first commit

code/SmallCart/SmallCartMain/data/js/WebSocket.js

@@ -0,0 +1,38 @@
+class WS {
+    constructor() {
+        this.ws = null;
+        this.connect();
+        this.onopen();
+        this.onclose();
+        this.onerror();
+    }
+
+    connect() {
+        this.ws = new WebSocket("ws://192.168.4.1:81");
+        console.log("this.ws: ", this.ws);
+    }
+
+    onopen() {
+        this.ws.onopen = () => {
+            console.log("WebSocket open");
+        }
+    }
+
+    onmessage(callback) {
+        this.ws.onmessage = (e) => {
+           callback(e.data)
+        }
+    }
+
+    onclose() {
+        this.ws.onclose = (e) => {
+            console.log("close");
+        }
+    }
+
+    onerror() {
+        this.ws.onerror = (e) => {
+            console.log("onerror");
+        }
+    }
+}