const sensor = require("HC-SR04").connect(NodeMCU.D1,No­deMCU.D2,function(dist) {
      const inches = dist * 0.393701;
      n = inches.toFixed(2);
      console.log(n);

     
setInterval(function() {
        sensor.trigger(); // send pulse
}, 10000);


function postMe() {
  content = "Hello";
  var options = {
    host: 'whatdoIputhereifIamrunningalocalserverw­ithexpress',
    port: '80',
    path:'/',
    method:'POST',
    headers: {
      "Content-Type":"application/json",
      "Content-Length":content.length
    }
  };
  require("http").request(options, function(res)  {
    // ...
  }).end(content);
}

This is pretty much as far As I've gotten with my code.. I tried to do a test post with no luck so far