update connect and disconnect

src/WW.js

@@ -72,20 +72,25 @@ export class WW extends Observable {
    * 2.No datas from targetWW will be streamed to current WW.
    * 3.If a WW is be connected already then the connection
    *   between them is remain effective. */
-  connect(targetWW) {
+  connect(targetWW, install, predict) {
 
     if (targetWW.ident in this.#connected) {
       // Already connected no effect
       return;
     }
 
-    let sub = this.subscribe(data => {
-      targetWW.postMessage(data);
-    });
+    install(targetWW);
+
+    let sub = this.pipe(filter(data => predict(data)))
+                  .subscribe(data => { targetWW.postMessage(data); });
+
     this.#connected[targetWW.ident] = sub;
   }
 
-  disconnect(targetWW) {
+  disconnect(targetWW, uninstall) {
+
+    uninstall(targetWW);
+
     if (targetWW.ident in this.#connected) {
       this.#connected[targetWW.ident].unsubscribe();
       delete this.#connected[targetWW.ident];