codemilli

class Person {
    constructor(firstName, lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    hello () {
        console.log(`My name is ${this.firstName} ${this.lastName}`);
    }
}

codemilli

class Developer extends Person {
    constructor (firstName, lastName, role) {
        super(firstName, lastName);
        this.role = role;
    }

    hello () {
        console.log(`My name is ${this.firstName} ${this.lastName} and I am a ${this.role}`);
    }
    

codemilli

function listen(element, eventName) {
    return new Observable(observer => {
        // Create an event handler which sends data to the sink
        let handler = event => observer.next(event);

        // Attach the event handler
        element.addEventListener(eventName, handler, true);

        // Return a function which will cancel the event stream
        return () => {

codemilli

var btn = document.getElementById('button');

btn.addEventListener('click', function () {
  console.log('Hello, Universe');
});

codemilli

var arr = [1, 2, 3, 4, 5, 6];

var filteredArr = arr.filter(function(item) {
  return item % 2 === 0;
}); 

var mappedFilteredArr = filteredArr.map(function (item) {
  return item * 2;  
});

codemilli

el.addEventListener('scroll', function () {
  if (pageYOffset !== 0) {
    realCallback();
  }
});

el.addEventListener('touchmove', function () {
  if (pageYOffset !== 0) {
    realCallback();
  }

codemilli

var btn = document.getElementById('button');

btn.addEventListener('click', function () {
  if (window.__VALID_USER__) {
    console.log('Hello, Universe'); 
  }
});

codemilli

{"answers":["function(console) {\n\tvar names = [\"Ben\", \"Jafar\", \"Matt\", \"Priya\", \"Brian\"],\n\t\tcounter;\n\n\tfor(counter = 0; counter < names.length; counter++) {\n\t\tconsole.log(names[counter]);\n\t}\n}\n\t\t","function(console) {\n\tvar names = [\"Ben\", \"Jafar\", \"Matt\", \"Priya\", \"Brian\"];\n\n\tnames.forEach(function(name) {\n\t\tconsole.log(name);\n\t});\n}\n\t\t","function() {\n\tvar newReleases = [\n\t\t{\n\t\t\t\"id\": 70111470,\n\t\t\t\"title\": \"Die Hard\",\n\t\t\t\"boxart\": \"http://cdn-0.nflximg.com/images/2891/DieHard.jpg\",\n\t\t\t\"uri\": \"http://api.netflix.com/catalog/titles/movies/70111470\",\n\t\t\t\"rating\": [4.0],\n\t\t\t\"bookmark\": []\n\t\t},\n\t\t{\n\t\t\t\"id\": 654356453,\n\t\t\t\"title\": \"Bad Boys\",\n\t\t\t\"boxart\": \"http://cdn-0.nflximg.com/images/2891/BadBoys.jpg\",\n\t\t\t\"uri\": \"http://api.netflix.com/catalog/titles/movies/70111470\",\n\t\t\t\"rating\": [5.0],\n\t\t\t\"bookmark\": [{ id: 432534, time: 65876586 }]\n\t\t},\n\t\t{\n\t\t\t\"id\": 654

codemilli

el.addEventListener('scrollWhenScrollNotAtTop', realCallback);
$.ajax('http://get-user-info.com').ifUserDidPay(showSomethingColl);

codemilli

$.get('http://get-user-info.com').then(function(user) {
  if (user.didPay) {
    showSomethingCool();
  }
});