js:add notification plugin

doric-js/bundle/doric-sandbox.js

@@ -1310,6 +1310,17 @@ var doric = (function (exports) {
         register(instance) {
             this.entity = instance;
         }
+        function2Id(func) {
+            const functionId = uniqueId('function');
+            this.callbacks.set(functionId, {
+                resolve: func,
+                reject: () => { loge("This should not be called"); }
+            });
+            return functionId;
+        }
+        removeFuncById(funcId) {
+            this.callbacks.delete(funcId);
+        }
     }
     const gContexts = new Map;
     const gModules = new Map;

doric-js/bundle/doric-vm.js

@@ -1333,6 +1333,17 @@ class Context {
     register(instance) {
         this.entity = instance;
     }
+    function2Id(func) {
+        const functionId = uniqueId('function');
+        this.callbacks.set(functionId, {
+            resolve: func,
+            reject: () => { loge("This should not be called"); }
+        });
+        return functionId;
+    }
+    removeFuncById(funcId) {
+        this.callbacks.delete(funcId);
+    }
 }
 const gContexts = new Map;
 const gModules = new Map;