diff --git a/demo.cola b/demo.cola
index 0650190d..c5edf4d6 100644
--- a/demo.cola
+++ b/demo.cola
@@ -9,18 +9,25 @@ function main(){
 
     console.log("pow:", 5 ** 2, "; modulo:", 5 %% 3, ";");
 
-    var a = 3.14, b = 584;
+    Number a = 3.14, b = 584, c;
 
     a ?= b; console.log(a);
     a = undefined;
     a ?= b; console.log(a);
 
+    console.log(a = c ? b);
+    c = 404;
+    console.log(a = c ? b);
+
+    b = undefined;
+    console.log("a is {{isset a ? 'set' : 'undefiend'}}, b is {{b?? ? 'set' : 'undefined'}}");
+
     console.log(`is:`, location.href is String, `; isnt:`, 123 isnt Number, ";");
 
     if(yes === true && on === true && no === false && off === false) console.log('Boolean alternatives');
 
     console.log('Raw string:', r`@test \n \t \r`);
-    var isEmail = /
+    RegExp isEmail = /
         ([\w-\.]+)
         @
         ((?:[\w]+\.)+)
diff --git a/lib/index.html b/lib/index.html
index ebceaad7..6df33c40 100644
--- a/lib/index.html
+++ b/lib/index.html
@@ -55,18 +55,25 @@
 
     console.log("pow:", 5 ** 2, "; modulo:", 5 %% 3, ";");
 
-    var a = 3.14, b = 584;
+    Number a = 3.14, b = 584, c;
 
     a ?= b; console.log(a);
     a = undefined;
     a ?= b; console.log(a);
 
+    console.log(a = c ? b);
+    c = 404;
+    console.log(a = c ? b);
+
+    b = undefined;
+    console.log("a is {{isset a ? 'set' : 'undefiend'}}, b is {{b?? ? 'set' : 'undefined'}}");
+
     console.log(`is:`, location.href is String, `; isnt:`, 123 isnt Number, ";");
 
     if(yes === true && on === true && no === false && off === false) console.log('Boolean alternatives');
 
     console.log('Raw string:', r`@test \n \t \r`);
-    var isEmail = /
+    RegExp isEmail = /
         ([\w-\.]+)
         @
         ((?:[\w]+\.)+)