Added search using elasticlunr.

assets/search.js

@@ -0,0 +1,38 @@
+fetch('/search_index.json')
+  .then(r => r.json())
+  .then(data => {
+    const idx = elasticlunr.Index.load(data);
+    const docs = idx.documentStore.docs;
+    console.log(Object.values(docs)[0])
+    const searchInput = document.getElementById('search');
+    const out = document.getElementById('searchResults');
+    const filterSelect = document.getElementById('searchMode');
+
+    function runSearch(q, tags) {
+      return idx.search(q, { expand: true })
+        .map(r => docs[r.ref] )
+        .filter(d => tags === 'all' || d.tags.includes(tags));
+    }
+
+    function render(doc) {
+      return `<div>
+        <img class="searchItemImage" src="${doc.image}">
+        <a class="searchItemTitle" href="${doc.url}">${doc.title}</a>
+        <p class="searchItemDescription">${doc.subtitle}</p>
+      </div>`;
+    }
+
+    function update() {
+      const q = searchInput.value.trim();
+      if (!q) {
+        out.innerHTML = '';
+        return;
+      }
+      
+      const results = runSearch(q, filterSelect.value);
+      out.innerHTML = results.map(render).join('');
+    }
+
+    searchInput.addEventListener('input', update);
+    filterSelect.addEventListener('change', update);
+  });