show in the UI if a player is disconnected

public/buzzer.js

@@ -22,7 +22,17 @@ const on = (event, cb) => document.addEventListener(event, cb)
 function node(type, { appendTo, cls, text, data, style, ...attrs } = {}) {
   let elem = typeof type === "string" ? document.createElement(type) : type
   if (cls) {
-    elem.className = cls
+    if (typeof cls === "string") {
+      elem.className = cls
+    } else {
+      for (const [name, on] of Object.entries(cls)) {
+        if (on) {
+          elem.classList.add(name)
+        } else {
+          elem.classList.remove(name)
+        }
+      }
+    }
   }
   if (text) {
     elem.textContent = text
@@ -105,7 +115,10 @@ function redraw_clients(me, clients) {
       text: c.name,
       data: { cid: c.id },
       appendTo: ul,
-      cls: c.id === me.id ? "me" : "",
+      cls: {
+        me: c.id === me.id,
+        inactive: !c.active,
+      },
     })
   }
 }