Added multiple download option

app/templates/selectbox.js

@@ -0,0 +1,56 @@
+const html = require('choo/html');
+
+module.exports = function(selected, options, translate, changed) {
+  const id = `select-${Math.random()}`;
+  let x = selected;
+
+  function close() {
+    const ul = document.getElementById(id);
+    const body = document.querySelector('body');
+    ul.classList.remove('active');
+    body.removeEventListener('click', close);
+  }
+
+  function toggle(event) {
+    event.stopPropagation();
+    const ul = document.getElementById(id);
+    if (ul.classList.contains('active')) {
+      close();
+    } else {
+      ul.classList.add('active');
+      const body = document.querySelector('body');
+      body.addEventListener('click', close);
+    }
+  }
+
+  function choose(event) {
+    event.stopPropagation();
+    const target = event.target;
+    const value = +target.dataset.value;
+    target.parentNode.previousSibling.firstElementChild.textContent = translate(
+      value
+    );
+    if (x !== value) {
+      x = value;
+      changed(value);
+    }
+    close();
+  }
+  return html`
+    <div class="selectbox">
+      <div onclick=${toggle}>
+        <span class="link">${translate(selected)}</span>
+        <svg width="32" height="32">
+          <polygon points="8 18 17 28 26 18" fill="#0094fb"/>
+        </svg>
+      </div>
+      <ul id="${id}" class="selectOptions">
+        ${options.map(
+          i =>
+            html`<li class="selectOption" onclick=${choose} data-value="${i}">${
+              i
+            }</li>`
+        )}
+      </ul>
+    </div>`;
+};