Create dropdown.js

src/app/dropdown.js

+var yo = require('yo-yo')
+var csjs = require('csjs-inject')
+
+// -------------- styling ----------------------
+var csjs = require('csjs-inject')
+var styleGuide = require('./style-guide')
+var styles = styleGuide()
+
+module.exports = dropdown
+
+// options = []
+function dropdown (options = []) {
+  var el = yo`
+    <select>
+      ${options.map(opt => yo`<option>${opt}</option>`)}
+    </select>
+  `
+}