Sandboxed Poll app with less2

www/poll/main.js

@@ -0,0 +1,41 @@
+// Load #1, load as little as possible because we are in a race to get the loading screen up.
+define([
+    '/bower_components/nthen/index.js',
+    '/api/config',
+    'jquery',
+    '/common/requireconfig.js',
+    '/common/sframe-common-outer.js',
+], function (nThen, ApiConfig, $, RequireConfig, SFCommonO, Cryptpad, Netflux) {
+    var requireConfig = RequireConfig();
+
+    // Loaded in load #2
+    nThen(function (waitFor) {
+        $(waitFor());
+    }).nThen(function (waitFor) {
+        var req = {
+            cfg: requireConfig,
+            req: [ '/common/loading.js' ],
+            pfx: window.location.origin
+        };
+        window.rc = requireConfig;
+        window.apiconf = ApiConfig;
+        $('#sbox-iframe').attr('src',
+            ApiConfig.httpSafeOrigin + '/poll/inner.html?' + requireConfig.urlArgs +
+                '#' + encodeURIComponent(JSON.stringify(req)));
+
+        // This is a cheap trick to avoid loading sframe-channel in parallel with the
+        // loading screen setup.
+        var done = waitFor();
+        var onMsg = function (msg) {
+            var data = JSON.parse(msg.data);
+            if (data.q !== 'READY') { return; }
+            window.removeEventListener('message', onMsg);
+            var _done = done;
+            done = function () { };
+            _done();
+        };
+        window.addEventListener('message', onMsg);
+    }).nThen(function (/*waitFor*/) {
+        SFCommonO.start();
+    });
+});