Add CommonRoom script (#220)

Same as svix/www#373

Author: svix-lucho

docusaurus.config.js

@@ -121,6 +121,11 @@ module.exports = {
     src: "/js/segment.js",
     async: true,
     defer: true,
+  },
+  {
+    src: "/js/commonroom.js",
+    async: true,
+    defer: true,
   }
   ],
   markdown: {

static/js/commonroom.js

@@ -0,0 +1,18 @@
+(function () {
+  if (typeof window === 'undefined') return;
+  if (typeof window.signals !== 'undefined') return;
+  var script = document.createElement('script');
+  script.src = 'https://cdn.cr-relay.com/v1/site/b184a8a2-6ac1-4606-b0cb-a52a8b86395b/signals.js';
+  script.async = true;
+  window.signals = Object.assign(
+    [],
+    ['page', 'identify', 'form'].reduce(function (acc, method) {
+      acc[method] = function () {
+        signals.push([method, arguments]);
+        return signals;
+      };
+      return acc;
+    }, {})
+  );
+  document.head.appendChild(script);
+})();