Implement type ahead functionality

dianafisher · dianafisher · commit 75b5b7843872 · 2016-12-16T16:08:15.000-08:00
diff --git a/06 - Type Ahead/.jshintrc b/06 - Type Ahead/.jshintrc
@@ -0,0 +1 @@
+{ "esnext": true }
diff --git a/06 - Type Ahead/index.html b/06 - Type Ahead/index.html
@@ -0,0 +1,70 @@
+<!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 = [];
+// using the new fetch API.. with promises
+fetch(endpoint)
+  .then(blob => blob.json())
+  // spread the data into the push method to populate the cities array.
+  .then(data => cities.push(...data));
+  // .then(data => console.log(data));
+
+function findMatches(wordToMatch, cities) {
+  return cities.filter(place => {
+    // figure out if the city or state matches what was searched
+    const regex = new RegExp(wordToMatch, 'gi'); // global, insensitive
+    return place.city.match(regex) || place.state.match(regex);
+  });
+}
+
+function numberWithCommas(x) {
+  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
+}
+
+function displayMatches() {
+  // console.log(this.value);
+  const matchArray = findMatches(this.value, cities);
+  console.log(matchArray);
+  const html = matchArray.map(place => {
+
+    // create the highlight
+    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(''); // convert the array to a string.
+  suggestions.innerHTML = html;
+}
+
+const searchInput = document.querySelector('.search');
+const suggestions = document.querySelector('.suggestions');
+
+searchInput.addEventListener('change', displayMatches);
+searchInput.addEventListener('keyup', displayMatches);
+
+</script>
+  </body>
+</html>
