diff --git a/src/collapse-item/index.tsx b/src/collapse-item/index.tsx
index 7181ab08b..a8c72effa 100644
--- a/src/collapse-item/index.tsx
+++ b/src/collapse-item/index.tsx
@@ -33,7 +33,7 @@ export default createComponent({
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
         console.error(
-          '[Vant] CollapseItem must be a child component of Collapse.'
+          '[Vant] <CollapseItem> must be a child component of <Collapse>.'
         );
       }
       return;
diff --git a/src/dropdown-item/index.tsx b/src/dropdown-item/index.tsx
index 33659233d..b25c6138b 100644
--- a/src/dropdown-item/index.tsx
+++ b/src/dropdown-item/index.tsx
@@ -58,7 +58,7 @@ export default createComponent({
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
         console.error(
-          '[Vant] DropdownItem must be a child component of DropdownMenu.'
+          '[Vant] <DropdownItem> must be a child component of <DropdownMenu>.'
         );
       }
       return;
diff --git a/src/grid-item/index.tsx b/src/grid-item/index.tsx
index a3c4a6b15..3efdcae32 100644
--- a/src/grid-item/index.tsx
+++ b/src/grid-item/index.tsx
@@ -31,7 +31,7 @@ export default createComponent({
 
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
-        console.error('[Vant] GridItem must be a child component of Grid.');
+        console.error('[Vant] <GridItem> must be a child component of <Grid>.');
       }
       return;
     }
diff --git a/src/index-anchor/index.tsx b/src/index-anchor/index.tsx
index 7e1b400e3..5ca88e2cd 100644
--- a/src/index-anchor/index.tsx
+++ b/src/index-anchor/index.tsx
@@ -32,7 +32,7 @@ export default createComponent({
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
         console.error(
-          '[Vant] IndexAnchor must be a child component of IndexBar.'
+          '[Vant] <IndexAnchor> must be a child component of <IndexBar>.'
         );
       }
       return;
diff --git a/src/sidebar-item/index.tsx b/src/sidebar-item/index.tsx
index 3275f1878..fadf6373f 100644
--- a/src/sidebar-item/index.tsx
+++ b/src/sidebar-item/index.tsx
@@ -24,7 +24,7 @@ export default createComponent({
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
         console.error(
-          '[Vant] SidebarItem must be a child component of Sidebar.'
+          '[Vant] <SidebarItem> must be a child component of <Sidebar>.'
         );
       }
       return;
diff --git a/src/step/index.tsx b/src/step/index.tsx
index 00a0c81b6..9c61a91e3 100644
--- a/src/step/index.tsx
+++ b/src/step/index.tsx
@@ -19,7 +19,7 @@ export default createComponent({
 
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
-        console.error('[Vant] Step must be a child component of Steps.');
+        console.error('[Vant] <Step> must be a child component of <Steps>.');
       }
       return;
     }
diff --git a/src/swipe-item/index.tsx b/src/swipe-item/index.tsx
index aa2262fb0..7c37527b4 100644
--- a/src/swipe-item/index.tsx
+++ b/src/swipe-item/index.tsx
@@ -19,7 +19,9 @@ export default createComponent({
 
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
-        console.error('[Vant] SwipeItem must be a child component of Swipe.');
+        console.error(
+          '[Vant] <SwipeItem> must be a child component of <Swipe>.'
+        );
       }
       return;
     }
diff --git a/src/tab/README.md b/src/tab/README.md
index 1bc4bfe0f..fff224c05 100644
--- a/src/tab/README.md
+++ b/src/tab/README.md
@@ -267,11 +267,11 @@ export default {
 
 | Event | Description | Arguments |
 | --- | --- | --- |
-| click | Emitted when a tab is clicked | name，title |
-| change | Emitted when active tab changed | name，title |
-| disabled | Emitted when a disabled tab is clicked | name，title |
-| rendered | Emitted when content first rendered in lazy-render mode | name，title |
-| scroll | Emitted when tab scrolling in sticky mode | object: { scrollTop, isFixed } |
+| click | Emitted when a tab is clicked | _name: string \| number, title: string_ |
+| change | Emitted when active tab changed | _name: string \| number, title: string_ |
+| disabled | Emitted when a disabled tab is clicked | _name: string \| number, title: string_ |
+| rendered | Emitted when content first rendered in lazy-render mode | _name: string \| number, title: string_ |
+| scroll | Emitted when tab scrolling in sticky mode | _{ scrollTop: number, isFixed: boolean }_ |
 
 ### Tabs Methods
 
@@ -280,7 +280,7 @@ Use [ref](https://v3.vuejs.org/guide/component-template-refs.html) to get Tabs i
 | Name | Description | Attribute | Return value |
 | --- | --- | --- | --- |
 | resize | Resize Tabs when container element resized or visibility changed | - | - |
-| scrollTo | Go to specified tab in scrollspy mode | name | - |
+| scrollTo | Go to specified tab in scrollspy mode | _name: string \| number_ | - |
 
 ### Tabs Slots
 
diff --git a/src/tab/README.zh-CN.md b/src/tab/README.zh-CN.md
index 7a704937b..71b072063 100644
--- a/src/tab/README.zh-CN.md
+++ b/src/tab/README.zh-CN.md
@@ -278,11 +278,11 @@ export default {
 
 | 事件名 | 说明 | 回调参数 |
 | --- | --- | --- |
-| click | 点击标签时触发 | name：标识符，title：标题 |
-| change | 当前激活的标签改变时触发 | name：标识符，title：标题 |
-| disabled | 点击被禁用的标签时触发 | name：标识符，title：标题 |
-| rendered | 标签内容首次渲染时触发（仅在开启延迟渲染后触发） | name：标识符，title：标题 |
-| scroll | 滚动时触发，仅在 sticky 模式下生效 | { scrollTop: 距离顶部位置, isFixed: 是否吸顶 } |
+| click | 点击标签时触发 | _name: string \| number, title: string_ |
+| change | 当前激活的标签改变时触发 | _name: string \| number, title: string_ |
+| disabled | 点击被禁用的标签时触发 | _name: string \| number, title: string_ |
+| rendered | 标签内容首次渲染时触发（仅在开启延迟渲染后触发） | _name: string \| number, title: string_ |
+| scroll | 滚动时触发，仅在 sticky 模式下生效 | _{ scrollTop: number, isFixed: boolean }_ |
 
 ### Tabs 方法
 
@@ -291,7 +291,7 @@ export default {
 | 方法名 | 说明 | 参数 | 返回值 |
 | --- | --- | --- | --- |
 | resize | 外层元素大小或组件显示状态变化时，可以调用此方法来触发重绘 | - | - |
-| scrollTo | 滚动到指定的标签页，在滚动导航模式下可用 | name: 标识符 | - |
+| scrollTo | 滚动到指定的标签页，在滚动导航模式下可用 | _name: string \| number_ | - |
 
 ### Tabs Slots
 
diff --git a/src/tab/index.js b/src/tab/index.tsx
similarity index 80%
rename from src/tab/index.js
rename to src/tab/index.tsx
index eac84aa5d..be204b8da 100644
--- a/src/tab/index.js
+++ b/src/tab/index.tsx
@@ -1,6 +1,6 @@
-import { ref, watch, nextTick } from 'vue';
+import { ref, watch, nextTick, PropType, CSSProperties } from 'vue';
 import { createNamespace, UnknownProp } from '../utils';
-import { TABS_KEY } from '../tabs';
+import { TABS_KEY, TabsProvide } from '../tabs';
 
 // Composition
 import { useParent } from '@vant/use';
@@ -20,15 +20,18 @@ export default createComponent({
     title: String,
     disabled: Boolean,
     titleClass: UnknownProp,
-    titleStyle: null,
+    titleStyle: [String, Object] as PropType<string | CSSProperties>,
   },
 
   setup(props, { slots }) {
     const inited = ref(false);
-    const { parent, index } = useParent(TABS_KEY);
+    const { parent, index } = useParent<TabsProvide>(TABS_KEY);
 
     if (!parent) {
-      throw new Error('[Vant] Tabs: <van-tab> must be used inside <van-tabs>');
+      if (process.env.NODE_ENV !== 'production') {
+        console.error('[Vant] <Tab> must be a child component of <Tabs>.');
+      }
+      return;
     }
 
     const getName = () => props.name ?? index.value;
@@ -38,7 +41,7 @@ export default createComponent({
 
       if (parent.props.lazyRender) {
         nextTick(() => {
-          parent.emit('rendered', getName(), props.title);
+          parent.onRendered(getName(), props.title);
         });
       }
     };
diff --git a/src/tabbar-item/index.tsx b/src/tabbar-item/index.tsx
index 11aa73fd6..9a8c6a40f 100644
--- a/src/tabbar-item/index.tsx
+++ b/src/tabbar-item/index.tsx
@@ -33,7 +33,9 @@ export default createComponent({
 
     if (!parent) {
       if (process.env.NODE_ENV !== 'production') {
-        console.error('[Vant] TabbarItem must be a child component of Tabbar.');
+        console.error(
+          '[Vant] <TabbarItem> must be a child component of <Tabbar>.'
+        );
       }
       return;
     }
diff --git a/src/tabs/index.js b/src/tabs/index.tsx
similarity index 81%
rename from src/tabs/index.js
rename to src/tabs/index.tsx
index 1b77ec258..88e01f285 100644
--- a/src/tabs/index.js
+++ b/src/tabs/index.tsx
@@ -1,4 +1,15 @@
-import { ref, watch, computed, reactive, nextTick, onActivated } from 'vue';
+import {
+  ref,
+  watch,
+  computed,
+  reactive,
+  nextTick,
+  PropType,
+  ComputedRef,
+  onActivated,
+  CSSProperties,
+  ComponentPublicInstance,
+} from 'vue';
 
 // Utils
 import {
@@ -11,10 +22,11 @@ import {
   createNamespace,
   getVisibleHeight,
   setRootScrollTop,
+  ComponentInstance,
 } from '../utils';
 import { scrollLeftTo, scrollTopTo } from './utils';
 import { BORDER_TOP_BOTTOM } from '../utils/constant';
-import { callInterceptor } from '../utils/interceptor';
+import { callInterceptor, Interceptor } from '../utils/interceptor';
 
 // Composition
 import {
@@ -24,7 +36,7 @@ import {
   useEventListener,
   onMountedOrActivated,
 } from '@vant/use';
-import { route } from '../composables/use-route';
+import { route, RouteProps } from '../composables/use-route';
 import { useRefs } from '../composables/use-refs';
 import { useExpose } from '../composables/use-expose';
 
@@ -37,6 +49,21 @@ const [createComponent, bem] = createNamespace('tabs');
 
 export const TABS_KEY = 'vanTabs';
 
+export type TabType = 'line' | 'card';
+
+export type TabsProvide = {
+  props: {
+    animated?: boolean;
+    swipeable?: boolean;
+    scrollspy?: boolean;
+    lazyRender: boolean;
+  };
+  setLine: () => void;
+  onRendered: (name: string | number, title?: string) => void;
+  scrollIntoView: (immediate?: boolean) => void;
+  currentName: ComputedRef<number | string | undefined>;
+};
+
 export default createComponent({
   props: {
     color: String,
@@ -48,11 +75,11 @@ export default createComponent({
     background: String,
     lineWidth: [Number, String],
     lineHeight: [Number, String],
-    beforeChange: Function,
+    beforeChange: Function as PropType<Interceptor>,
     titleActiveColor: String,
     titleInactiveColor: String,
     type: {
-      type: String,
+      type: String as PropType<TabType>,
       default: 'line',
     },
     active: {
@@ -84,18 +111,18 @@ export default createComponent({
   emits: ['click', 'change', 'scroll', 'disabled', 'rendered', 'update:active'],
 
   setup(props, { emit, slots }) {
-    let tabHeight;
-    let lockScroll;
-    let stickyFixed;
+    let tabHeight: number;
+    let lockScroll: boolean;
+    let stickyFixed: boolean;
 
-    const root = ref();
-    const navRef = ref();
-    const wrapRef = ref();
+    const root = ref<HTMLElement>();
+    const navRef = ref<HTMLElement>();
+    const wrapRef = ref<HTMLElement>();
 
     const windowSize = useWindowSize();
     const scroller = useScrollParent(root);
-    const [titleRefs, setTitleRefs] = useRefs();
-    const { children, linkChildren } = useChildren(TABS_KEY);
+    const [titleRefs, setTitleRefs] = useRefs<ComponentInstance>();
+    const { children, linkChildren } = useChildren<ComponentInstance>(TABS_KEY);
 
     const state = reactive({
       inited: false,
@@ -103,7 +130,7 @@ export default createComponent({
       currentIndex: -1,
       lineStyle: {
         backgroundColor: props.color,
-      },
+      } as CSSProperties,
     });
 
     // whether the nav is scrollable
@@ -116,7 +143,10 @@ export default createComponent({
       background: props.background,
     }));
 
-    const getTabName = (tab, index) => tab.name ?? index;
+    const getTabName = (
+      tab: ComponentInstance,
+      index: number
+    ): number | string => tab.name ?? index;
 
     const currentName = computed(() => {
       const activeTab = children[state.currentIndex];
@@ -136,11 +166,11 @@ export default createComponent({
     });
 
     // scroll active tab into view
-    const scrollIntoView = (immediate) => {
+    const scrollIntoView = (immediate?: boolean) => {
       const nav = navRef.value;
       const titles = titleRefs.value;
 
-      if (!scrollable.value || !titles || !titles[state.currentIndex]) {
+      if (!scrollable.value || !nav || !titles || !titles[state.currentIndex]) {
         return;
       }
 
@@ -161,7 +191,7 @@ export default createComponent({
           !titles ||
           !titles[state.currentIndex] ||
           props.type !== 'line' ||
-          isHidden(root.value)
+          isHidden(root.value!)
         ) {
           return;
         }
@@ -170,7 +200,7 @@ export default createComponent({
         const { lineWidth, lineHeight } = props;
         const left = title.offsetLeft + title.offsetWidth / 2;
 
-        const lineStyle = {
+        const lineStyle: CSSProperties = {
           width: addUnit(lineWidth),
           backgroundColor: props.color,
           transform: `translateX(${left}px) translateX(-50%)`,
@@ -190,7 +220,7 @@ export default createComponent({
       });
     };
 
-    const findAvailableTab = (index) => {
+    const findAvailableTab = (index: number) => {
       const diff = index < state.currentIndex ? -1 : 1;
 
       while (index >= 0 && index < children.length) {
@@ -202,7 +232,7 @@ export default createComponent({
       }
     };
 
-    const setCurrentIndex = (currentIndex) => {
+    const setCurrentIndex = (currentIndex: number) => {
       const newIndex = findAvailableTab(currentIndex);
 
       if (!isDef(newIndex)) {
@@ -225,7 +255,7 @@ export default createComponent({
     };
 
     // correct the index of active tab
-    const setCurrentIndexByName = (name) => {
+    const setCurrentIndexByName = (name: number | string) => {
       const matched = children.filter(
         (tab, index) => getTabName(tab, index) === name
       );
@@ -238,7 +268,7 @@ export default createComponent({
       if (props.scrollspy) {
         const target = children[state.currentIndex].$el;
 
-        if (target) {
+        if (target && scroller.value) {
           const to = getElementTop(target, scroller.value) - scrollOffset.value;
 
           lockScroll = true;
@@ -255,7 +285,7 @@ export default createComponent({
     };
 
     // emit event when clicked
-    const onClick = (item, index) => {
+    const onClick = (item: ComponentInstance, index: number) => {
       const { title, disabled } = children[index];
       const name = getTabName(children[index], index);
 
@@ -272,16 +302,19 @@ export default createComponent({
         });
 
         emit('click', name, title);
-        route(item);
+        route(item as ComponentPublicInstance<RouteProps>);
       }
     };
 
-    const onStickyScroll = (params) => {
+    const onStickyScroll = (params: {
+      isFixed: boolean;
+      scrollTop: number;
+    }) => {
       stickyFixed = params.isFixed;
       emit('scroll', params);
     };
 
-    const scrollTo = (name) => {
+    const scrollTo = (name: number | string) => {
       nextTick(() => {
         setCurrentIndexByName(name);
         scrollToCurrentContent(true);
@@ -390,7 +423,7 @@ export default createComponent({
         // scroll to correct position
         if (stickyFixed && !props.scrollspy) {
           setRootScrollTop(
-            Math.ceil(getElementTop(root.value) - offsetTopPx.value)
+            Math.ceil(getElementTop(root.value!) - offsetTopPx.value)
           );
         }
       }
@@ -400,11 +433,15 @@ export default createComponent({
       setCurrentIndexByName(props.active);
       nextTick(() => {
         state.inited = true;
-        tabHeight = getVisibleHeight(wrapRef.value);
+        tabHeight = getVisibleHeight(wrapRef.value!);
         scrollIntoView(true);
       });
     };
 
+    const onRendered = (name: string | number, title?: string) => {
+      emit('rendered', name, title);
+    };
+
     useExpose({
       resize: setLine,
       scrollTo,
@@ -415,9 +452,9 @@ export default createComponent({
     useEventListener('scroll', onScroll, { target: scroller.value });
 
     linkChildren({
-      emit,
       props,
       setLine,
+      onRendered,
       currentName,
       scrollIntoView,
     });
diff --git a/src/tabs/utils.ts b/src/tabs/utils.ts
index 2477dd899..aaee7e228 100644
--- a/src/tabs/utils.ts
+++ b/src/tabs/utils.ts
@@ -1,5 +1,5 @@
 import { raf, cancelRaf } from '@vant/use';
-import { getScrollTop, setScrollTop } from '../utils';
+import { ScrollElement, getScrollTop, setScrollTop } from '../utils';
 
 let rafId: number;
 
@@ -26,7 +26,7 @@ export function scrollLeftTo(
 }
 
 export function scrollTopTo(
-  scroller: HTMLElement,
+  scroller: ScrollElement,
   to: number,
   duration: number,
   callback: () => void
diff --git a/src/utils/dom/scroll.ts b/src/utils/dom/scroll.ts
index 61c8ac8c0..3d2cf6312 100644
--- a/src/utils/dom/scroll.ts
+++ b/src/utils/dom/scroll.ts
@@ -1,6 +1,6 @@
 import { isIOS as checkIsIOS } from '../validate/system';
 
-type ScrollElement = Element | Window;
+export type ScrollElement = Element | Window;
 
 function isWindow(val: unknown): val is Window {
   return val === window;
@@ -36,7 +36,7 @@ export function setRootScrollTop(value: number) {
 }
 
 // get distance from element top to page top or scroller top
-export function getElementTop(el: ScrollElement, scroller?: HTMLElement) {
+export function getElementTop(el: ScrollElement, scroller?: ScrollElement) {
   if (isWindow(el)) {
     return 0;
   }
diff --git a/src/vue-tsx-shim.d.ts b/src/vue-tsx-shim.d.ts
index 546357ef7..334a49c3a 100644
--- a/src/vue-tsx-shim.d.ts
+++ b/src/vue-tsx-shim.d.ts
@@ -20,9 +20,10 @@ declare module 'vue' {
     onPress?: EventHandler;
     onScale?: EventHandler;
     onCancel?: EventHandler;
-    onOpened?: EventHandler;
     onClosed?: EventHandler;
     onChange?: EventHandler;
+    onOpened?: EventHandler;
+    onScroll?: EventHandler;
     onSubmit?: EventHandler;
     onSelect?: EventHandler;
     onToggle?: EventHandler;