init

src/example.js

@@ -0,0 +1,12 @@
+'use strict'
+
+const username = 'freddy'
+typeof username === 'strng'
+
+if (!'serviceWorker' in navigator) {
+  // you have an old browser :-(
+}
+
+const greeting = 'hello'
+console.log('${greeting} world!')
+[1, 2, 3].forEach(x => console.log(x))