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                  <form class="search-form">
    <input type="text" class="search" placeholder="City or State">
    <ul class="suggestions">
      <li>Filter for a city</li>
      <li>or a state</li>

  <p class="love">Using JavaScript, replicate the <a href="" target="_blank">functionality found here</a>. <br>I'll post my answer once everyone has had a shot. <br>Tweet your answer <a href="">@wesbos</a></p>


                    html {
      box-sizing: border-box;
      background: #ffc600;
      font-family: 'helvetica neue';
      font-size: 20px;
      font-weight: 200;
    *:after {
      box-sizing: inherit;
    input {
      width: 100%;
      padding: 20px;
    .search-form {
      max-width: 400px;
      margin: 50px auto;
    } {
      margin: 0;
      text-align: center;
      outline: 0;
      border: 0;
      border: 10px solid #F7F7F7;
      width: 120%;
      left: -10%;
      position: relative;
      top: 10px;
      z-index: 2;
      border-radius: 5px;
      font-size: 40px;
      box-shadow: 0 0 5px rgba(0, 0, 0, 0.12), inset 0 0 2px rgba(0, 0, 0, 0.19);
    .suggestions {
      margin: 0;
      padding: 0;
      position: relative;
    .suggestions li {
      background: white;
      list-style: none;
      border-bottom: 1px solid #D8D8D8;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.14);
      margin: 0;
      padding: 20px;
      transition: background 0.2s;
      display: flex;
      justify-content: space-between;
      text-transform: capitalize;
    .suggestions li:nth-child(even) {
      transform: perspective(100px) rotateX(3deg) translateY(2px) scale(1.001);
      background: linear-gradient(to bottom, #ffffff 0%, #EFEFEF 100%);
    .suggestions li:nth-child(odd) {
      transform: perspective(100px) rotateX(-3deg) translateY(3px);
      background: linear-gradient(to top, #ffffff 0%, #EFEFEF 100%);
    span.population {
      font-size: 15px;
    .details {
      text-align: center;
      font-size: 15px;
    .hl {
      background: #ffc600;
    .love {
      text-align: center;
      line-height: 2;
    a {
      color: black;
      background: rgba(0, 0, 0, 0.1);
      text-decoration: none;


                // Fetch the top 1000 US cities by population json from this url and create a typeahead to filter by city or state name

// each city should be a <li> in the suggestions <ul>

// there is a span class of `hl` to highlight matches

// Demo:

var url = '';

// Good luck! 

//get the search box
var search = document.querySelector(".search");
//get the list
var list = document.querySelector(".suggestions");
//initialize a variable to hold the data
var data = [];
//start an HTTP request
var xmlhttp = new XMLHttpRequest();

//make the HTTP request"GET", url, true);
xmlhttp.onreadystatechange = function() {
  if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
    data = JSON.parse(xmlhttp.responseText);

//when a key is pressed
search.addEventListener('keyup', function() {
  //create a new regex
  var myExp = new RegExp(search.value, 'gi');
  //create a new output variable
  var output = '';
  //if the search box is emptied
  if(search.value === '') {
    //remove all list items
    list.innerHTML = '';
  } else {
    //loop through the data
    for(var key in data) {
      //if the city or state matches
      if((data[key] != -1) || (data[key] != -1)) {
        //apend a new list item containing the location info to the output string variable
        output += '<li><span>' + data[key].city.replace(myExp, function(str) {
        return '<span class="hl">'+str+'</span>'}) + ', ' + 
          data[key].state.replace(myExp, function(str) {
        return '<span class="hl">'+str+'</span>'}) + '</span><span class="population">' + 
          data[key].population +'</span></li>';
      } //end if
    } //end for
    //put the contents of the output variable into the list
    list.innerHTML = output;
  } //end else
}); //end searchList