diff --git a/djx/build.gradle b/djx/build.gradle
--- a/djx/build.gradle
+++ b/djx/build.gradle
@@ -40,7 +40,7 @@ configureTsMain {
             "dojo/*" : [ "typings/dojo/*" ],
             "dijit/*" : [ "typings/dijit/*" ]
         ]*/
-        types = ["requirejs", "dojo-typings"]
+        types = ["requirejs", "@implab/dojo-typings"]
     }
 }
 
diff --git a/djx/package-lock.json b/djx/package-lock.json
--- a/djx/package-lock.json
+++ b/djx/package-lock.json
@@ -10,12 +10,12 @@
             "license": "BSD-2-Clause",
             "devDependencies": {
                 "@implab/core-amd": "^1.4.0",
+                "@implab/dojo-typings": "/home/sergey/projects/implabjs-dojo-typings/dojo-typings/build/npm/package/implab-dojo-typings-v1.0.0-rc4.tgz",
                 "@types/chai": "4.1.3",
                 "@types/requirejs": "2.1.31",
                 "@types/yaml": "1.2.0",
                 "chai": "4.2.0",
                 "dojo": "1.16.0",
-                "dojo-typings": "~1.11.9",
                 "eslint": "6.8.0",
                 "requirejs": "2.3.6",
                 "tslint": "^6.1.3",
@@ -62,6 +62,13 @@
             "integrity": "sha512-gaJX1mhri7YpmXDTAYELZnmTznzXYpk2AI7Decsttdi6xY+bqGgH24q0AFcKrx8RY2jfsFXxDdf0fITz2HpBbw==",
             "dev": true
         },
+        "node_modules/@implab/dojo-typings": {
+            "version": "v1.0.0-rc4",
+            "resolved": "file:../../implabjs-dojo-typings/dojo-typings/build/npm/package/implab-dojo-typings-v1.0.0-rc4.tgz",
+            "integrity": "sha512-whWA/3shw3j4WFdmh5ml9BYZMj4KFruv1YXtz29W0LXMNpmj5nyyM8FJYYCdtvWJEGvnEUcUCQ0zsZ+Gh5ah9Q==",
+            "dev": true,
+            "license": "MIT"
+        },
         "node_modules/@types/chai": {
             "version": "4.1.3",
             "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.3.tgz",
@@ -374,15 +381,6 @@
             "integrity": "sha512-DUiXyoLK6vMF5BPr/qiMLTxDMfiM9qlzN1jxfDsVfuvB/CwhYpNxA/M4mbqKN8PCVGLmccXBJbfmFJPP5+zmzw==",
             "dev": true
         },
-        "node_modules/dojo-typings": {
-            "version": "1.11.9",
-            "resolved": "https://registry.npmjs.org/dojo-typings/-/dojo-typings-1.11.9.tgz",
-            "integrity": "sha512-mh8w+Mau2Y1QfTEszEAdO7j6ycNhYxF/Ing6nAk1eUg6NxjeT0viVHjICMd9sU3U463vM2G+KfBBK5grk3/Mlw==",
-            "dev": true,
-            "dependencies": {
-                "@types/chai": "^4.0.4"
-            }
-        },
         "node_modules/emoji-regex": {
             "version": "8.0.0",
             "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -1561,6 +1559,11 @@
             "integrity": "sha512-gaJX1mhri7YpmXDTAYELZnmTznzXYpk2AI7Decsttdi6xY+bqGgH24q0AFcKrx8RY2jfsFXxDdf0fITz2HpBbw==",
             "dev": true
         },
+        "@implab/dojo-typings": {
+            "version": "file:/home/sergey/projects/implabjs-dojo-typings/dojo-typings/build/npm/package/implab-dojo-typings-v1.0.0-rc4.tgz",
+            "integrity": "sha512-whWA/3shw3j4WFdmh5ml9BYZMj4KFruv1YXtz29W0LXMNpmj5nyyM8FJYYCdtvWJEGvnEUcUCQ0zsZ+Gh5ah9Q==",
+            "dev": true
+        },
         "@types/chai": {
             "version": "4.1.3",
             "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.3.tgz",
@@ -1821,15 +1824,6 @@
             "integrity": "sha512-DUiXyoLK6vMF5BPr/qiMLTxDMfiM9qlzN1jxfDsVfuvB/CwhYpNxA/M4mbqKN8PCVGLmccXBJbfmFJPP5+zmzw==",
             "dev": true
         },
-        "dojo-typings": {
-            "version": "1.11.9",
-            "resolved": "https://registry.npmjs.org/dojo-typings/-/dojo-typings-1.11.9.tgz",
-            "integrity": "sha512-mh8w+Mau2Y1QfTEszEAdO7j6ycNhYxF/Ing6nAk1eUg6NxjeT0viVHjICMd9sU3U463vM2G+KfBBK5grk3/Mlw==",
-            "dev": true,
-            "requires": {
-                "@types/chai": "^4.0.4"
-            }
-        },
         "emoji-regex": {
             "version": "8.0.0",
             "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
diff --git a/djx/package.json b/djx/package.json
--- a/djx/package.json
+++ b/djx/package.json
@@ -25,7 +25,7 @@
         "@types/yaml": "1.2.0",
         "chai": "4.2.0",
         "dojo": "1.16.0",
-        "dojo-typings": "~1.11.9",
+        "@implab/dojo-typings": "/home/sergey/projects/implabjs-dojo-typings/dojo-typings/build/npm/package/implab-dojo-typings-v1.0.0-rc4.tgz",
         "eslint": "6.8.0",
         "requirejs": "2.3.6",
         "tslint": "^6.1.3",
diff --git a/djx/src/main/ts/declare.ts b/djx/src/main/ts/declare.ts
--- a/djx/src/main/ts/declare.ts
+++ b/djx/src/main/ts/declare.ts
@@ -124,7 +124,7 @@ export function djclass<T extends Abstra
         // t - базовый класс, объявленный при помощи dojo/_base/declare
         const t = bc.bases;
 
-        const cls = declare(bc.bases, target.prototype);
+        const cls = declare<any>(bc.bases, target.prototype);
 
         // bc - базовый класс, bc.prototype используется как super
         // при вызове базовых методов. Нужно создать bc.prototype
diff --git a/djx/src/main/ts/tsx/DjxWidgetBase.ts b/djx/src/main/ts/tsx/DjxWidgetBase.ts
--- a/djx/src/main/ts/tsx/DjxWidgetBase.ts
+++ b/djx/src/main/ts/tsx/DjxWidgetBase.ts
@@ -1,4 +1,4 @@
-import { djbase, djclass } from "../declare";
+import { AbstractConstructor, djbase, djclass } from "../declare";
 import _WidgetBase = require("dijit/_WidgetBase");
 import _AttachMixin = require("dijit/_AttachMixin");
 import { Rendition, isNode, startupWidgets } from "./traits";
@@ -14,18 +14,16 @@ export interface EventArgs {
     composed?: boolean;
 }
 
-export interface DjxWidgetBase<Attrs = any, Events extends { [name in keyof Events]: Event } = any> {
-    set<K extends keyof Attrs & string>(key: K, value: Attrs[K]): this;
-    set(props: Partial<Attrs>): this;
-    get<K extends keyof Attrs & string>(key: K): Attrs[K];
+export interface DjxWidgetBase<Attrs = {}, Events extends { [name in keyof Events]: Event } = {}> extends
+    _WidgetBase<Events> {
+}
 
-    on<K extends keyof Events & string>(eventName: K, cb: (evt: Events[K]) => void): dojo.WatchHandle;
-
-    emit<K extends keyof Events & string>(eventName: K, evt: Omit<Events[K], keyof Event> & EventArgs): void;
+type _super = {
+    startup(): void;
 }
 
 @djclass
-export abstract class DjxWidgetBase<Attrs = any, Events = any> extends djbase(_WidgetBase, _AttachMixin) {
+export abstract class DjxWidgetBase<Attrs = {}, Events = {}> extends djbase<_super, _AttachMixin>(_WidgetBase, _AttachMixin) {
 
     buildRendering() {
         this.domNode = this.render().getDomNode();
@@ -46,7 +44,7 @@ export abstract class DjxWidgetBase<Attr
 
     _processTemplateNode<T extends (Element | Node | _WidgetBase)>(
         baseNode: T,
-        getAttrFunc: (baseNode: T, attr: string) => string,
+        getAttrFunc: (baseNode: T, attr: string) => any,
         // tslint:disable-next-line: ban-types
         attachFunc: (node: T, type: string, func?: Function) => dojo.Handle
     ): boolean {
@@ -55,7 +53,7 @@ export abstract class DjxWidgetBase<Attr
             if (w) {
                 // from dijit/_WidgetsInTemplateMixin
                 this._processTemplateNode(w,
-                    (n, p) => n.get(p), // callback to get a property of a widget
+                    (n, p) => n.get(p as any), // callback to get a property of a widget
                     (widget, type, callback) => {
                         if (!callback)
                             throw new Error("The callback must be specified");
diff --git a/djx/src/main/ts/tsx/traits.ts b/djx/src/main/ts/tsx/traits.ts
--- a/djx/src/main/ts/tsx/traits.ts
+++ b/djx/src/main/ts/tsx/traits.ts
@@ -1,8 +1,10 @@
-import { IDestroyable } from "@implab/core-amd/interfaces";
+import { IDestroyable, IRemovable } from "@implab/core-amd/interfaces";
 import { isDestroyable } from "@implab/core-amd/safe";
 import _WidgetBase = require("dijit/_WidgetBase");
 import registry = require("dijit/registry");
 import dom = require("dojo/dom-construct");
+import Stateful = require("dojo/Stateful");
+import { FunctionRendition } from "./FunctionRendition";
 
 type _WidgetBaseConstructor = typeof _WidgetBase;
 
@@ -145,4 +147,58 @@ export function startupWidgets(target: N
         if(target.startup)
             target.startup();
     }
-}
\ No newline at end of file
+}
+
+
+type StatefulProps<T> = T extends Stateful<infer A> ? A : never;
+
+type CleanFn = (instance: IRemovable | IDestroyable) => void;
+
+/**
+ * Observers the property and calls render callback each change.
+ *
+ * @param target The target object which property will be observed.
+ * @param prop The name of the property.
+ * @param render The callback which will be called every time the value is changed
+ * @param cleanupOrOwner The object with method `own` or an callback to register lifecycle for the observer.
+ * @returns Rendition which is created instantly
+ */
+export function watch<W extends _WidgetBase, K extends keyof W> (
+    target: W,
+    prop: K,
+    render: (model: W[K]) => any,
+    cleanupOrOwner?: {own: CleanFn} | CleanFn
+): Rendition;
+/**
+ * Observers the property and calls render callback each change.
+ *
+ * @param target The target object which property will be observed.
+ * @param prop The name of the property.
+ * @param render The callback which will be called every time the value is changed
+ * @param cleanupOrOwner The object with method `own` or an callback to register lifecycle for the observer.
+ * @returns Rendition which is created instantly
+ */
+export function watch<T extends Stateful, K extends keyof StatefulProps<T>>(
+    target: T,
+    prop: K,
+    render: (model: StatefulProps<T>[K]) => any,
+    cleanupOrOwner?: {own: CleanFn} | CleanFn
+): Rendition;
+export function watch<T extends Stateful, K extends keyof StatefulProps<T> & string>(
+    target: T,
+    prop: K,
+    render: (model:  StatefulProps<T>[K]) => any,
+    cleanupOrOwner: {own: CleanFn} | CleanFn = () => {}
+) {
+    let rendition = new FunctionRendition(() => render(target.get(prop)));
+    const _own = cleanupOrOwner instanceof Function ? cleanupOrOwner : (x: IRemovable) => cleanupOrOwner.own(x)
+    _own(target.watch(prop, (_name, oldValue, newValue) => {
+        if (oldValue !== newValue) {
+            const newRendition = new FunctionRendition(() => render(newValue));
+            newRendition.placeAt(rendition.getDomNode(), "replace");
+            destroy(rendition.getDomNode());
+            rendition = newRendition;
+        }
+    }));
+    return rendition;
+}
diff --git a/djx/src/main/tsconfig.json b/djx/src/main/tsconfig.json
--- a/djx/src/main/tsconfig.json
+++ b/djx/src/main/tsconfig.json
@@ -7,7 +7,7 @@
             "typings"
         ],
         "types": [
-            "requirejs", "./typings", "dojo-typings"
+            "requirejs", "./typings", "@implab/dojo-typings"
         ]
     }
 }
diff --git a/djx/src/main/typings/dijit.d.ts b/djx/src/main/typings/dijit.d.ts
--- a/djx/src/main/typings/dijit.d.ts
+++ b/djx/src/main/typings/dijit.d.ts
@@ -1,14 +0,0 @@
-declare namespace dijit {
-    interface _WidgetBase {
-
-        _started?: boolean;
-
-        _set<K extends keyof this>(key: K, value: this[K]): void;
-    }
-
-    interface TooltipDialog {
-
-        content: any;
-
-    }
-}
diff --git a/djx/src/test/ts/view/MyWidget.tsx b/djx/src/test/ts/view/MyWidget.tsx
--- a/djx/src/test/ts/view/MyWidget.tsx
+++ b/djx/src/test/ts/view/MyWidget.tsx
@@ -10,9 +10,13 @@ interface MyWidgetAttrs {
 }
 
 interface MyWidgetEvents {
-    "count-inc": Event;
+    "count-inc": Event & {
+        detail: number;
+    };
 
-    "count-dec": Event;
+    "count-dec": Event & {
+        detail: number;
+    };
 }
 
 
@@ -37,14 +41,15 @@ export class MyWidget extends djbase(Djx
     }
 
     _onSubmit(e: Event) {
-
     }
 
     _onIncClick(e: MouseEvent) {
+        this.set("counter", this.counter+1);
+
         this.emit("count-inc", { bubbles: false });
     }
 
     _onDecClick() {
-        this.emit("count-dec", { bubbles: false });
+        this.emit("count-dec", { bubbles: false, detail: this.counter });
     }
 }
diff --git a/djx/src/test/tsconfig.json b/djx/src/test/tsconfig.json
--- a/djx/src/test/tsconfig.json
+++ b/djx/src/test/tsconfig.json
@@ -8,6 +8,6 @@
             "../main/ts",
             "../main/typings"
         ],
-        "types": ["requirejs", "../main/typings", "dojo-typings"]
+        "types": ["requirejs", "../main/typings", "@implab/dojo-typings"]
     }
 }
\ No newline at end of file