main app code and some default modules

www/js/install-button.js

@@ -0,0 +1,41 @@
+
+define(function(require) {
+    var install = require('install');
+
+    function update() {
+        var btn = document.getElementById('install-btn');
+        if(install.state == 'uninstalled') {
+            btn.style.display = 'block';
+        }
+        else if(install.state == 'installed' || install.state == 'unsupported') {
+            btn.style.display = 'none';
+        }
+    }
+
+    function init() {
+        var btn = document.getElementById('install-btn');
+        btn.addEventListener('click', function() {
+            install();
+        });
+
+        install.on('change', update);
+
+        install.on('error', function(e, err) {
+            // Feel free to customize this
+            alert('There was an error during installation.');
+        });
+
+        install.on('showiOSInstall', function() {
+            // Feel free to customize this
+            alert('To install, press the forward arrow in Safari ' +
+                  'and touch "Add to Home Screen"');
+        });
+    }
+
+    if(!document.getElementById('install-btn')) {
+        document.addEventListener('DOMContentLoaded', init);
+    }
+    else {
+        init();
+    }
+});