Day 6: Add a functional type ahead

dandenney · dandenney · commit 1999cf5a0b4c · 2016-12-15T19:30:13.000-05:00
This one blew my mind. It seems like such a complicated feature but Wes
made it feel easy. I love that he found the same regex that I used in
my data project and I'm likely going to be able to use this in there
to sort tracks
diff --git a/06 - Type Ahead/day-06.js b/06 - Type Ahead/day-06.js
@@ -13,5 +13,34 @@ fetch(endpoint)
   .then(blob => blob.json())
   .then(data => cities.push(...data))
 
-console.clear();
-console.log(cities);
+function findMatches(wordToMatch, cities) {
+  return cities.filter(place => {
+    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('input', displayMatches);
