支持 js websocket

examples/js_ws/index.js

@@ -0,0 +1,18 @@
+let ws = websocket();
+let shouldExit = false;
+while (!shouldExit) {
+    let data = ws.readText();
+    switch (data) {
+        case "exit":
+            shouldExit = true;
+            break;
+        case "panic":
+            throw Error("错误");
+        case "date":
+            ws.writeText(new Date().toJSON())
+            break
+        default:
+            ws.writeText("收到信息:" + data)
+            break;
+    }
+}