jen-c
10/15/2017 - 6:44 PM

ajax - search ahead

from wes bos course javascript30.com

ajax-search-ahead.html
content_copyfile_download
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Type Ahead 👀</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>

  <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>
    </ul>
  </form>
<script>
const endpoint = 'https://gist.githubusercontent.com/Miserlou/c5cd8364bf9b2420bb29/raw/2bf258763cdddd704f8ffd3ea9a3e81d25e2c6f6/cities.json';
const cities = [];
fetch(endpoint)
  .then(blob => blob.json())
  .then(data => cities.push(...data));
function findMatches(wordToMatch, cities) {
  return cities.filter(place => {
    // here we need to figure out if the city or state matches what was searched
    const regex = new RegExp(wordToMatch, 'gi');
    return place.city.match(regex) || place.state.match(regex)
  });
}
function numberWithCommas(x) {
  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}
function displayMatches() {
  const matchArray = findMatches(this.value, cities);
  const html = matchArray.map(place => {
    const regex = new RegExp(this.value, 'gi');
    const cityName = place.city.replace(regex, `<span class="hl">${this.value}</span>`);
    const stateName = place.state.replace(regex, `<span class="hl">${this.value}</span>`);
    return `
      <li>
        <span class="name">${cityName}, ${stateName}</span>
        <span class="population">${numberWithCommas(place.population)}</span>
      </li>
    `;
  }).join('');
  suggestions.innerHTML = html;
}
const searchInput = document.querySelector('.search');
const suggestions = document.querySelector('.suggestions');
searchInput.addEventListener('change', displayMatches);
searchInput.addEventListener('keyup', displayMatches);
</script>
  </body>
</html>