diff --git a/components/row/index.js b/components/row/index.ts
similarity index 67%
rename from components/row/index.js
rename to components/row/index.ts
index 38182e72a..9e17edebd 100644
--- a/components/row/index.js
+++ b/components/row/index.ts
@@ -1,7 +1,8 @@
+import { App } from 'vue';
 import { Row } from '../grid';
 
 /* istanbul ignore next */
-Row.install = function(app) {
+Row.install = function(app: App) {
   app.component(Row.name, Row);
   return app;
 };
diff --git a/components/row/style/index.js b/components/row/style/index.ts
similarity index 100%
rename from components/row/style/index.js
rename to components/row/style/index.ts
diff --git a/components/slider/index.jsx b/components/slider/index.tsx
similarity index 76%
rename from components/slider/index.jsx
rename to components/slider/index.tsx
index 95f14155c..51f317bdc 100644
--- a/components/slider/index.jsx
+++ b/components/slider/index.tsx
@@ -1,4 +1,4 @@
-import { inject } from 'vue';
+import { App, defineComponent, inject, VNodeTypes } from 'vue';
 import PropTypes from '../_util/vue-types';
 import BaseMixin from '../_util/BaseMixin';
 import { getOptionProps } from '../_util/props-util';
@@ -9,6 +9,21 @@ import Tooltip from '../tooltip';
 import { defaultConfigProvider } from '../config-provider';
 import abstractTooltipProps from '../tooltip/abstractTooltipProps';
 
+export type SliderValue = number | [number, number];
+
+interface HandleGeneratorInfo {
+  value: number;
+  dragging: boolean;
+  index: number;
+  rest: any[];
+}
+
+export type HandleGeneratorFn = (config: {
+  tooltipPrefixCls?: string;
+  prefixCls?: string;
+  info: HandleGeneratorInfo;
+}) => VNodeTypes;
+
 const tooltipProps = abstractTooltipProps();
 export const SliderProps = () => ({
   prefixCls: PropTypes.string,
@@ -30,22 +45,19 @@ export const SliderProps = () => ({
   tooltipPlacement: tooltipProps.placement,
   getTooltipPopupContainer: PropTypes.func,
   onChange: PropTypes.func,
-  'onUpdate:value': PropTypes.func,
   onAfterChange: PropTypes.func,
 });
 
-const defaultTipFormatter = value => value.toString();
+const defaultTipFormatter = (value: number) => value.toString();
 
-const Slider = {
+const Slider = defineComponent({
   name: 'ASlider',
   inheritAttrs: false,
-  // model: {
-  //   prop: 'value',
-  //   event: 'change',
-  // },
+  emits: ['update:value', 'change'],
   mixins: [BaseMixin],
   setup() {
     return {
+      vcSlider: null,
       configProvider: inject('configProvider', defaultConfigProvider),
     };
   },
@@ -58,7 +70,7 @@ const Slider = {
     };
   },
   methods: {
-    toggleTooltipVisible(index, visible) {
+    toggleTooltipVisible(index: number, visible: boolean) {
       this.setState(({ visibles }) => ({
         visibles: {
           ...visibles,
@@ -66,7 +78,11 @@ const Slider = {
         },
       }));
     },
-    handleWithTooltip(tooltipPrefixCls, prefixCls, { value, dragging, index, ...restProps }) {
+    handleWithTooltip(
+      tooltipPrefixCls: string,
+      prefixCls: string,
+      { value, dragging, index, ...restProps }: HandleGeneratorInfo,
+    ): VNodeTypes {
       const {
         tipFormatter = defaultTipFormatter,
         tooltipVisible,
@@ -98,7 +114,7 @@ const Slider = {
         </Tooltip>
       );
     },
-    saveSlider(node) {
+    saveSlider(node: any) {
       this.vcSlider = node;
     },
     focus() {
@@ -107,7 +123,7 @@ const Slider = {
     blur() {
       this.vcSlider.blur();
     },
-    handleChange(val) {
+    handleChange(val: SliderValue) {
       this.$emit('update:value', val);
       this.$emit('change', val);
     },
@@ -118,8 +134,8 @@ const Slider = {
       prefixCls: customizePrefixCls,
       tooltipPrefixCls: customizeTooltipPrefixCls,
       ...restProps
-    } = { ...getOptionProps(this), ...this.$attrs };
-    const getPrefixCls = this.configProvider.getPrefixCls;
+    } = { ...getOptionProps(this), ...this.$attrs } as any;
+    const { getPrefixCls } = this.configProvider;
     const prefixCls = getPrefixCls('slider', customizePrefixCls);
     const tooltipPrefixCls = getPrefixCls('tooltip', customizeTooltipPrefixCls);
     if (range) {
@@ -127,7 +143,8 @@ const Slider = {
         ...restProps,
         prefixCls,
         tooltipPrefixCls,
-        handle: info => this.handleWithTooltip(tooltipPrefixCls, prefixCls, info),
+        handle: (info: HandleGeneratorInfo) =>
+          this.handleWithTooltip(tooltipPrefixCls, prefixCls, info),
         ref: this.saveSlider,
         onChange: this.handleChange,
       };
@@ -137,16 +154,17 @@ const Slider = {
       ...restProps,
       prefixCls,
       tooltipPrefixCls,
-      handle: info => this.handleWithTooltip(tooltipPrefixCls, prefixCls, info),
+      handle: (info: HandleGeneratorInfo) =>
+        this.handleWithTooltip(tooltipPrefixCls, prefixCls, info),
       ref: this.saveSlider,
       onChange: this.handleChange,
     };
     return <VcSlider {...vcSliderProps} />;
   },
-};
+});
 
 /* istanbul ignore next */
-Slider.install = function(app) {
+Slider.install = function(app: App) {
   app.component(Slider.name, Slider);
   return app;
 };
diff --git a/components/slider/style/index.js b/components/slider/style/index.ts
similarity index 100%
rename from components/slider/style/index.js
rename to components/slider/style/index.ts
diff --git a/components/spin/Spin.jsx b/components/spin/Spin.tsx
similarity index 80%
rename from components/spin/Spin.jsx
rename to components/spin/Spin.tsx
index b86d3f1f2..a7f89e8b5 100644
--- a/components/spin/Spin.jsx
+++ b/components/spin/Spin.tsx
@@ -1,11 +1,13 @@
-import { inject, cloneVNode, isVNode } from 'vue';
+import { inject, cloneVNode, isVNode, defineComponent, VNode } from 'vue';
 import debounce from 'lodash-es/debounce';
+import { tuple } from '../_util/type';
 import PropTypes from '../_util/vue-types';
 import BaseMixin from '../_util/BaseMixin';
-import { initDefaultProps, getComponent, getSlot } from '../_util/props-util';
+import { getComponent, getSlot } from '../_util/props-util';
+import initDefaultProps from '../_util/props-util/initDefaultProps';
 import { defaultConfigProvider } from '../config-provider';
 
-export const SpinSize = PropTypes.oneOf(['small', 'default', 'large']);
+export const SpinSize = PropTypes.oneOf(tuple('small', 'default', 'large'));
 
 export const SpinProps = () => ({
   prefixCls: PropTypes.string,
@@ -18,23 +20,18 @@ export const SpinProps = () => ({
 });
 
 // Render indicator
-let defaultIndicator;
+let defaultIndicator: () => VNode = null;
 
-function shouldDelay(spinning, delay) {
+function shouldDelay(spinning?: boolean, delay?: number): boolean {
   return !!spinning && !!delay && !isNaN(Number(delay));
 }
 
-export function setDefaultIndicator(Content) {
+export function setDefaultIndicator(Content: any) {
   const Indicator = Content.indicator;
-  defaultIndicator =
-    typeof Indicator === 'function'
-      ? Indicator
-      : () => {
-          return <Indicator />;
-        };
+  defaultIndicator = typeof Indicator === 'function' ? Indicator : () => <Indicator />;
 }
 
-export default {
+export default defineComponent({
   name: 'ASpin',
   mixins: [BaseMixin],
   inheritAttrs: false,
@@ -45,14 +42,17 @@ export default {
   }),
   setup() {
     return {
+      originalUpdateSpinning: null,
       configProvider: inject('configProvider', defaultConfigProvider),
     };
   },
+  created() {
+    this.originalUpdateSpinning = this.updateSpinning;
+    this.debouncifyUpdateSpinning(this.$props);
+  },
   data() {
     const { spinning, delay } = this;
     const shouldBeDelayed = shouldDelay(spinning, delay);
-    this.originalUpdateSpinning = this.updateSpinning;
-    this.debouncifyUpdateSpinning(this.$props);
     return {
       sSpinning: spinning && !shouldBeDelayed,
     };
@@ -70,7 +70,7 @@ export default {
     this.cancelExistingSpin();
   },
   methods: {
-    debouncifyUpdateSpinning(props) {
+    debouncifyUpdateSpinning(props?: any) {
       const { delay } = props || this.$props;
       if (delay) {
         this.cancelExistingSpin();
@@ -85,11 +85,11 @@ export default {
     },
     cancelExistingSpin() {
       const { updateSpinning } = this;
-      if (updateSpinning && updateSpinning.cancel) {
-        updateSpinning.cancel();
+      if (updateSpinning && (updateSpinning as any).cancel) {
+        (updateSpinning as any).cancel();
       }
     },
-    renderIndicator(prefixCls) {
+    renderIndicator(prefixCls: string) {
       const dotClassName = `${prefixCls}-dot`;
       let indicator = getComponent(this, 'indicator');
       // should not be render default indicator when indicator value is null
@@ -120,7 +120,7 @@ export default {
   render() {
     const { size, prefixCls: customizePrefixCls, tip, wrapperClassName } = this.$props;
     const { class: cls, style, ...divProps } = this.$attrs;
-    const getPrefixCls = this.configProvider.getPrefixCls;
+    const { getPrefixCls } = this.configProvider;
     const prefixCls = getPrefixCls('spin', customizePrefixCls);
 
     const { sSpinning } = this;
@@ -130,7 +130,7 @@ export default {
       [`${prefixCls}-lg`]: size === 'large',
       [`${prefixCls}-spinning`]: sSpinning,
       [`${prefixCls}-show-text`]: !!tip,
-      [cls]: !!cls,
+      [cls as string]: !!cls,
     };
 
     const spinElement = (
@@ -157,4 +157,4 @@ export default {
     }
     return spinElement;
   },
-};
+});
diff --git a/components/spin/index.js b/components/spin/index.ts
similarity index 79%
rename from components/spin/index.js
rename to components/spin/index.ts
index e07e60a0a..2d888ffac 100644
--- a/components/spin/index.js
+++ b/components/spin/index.ts
@@ -1,3 +1,4 @@
+import { App } from 'vue';
 import Spin, { setDefaultIndicator } from './Spin';
 
 export { SpinProps } from './Spin';
@@ -5,7 +6,7 @@ export { SpinProps } from './Spin';
 Spin.setDefaultIndicator = setDefaultIndicator;
 
 /* istanbul ignore next */
-Spin.install = function(app) {
+Spin.install = function(app: App) {
   app.component(Spin.name, Spin);
   return app;
 };
diff --git a/components/spin/style/index.js b/components/spin/style/index.ts
similarity index 100%
rename from components/spin/style/index.js
rename to components/spin/style/index.ts