Fixes #18 by removing old ripples when a new one is created

scripts/ripples.js

@@ -37,6 +37,9 @@ var ripples = {
                 rippleEnd       = new CustomEvent("rippleEnd", {detail: $ripple}),
                 refreshElementStyle;
 
+            // remove old ripples
+            $($rippleWrapper).find(".ripple").remove();
+
             // Set ripple class
             $ripple.className = "ripple";