edit server code

src/reload/server.ts

@@ -2,29 +2,30 @@ import { WebSocketServer, WebSocket } from "ws";
 import chokidar from "chokidar";
 import { clearTimeout } from "timers";
 
-const port = 8081;
-const wss = new WebSocketServer({ port });
+const PORT = 8081;
+const wss = new WebSocketServer({ port: PORT });
 
 const wsSet: Set<WebSocket> = new Set();
 
-console.log("ws server:" + port);
+console.log("ws server:" + PORT);
 
 wss.on("connection", (ws) => {
   ws.addEventListener("message", (event) => {
-    if (event.data === "add") {
-      wsSet.add(ws);
-    }
-    if (event.data === "remove") {
-      wsSet.delete(ws);
+    switch (event.data) {
+      case "add":
+        return wsSet.add(ws);
+      case "remove":
+        return wsSet.delete(ws);
     }
   });
 });
 
-let timer;
+let timer: NodeJS.Timeout;
+const DELAY = 200;
 chokidar.watch("dist").on("all", () => {
   clearTimeout(timer);
   // debounce
   timer = setTimeout(() => {
     wsSet.forEach((ws) => ws.send("update"));
-  }, 200);
+  }, DELAY);
 });