diff --git a/components/affix/index.jsx b/components/affix/index.tsx
similarity index 92%
rename from components/affix/index.jsx
rename to components/affix/index.tsx
index b38d2dd65..711a234c2 100644
--- a/components/affix/index.jsx
+++ b/components/affix/index.tsx
@@ -1,4 +1,4 @@
-import { inject } from 'vue';
+import { App, CSSProperties, defineComponent, inject } from 'vue';
 import PropTypes from '../_util/vue-types';
 import classNames from '../_util/classNames';
 import omit from 'omit.js';
@@ -18,6 +18,17 @@ import {
 function getDefaultTarget() {
   return typeof window !== 'undefined' ? window : null;
 }
+enum AffixStatus {
+  None,
+  Prepare,
+}
+export interface AffixState {
+  affixStyle?: CSSProperties;
+  placeholderStyle?: CSSProperties;
+  status: AffixStatus;
+  lastAffix: boolean;
+  prevTarget: Window | HTMLElement | null;
+}
 
 // Affix
 const AffixProps = {
@@ -36,11 +47,7 @@ const AffixProps = {
   onChange: PropTypes.func,
   onTestUpdatePosition: PropTypes.func,
 };
-const AffixStatus = {
-  None: 'none',
-  Prepare: 'Prepare',
-};
-const Affix = {
+const Affix = defineComponent({
   name: 'AAffix',
   props: AffixProps,
   mixins: [BaseMixin],
@@ -49,6 +56,7 @@ const Affix = {
       configProvider: inject('configProvider', defaultConfigProvider),
     };
   },
+  emits: ['change', 'testUpdatePosition'],
   data() {
     return {
       affixStyle: undefined,
@@ -56,6 +64,7 @@ const Affix = {
       status: AffixStatus.None,
       lastAffix: false,
       prevTarget: null,
+      timeout: null,
     };
   },
   beforeMount() {
@@ -103,9 +112,9 @@ const Affix = {
   beforeUnmount() {
     clearTimeout(this.timeout);
     removeObserveTarget(this);
-    this.updatePosition.cancel();
+    (this.updatePosition as any).cancel();
     // https://github.com/ant-design/ant-design/issues/22683
-    this.lazyUpdatePosition.cancel();
+    (this.lazyUpdatePosition as any).cancel();
   },
   methods: {
     getOffsetTop() {
@@ -152,9 +161,9 @@ const Affix = {
 
       const newState = {
         status: AffixStatus.None,
-      };
+      } as AffixState;
       const targetRect = getTargetRect(targetNode);
-      const placeholderReact = getTargetRect(this.$refs.placeholderNode);
+      const placeholderReact = getTargetRect(this.$refs.placeholderNode as HTMLElement);
       const fixedTop = getFixedTop(placeholderReact, targetRect, offsetTop);
       const fixedBottom = getFixedBottom(placeholderReact, targetRect, offsetBottom);
       if (fixedTop !== undefined) {
@@ -218,7 +227,7 @@ const Affix = {
         const targetNode = target();
         if (targetNode && this.$refs.placeholderNode) {
           const targetRect = getTargetRect(targetNode);
-          const placeholderReact = getTargetRect(this.$refs.placeholderNode);
+          const placeholderReact = getTargetRect(this.$refs.placeholderNode as HTMLElement);
           const fixedTop = getFixedTop(placeholderReact, targetRect, offsetTop);
           const fixedBottom = getFixedBottom(placeholderReact, targetRect, offsetBottom);
 
@@ -256,10 +265,9 @@ const Affix = {
       </ResizeObserver>
     );
   },
-};
-
+});
 /* istanbul ignore next */
-Affix.install = function(app) {
+Affix.install = function(app: App) {
   app.component(Affix.name, Affix);
 };
 
diff --git a/components/affix/utils.js b/components/affix/utils.ts
similarity index 55%
rename from components/affix/utils.js
rename to components/affix/utils.ts
index 52876ae97..898f8d68d 100644
--- a/components/affix/utils.js
+++ b/components/affix/utils.ts
@@ -1,22 +1,34 @@
 import addEventListener from '../vc-util/Dom/addEventListener';
+import { ComponentPublicInstance } from 'vue';
 
-export function getTargetRect(target) {
+export type BindElement = HTMLElement | Window | null | undefined;
+export type Rect = ClientRect | DOMRect;
+
+export function getTargetRect(target: BindElement): ClientRect {
   return target !== window
-    ? target.getBoundingClientRect()
-    : { top: 0, bottom: window.innerHeight };
+    ? (target as HTMLElement).getBoundingClientRect()
+    : ({ top: 0, bottom: window.innerHeight } as ClientRect);
 }
 
-export function getFixedTop(placeholderReact, targetRect, offsetTop) {
+export function getFixedTop(
+  placeholderReact: Rect,
+  targetRect: Rect,
+  offsetTop: number | undefined,
+) {
   if (offsetTop !== undefined && targetRect.top > placeholderReact.top - offsetTop) {
-    return offsetTop + targetRect.top + 'px';
+    return `${offsetTop + targetRect.top}px`;
   }
   return undefined;
 }
 
-export function getFixedBottom(placeholderReact, targetRect, offsetBottom) {
+export function getFixedBottom(
+  placeholderReact: Rect,
+  targetRect: Rect,
+  offsetBottom: number | undefined,
+) {
   if (offsetBottom !== undefined && targetRect.bottom < placeholderReact.bottom + offsetBottom) {
     const targetBottomOffset = window.innerHeight - targetRect.bottom;
-    return offsetBottom + targetBottomOffset + 'px';
+    return `${offsetBottom + targetBottomOffset}px`;
   }
   return undefined;
 }
@@ -32,17 +44,26 @@ const TRIGGER_EVENTS = [
   'load',
 ];
 
-let observerEntities = [];
+interface ObserverEntity {
+  target: HTMLElement | Window;
+  affixList: ComponentPublicInstance<any>[];
+  eventHandlers: { [eventName: string]: any };
+}
+
+let observerEntities: ObserverEntity[] = [];
 
 export function getObserverEntities() {
   // Only used in test env. Can be removed if refactor.
   return observerEntities;
 }
 
-export function addObserveTarget(target, affix) {
+export function addObserveTarget(
+  target: HTMLElement | Window | null,
+  affix: ComponentPublicInstance<any>,
+): void {
   if (!target) return;
 
-  let entity = observerEntities.find(item => item.target === target);
+  let entity: ObserverEntity | undefined = observerEntities.find(item => item.target === target);
 
   if (entity) {
     entity.affixList.push(affix);
@@ -56,16 +77,16 @@ export function addObserveTarget(target, affix) {
 
     // Add listener
     TRIGGER_EVENTS.forEach(eventName => {
-      entity.eventHandlers[eventName] = addEventListener(target, eventName, () => {
-        entity.affixList.forEach(targetAffix => {
-          targetAffix.lazyUpdatePosition();
+      entity!.eventHandlers[eventName] = addEventListener(target, eventName, () => {
+        entity!.affixList.forEach(targetAffix => {
+          (targetAffix as any).lazyUpdatePosition();
         });
       });
     });
   }
 }
 
-export function removeObserveTarget(affix) {
+export function removeObserveTarget(affix: ComponentPublicInstance<any>): void {
   const observerEntity = observerEntities.find(oriObserverEntity => {
     const hasAffix = oriObserverEntity.affixList.some(item => item === affix);
     if (hasAffix) {
diff --git a/tsconfig.json b/tsconfig.json
index deaedc68a..52bce7dcf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,8 +2,7 @@
   "compilerOptions": {
     "baseUrl": "./",
     "paths": {
-      "ant-design-vue": ["components/index.tsx"],
-      "ant-design-vue/es/*": ["components/*"]
+      "ant-design-vue": ["components/index.tsx"]
     },
     "strictNullChecks": false,
     "strict": true,