Added new frontend.

visualizer/public/vendor/htmx/ext/event-header.js

@@ -0,0 +1,37 @@
+(function(){
+    function stringifyEvent(event) {
+        var obj = {};
+        for (var key in event) {
+            obj[key] = event[key];
+        }
+        return JSON.stringify(obj, function(key, value){
+            if(value instanceof Node){
+                var nodeRep = value.tagName;
+                if (nodeRep) {
+                    nodeRep = nodeRep.toLowerCase();
+                    if(value.id){
+                        nodeRep += "#" + value.id;
+                    }
+                    if(value.classList && value.classList.length){
+                        nodeRep += "." + value.classList.toString().replace(" ", ".")
+                    }
+                    return nodeRep;
+                } else {
+                    return "Node"
+                }
+            }
+            if (value instanceof Window) return 'Window';
+            return value;
+        });
+    }
+
+    htmx.defineExtension('event-header', {
+        onEvent: function (name, evt) {
+            if (name === "htmx:configRequest") {
+                if (evt.detail.triggeringEvent) {
+                    evt.detail.headers['Triggering-Event'] = stringifyEvent(evt.detail.triggeringEvent);
+                }
+            }
+        }
+    });
+})();