diff --git a/examples/index.html b/examples/index.html
new file mode 100644
index 0000000..c78a17c
--- /dev/null
+++ b/examples/index.html
@@ -0,0 +1,37 @@
+<h1>Type and check the console</h1>
+
+<script>
+    window.onclick = function(events) {
+        console.log({
+            event: "click",
+            altKey: events.altKey,
+            shiftKey: events.shiftKey
+        });
+    };
+
+    window.onkeydown = function(events) {
+        console.log({
+            event: "keydown",
+            key: events.key,
+            keyCode: events.keyCode,
+            keyChar: events.charCode
+        });
+    };
+
+    window.onkeyup = function(events) {
+        console.log({
+            event: "keyup",
+            key: events.key,
+            keyCode: events.keyCode,
+            keyChar: events.charCode
+        });
+    };
+
+    window.onmousemove = function(events) {
+        console.log({
+            event: "move",
+            x: events.x,
+            y: events.y
+        });
+    }
+</script>
\ No newline at end of file
diff --git a/key.go b/key.go
index 754ca96..f99c3e8 100644
--- a/key.go
+++ b/key.go
@@ -59,6 +59,33 @@ const (
 	KeyY = "y"
 	KeyZ = "z"
 	//
+	CapA = "A"
+	CapB = "B"
+	CapC = "C"
+	CapD = "D"
+	CapE = "E"
+	CapF = "F"
+	CapG = "G"
+	CapH = "H"
+	CapI = "I"
+	CapJ = "J"
+	CapK = "K"
+	CapL = "L"
+	CapM = "M"
+	CapN = "N"
+	CapO = "O"
+	CapP = "P"
+	CapQ = "Q"
+	CapR = "R"
+	CapS = "S"
+	CapT = "T"
+	CapU = "U"
+	CapV = "V"
+	CapW = "W"
+	CapX = "X"
+	CapY = "Y"
+	CapZ = "Z"
+	//
 	Key0 = "0"
 	Key1 = "1"
 	Key2 = "2"