diff --git a/libs/horizon/src/dom/DOMExternal.ts b/libs/horizon/src/dom/DOMExternal.ts
index 237e8de2..e9404cb7 100644
--- a/libs/horizon/src/dom/DOMExternal.ts
+++ b/libs/horizon/src/dom/DOMExternal.ts
@@ -10,30 +10,6 @@ import {findDOMByClassInst} from '../renderer/vnode/VNodeUtils';
 import {TreeRoot} from '../renderer/vnode/VNodeTags';
 import {Callback} from '../renderer/UpdateHandler';
 
-function executeRender(
-  children: any,
-  container: Container,
-  callback?: Callback,
-) {
-  let treeRoot = container._treeRoot;
-
-  if (!treeRoot) {
-    treeRoot = createRoot(children, container, callback);
-  } else { // container被render过
-    if (typeof callback === 'function') {
-      const cb = callback;
-      callback = function () {
-        const instance = getFirstCustomDom(treeRoot);
-        cb.call(instance);
-      };
-    }
-    // 执行更新操作
-    startUpdate(children, treeRoot, callback);
-  }
-
-  return getFirstCustomDom(treeRoot);
-}
-
 function createRoot(children: any, container: Container, callback?: Callback) {
   // 清空容器
   let child = container.lastChild;
@@ -66,7 +42,31 @@ function createRoot(children: any, container: Container, callback?: Callback) {
   return treeRoot;
 }
 
-function findDOMNode(domOrEle: Element): null | Element | Text {
+function executeRender(
+  children: any,
+  container: Container,
+  callback?: Callback,
+) {
+  let treeRoot = container._treeRoot;
+
+  if (!treeRoot) {
+    treeRoot = createRoot(children, container, callback);
+  } else { // container被render过
+    if (typeof callback === 'function') {
+      const cb = callback;
+      callback = function () {
+        const instance = getFirstCustomDom(treeRoot);
+        cb.call(instance);
+      };
+    }
+    // 执行更新操作
+    startUpdate(children, treeRoot, callback);
+  }
+
+  return getFirstCustomDom(treeRoot);
+}
+
+function findDOMNode(domOrEle?: Element): null | Element | Text {
   if (domOrEle == null) {
     return null;
   }
diff --git a/libs/horizon/src/dom/DOMInternalKeys.ts b/libs/horizon/src/dom/DOMInternalKeys.ts
index dec6fed1..2be5522e 100644
--- a/libs/horizon/src/dom/DOMInternalKeys.ts
+++ b/libs/horizon/src/dom/DOMInternalKeys.ts
@@ -24,11 +24,12 @@ const internalKeys = {
 };
 
 // 通过 VNode 实例获取 DOM 节点
-export function getDom(vNode: VNode): Element | Text | void {
+export function getDom(vNode: VNode): Element | Text | null {
   const {tag} = vNode;
   if (tag === DomComponent || tag === DomText) {
     return vNode.realNode;
   }
+  return null;
 }
 
 // 将 VNode 属性相关信息挂到 DOM 对象的特定属性上
@@ -72,7 +73,7 @@ export function getNearestVNode(dom: Node): null | VNode {
 }
 
 // 获取 vNode 上的属性相关信息
-export function getVNodeProps(dom: Element | Text): Props {
+export function getVNodeProps(dom: Element | Text): Props | null{
   return dom[internalKeys.props] || null;
 }
 
@@ -93,7 +94,8 @@ export function getEventListeners(dom: EventTarget): Set<string> {
 export function getEventToListenerMap(target: EventTarget): Map<string, EventListener> {
   let eventsMap = target[internalKeys.nonDelegatedEvents];
   if (!eventsMap) {
-    eventsMap = target[internalKeys.nonDelegatedEvents] = new Map();
+    eventsMap = new Map();
+    target[internalKeys.nonDelegatedEvents] = eventsMap;
   }
   return eventsMap;
 }
diff --git a/libs/horizon/src/dom/DOMOperator.ts b/libs/horizon/src/dom/DOMOperator.ts
index b475375a..cc023da9 100644
--- a/libs/horizon/src/dom/DOMOperator.ts
+++ b/libs/horizon/src/dom/DOMOperator.ts
@@ -5,13 +5,13 @@ import {
 import {
   createDom,
 } from './utils/DomCreator';
-import {getSelectionInfo, resetSelectionRange, selectionData} from './SelectionRangeHandler';
-import {isElement, isComment, isDocument, isDocumentFragment, getDomTag, shouldAutoFocus} from './utils/Common';
-import {NSS} from './utils/DomCreator';
-import {adjustStyleValue} from './DOMPropertiesHandler/StyleHandler';
+import { getSelectionInfo, resetSelectionRange, SelectionData } from './SelectionRangeHandler';
+import { isElement, isComment, isDocument, isDocumentFragment, getDomTag, shouldAutoFocus } from './utils/Common';
+import { NSS } from './utils/DomCreator';
+import { adjustStyleValue } from './DOMPropertiesHandler/StyleHandler';
 
-import {listenDelegatedEvents} from '../event/EventBinding';
-import type {VNode} from '../renderer/Types';
+import { listenDelegatedEvents } from '../event/EventBinding';
+import type { VNode } from '../renderer/Types';
 import {
   setInitValue,
   getPropsWithoutValue,
@@ -21,10 +21,10 @@ import {
   compareProps,
   setDomProps, updateDomProps
 } from './DOMPropertiesHandler/DOMPropertiesHandler';
-import {isNativeElement, validateProps} from './validators/ValidateProps';
-import {watchValueChange} from './valueHandler/ValueChangeHandler';
-import {DomComponent, DomText} from '../renderer/vnode/VNodeTags';
-import {updateCommonProp} from './DOMPropertiesHandler/UpdateCommonProp';
+import { isNativeElement, validateProps } from './validators/ValidateProps';
+import { watchValueChange } from './valueHandler/ValueChangeHandler';
+import { DomComponent, DomText } from '../renderer/vnode/VNodeTags';
+import { updateCommonProp } from './DOMPropertiesHandler/UpdateCommonProp';
 
 export type Props = {
   autoFocus?: boolean;
@@ -37,7 +37,7 @@ export type Props = {
 
 export type Container = (Element & { _treeRoot?: VNode }) | (Document & { _treeRoot?: VNode });
 
-let selectionInfo: null | selectionData = null;
+let selectionInfo: null | SelectionData = null;
 
 function getChildNS(parentNS: string | null, tagName: string): string {
   if (parentNS === NSS.svg && tagName === 'foreignObject') {
@@ -54,18 +54,12 @@ function getChildNS(parentNS: string | null, tagName: string): string {
 }
 
 // 获取容器
-export function getNSCtx(dom: Container, parentNS: string, type: string): string {
-  let namespace;
-  if (dom) {
-    namespace = getChildNS(dom.namespaceURI ?? null, dom.nodeName);
-  } else {
-    namespace = getChildNS(parentNS, type);
-  }
-  return namespace;
+export function getNSCtx(parentNS: string, type: string, dom?: Container): string {
+  return dom ? getChildNS(dom.namespaceURI ?? null, dom.nodeName) : getChildNS(parentNS, type);
 }
 
 export function prepareForSubmit(): void {
-  selectionInfo = <selectionData>getSelectionInfo();
+  selectionInfo = <SelectionData>getSelectionInfo();
 }
 
 export function resetAfterSubmit(): void {
@@ -156,7 +150,7 @@ export function newTextDom(
 // 提交vNode的类型为Component或者Text的更新
 export function submitDomUpdate(tag: string, vNode: VNode) {
   const newProps = vNode.props;
-  const element: Element = vNode.realNode;
+  const element: Element | null = vNode.realNode;
 
   if (tag === DomComponent) {
     // DomComponent类型
@@ -179,8 +173,10 @@ export function submitDomUpdate(tag: string, vNode: VNode) {
       }
     }
   } else if (tag === DomText) {
-    // text类型
-    element.textContent = newProps;
+    if (element != null) {
+      // text类型
+      element.textContent = newProps;
+    }
   }
 }
 
diff --git a/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts b/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
index 3d5f7d36..5ec79c33 100644
--- a/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
+++ b/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
@@ -8,37 +8,7 @@ import {
 } from '../../event/EventBinding';
 import { isEventProp, isNativeElement } from '../validators/ValidateProps';
 
-// 初始化DOM属性
-export function setDomProps(
-  tagName: string,
-  dom: Element,
-  props: Object,
-): void {
-  const isNativeTag = isNativeElement(tagName, props);
-  const keysOfProps = Object.keys(props);
-
-  for (let i = 0; i < keysOfProps.length; i++) {
-    const propName = keysOfProps[i];
-    const propVal = props[propName];
-
-    updateOneProp(dom, propName, propVal, isNativeTag, true);
-  }
-}
-
-// 更新 DOM 属性
-export function updateDomProps(
-  dom: Element,
-  changeList: Array<any>,
-  isNativeTag: boolean,
-): void {
-  for (let i = 0; i < changeList.length; i++) {
-    const { propName, propVal } = changeList[i];
-
-    updateOneProp(dom, propName, propVal, isNativeTag);
-  }
-}
-
-function updateOneProp(dom, propName, propVal, isNativeTag, isInit?: boolean) {
+function updateOneProp(dom, propName, isNativeTag, propVal?, isInit?: boolean) {
   if (propName === 'style') {
     setStyles(dom, propVal);
   } else if (propName === 'dangerouslySetInnerHTML') {
@@ -59,6 +29,36 @@ function updateOneProp(dom, propName, propVal, isNativeTag, isInit?: boolean) {
   }
 }
 
+// 初始化DOM属性
+export function setDomProps(
+  tagName: string,
+  dom: Element,
+  props: Object,
+): void {
+  const isNativeTag = isNativeElement(tagName, props);
+  const keysOfProps = Object.keys(props);
+
+  for (let i = 0; i < keysOfProps.length; i++) {
+    const propName = keysOfProps[i];
+    const propVal = props[propName];
+
+    updateOneProp(dom, propName, isNativeTag, propVal, true);
+  }
+}
+
+// 更新 DOM 属性
+export function updateDomProps(
+  dom: Element,
+  changeList: Array<any>,
+  isNativeTag: boolean,
+): void {
+  for (let i = 0; i < changeList.length; i++) {
+    const { propName, propVal } = changeList[i];
+
+    updateOneProp(dom, propName, isNativeTag, propVal);
+  }
+}
+
 // 找出两个 DOM 属性的差别，生成需要更新的属性集合
 export function compareProps(
   oldProps: Object,
@@ -111,7 +111,7 @@ export function compareProps(
   for (let i = 0; i < keysOfNewProps.length; i++) {
     const propName = keysOfNewProps[i];
     const newPropValue = newProps[propName];
-    const oldPropValue = oldProps != null ? oldProps[propName] : undefined;
+    const oldPropValue = oldProps != null ? oldProps[propName] : null;
 
     if (newPropValue === oldPropValue || (newPropValue == null && oldPropValue == null)) {
       // 新旧属性值未发生变化，或者新旧属性皆为空值，不需要进行处理
diff --git a/libs/horizon/src/dom/DOMPropertiesHandler/StyleHandler.ts b/libs/horizon/src/dom/DOMPropertiesHandler/StyleHandler.ts
index 23e1b91c..49429fbe 100644
--- a/libs/horizon/src/dom/DOMPropertiesHandler/StyleHandler.ts
+++ b/libs/horizon/src/dom/DOMPropertiesHandler/StyleHandler.ts
@@ -1,3 +1,31 @@
+function isNeedUnitCSS(propName: string) {
+  return !(noUnitCSS.includes(propName)
+    || propName.startsWith('borderImage')
+    || propName.startsWith('flex')
+    || propName.startsWith('gridRow')
+    || propName.startsWith('gridColumn')
+    || propName.startsWith('stroke')
+    || propName.startsWith('box')
+    || propName.endsWith('Opacity'));
+}
+
+/**
+ * 对一些没有写单位的样式进行适配，例如：width: 10 => width: 10px
+ * 对空值或布尔值进行适配，转为空字符串
+ * 去掉多余空字符
+ */
+ export function adjustStyleValue(name, value) {
+  let validValue = value;
+
+  if (typeof value === 'number' && value !== 0 && isNeedUnitCSS(name)) {
+    validValue = `${value}px`;
+  } else if (value === '' || value == null || typeof value === 'boolean') {
+    validValue = '';
+  }
+
+  return validValue;
+}
+
 /**
  * 设置 DOM 节点的 style 属性
  */
@@ -21,31 +49,3 @@ export function setStyles(dom, styles) {
  */
 const noUnitCSS = ['animationIterationCount', 'columnCount', 'columns', 'gridArea', 'fontWeight', 'lineClamp',
   'lineHeight', 'opacity', 'order', 'orphans', 'tabSize', 'widows', 'zIndex', 'zoom'];
-
-function isNeedUnitCSS(propName: string) {
-  return !(noUnitCSS.includes(propName)
-    || propName.startsWith('borderImage')
-    || propName.startsWith('flex')
-    || propName.startsWith('gridRow')
-    || propName.startsWith('gridColumn')
-    || propName.startsWith('stroke')
-    || propName.startsWith('box')
-    || propName.endsWith('Opacity'));
-}
-
-/**
- * 对一些没有写单位的样式进行适配，例如：width: 10 => width: 10px
- * 对空值或布尔值进行适配，转为空字符串
- * 去掉多余空字符
- */
-export function adjustStyleValue(name, value) {
-  let validValue = value;
-
-  if (typeof value === 'number' && value !== 0 && isNeedUnitCSS(name)) {
-    validValue = `${value}px`;
-  } else if (value === '' || value == null || typeof value === 'boolean') {
-    validValue = '';
-  }
-
-  return validValue;
-}
diff --git a/libs/horizon/src/dom/DOMPropertiesHandler/UpdateCommonProp.ts b/libs/horizon/src/dom/DOMPropertiesHandler/UpdateCommonProp.ts
index e9a6fce1..5af59913 100644
--- a/libs/horizon/src/dom/DOMPropertiesHandler/UpdateCommonProp.ts
+++ b/libs/horizon/src/dom/DOMPropertiesHandler/UpdateCommonProp.ts
@@ -14,9 +14,15 @@ const svgHumpAttr = new Set(['allowReorder', 'autoReverse', 'baseFrequency', 'ba
       'maskContentUnits', 'maskUnits', 'numOctaves', 'pathLength', 'patternContentUnits', 'patternTransform,',
       'patternUnits', 'pointsAtX', 'pointsAtY', 'pointsAtZ', 'preserveAlpha', 'preserveAspectRatio', 'primitiveUnits',
       'referrerPolicy', 'refX', 'refY', 'repeatCount', 'repeatDur', 'requiredExtensions', 'requiredFeatures',
-      'specularConstant', 'specularExponent', 'spreadMethod', 'startOffset', 'stdDeviation', 'stitchTiles', 'surfaceScale',
-      'systemLanguage', 'tableValues', 'targetX', 'targetY', 'textLength', 'viewBox', 'viewTarget', 'xChannelSelector',
-      'yChannelSelector', 'zoomAndPan']);
+      'specularConstant', 'specularExponent', 'spreadMethod', 'startOffset', 'stdDeviation',
+      'stitchTiles', 'surfaceScale','systemLanguage', 'tableValues', 'targetX', 'targetY',
+      'textLength','viewBox', 'viewTarget', 'xChannelSelector','yChannelSelector', 'zoomAndPan']);
+
+// 驼峰 变 “-”
+function convertToLowerCase(str) {
+  const replacer = (match, char) => `-${char.toLowerCase()}`;
+  return str.replace(/([A-Z])/g, replacer);
+}
 
 /**
  * 给 dom 设置属性
@@ -70,12 +76,3 @@ export function updateCommonProp(dom: Element, attrName: string, value: any, isN
     }
   }
 }
-
-// 驼峰 变 “-”
-function convertToLowerCase(str) {
-  const replacer = (match, char) => {
-    return `-${char.toLowerCase()}`;
-  }
-
-  return str.replace(/([A-Z])/g, replacer);
-};
diff --git a/libs/horizon/src/dom/SelectionRangeHandler.ts b/libs/horizon/src/dom/SelectionRangeHandler.ts
index f5bde5bf..284faa41 100644
--- a/libs/horizon/src/dom/SelectionRangeHandler.ts
+++ b/libs/horizon/src/dom/SelectionRangeHandler.ts
@@ -105,16 +105,16 @@ export function getSelectionInfo() {
   };
 }
 
-export interface selectionData {
+export interface SelectionData {
   focusedDom: HTMLInputElement | HTMLTextAreaElement | void;
-  selectionRange: {
+  selectionRange?: {
     start: number;
     end: number;
-  }
-};
+  };
+}
 
 // 防止选择范围内的信息因为节点删除或其他原因导致的信息丢失
-export function resetSelectionRange(preSelectionRangeData: selectionData) {
+export function resetSelectionRange(preSelectionRangeData: SelectionData) {
   // 当前 focus 的元素
   const currentFocusedDom = getIFrameFocusedDom();
 
diff --git a/libs/horizon/src/dom/utils/Interface.ts b/libs/horizon/src/dom/utils/Interface.ts
index 62887f72..2306d4b3 100644
--- a/libs/horizon/src/dom/utils/Interface.ts
+++ b/libs/horizon/src/dom/utils/Interface.ts
@@ -1,9 +1,9 @@
 export interface IProperty {
-  [propName: string]: any
+  [propName: string]: any;
 }
 
 export interface HorizonSelect extends HTMLSelectElement {
-  _multiple: boolean;
+  _multiple?: boolean;
 }
 
 export type HorizonDom = Element | HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement;
diff --git a/libs/horizon/src/dom/validators/PropertiesData.ts b/libs/horizon/src/dom/validators/PropertiesData.ts
index c11e5fdf..70645aae 100644
--- a/libs/horizon/src/dom/validators/PropertiesData.ts
+++ b/libs/horizon/src/dom/validators/PropertiesData.ts
@@ -6,19 +6,15 @@ export enum PROPERTY_TYPE {
   STRING, // 普通的字符串类型
   SPECIAL, // 需要特殊处理的属性类型
   BOOLEAN_STR, // 字符串类型的 true false
-};
+}
 
 export type PropDetails = {
-  propName: string,
-  type: PROPERTY_TYPE,
-  attrName: string,
-  attrNS: string | null,
+  propName: string;
+  type: PROPERTY_TYPE;
+  attrName: string;
+  attrNS: string | null;
 };
 
-export function getPropDetails(name: string): PropDetails | null {
-  return propsDetailData[name] || null;
-}
-
 // 属性相关数据
 // 依次为 propertyName、type、attributeName、attributeNamespace，不填则使用默认值
 // type 默认 STRING
@@ -123,3 +119,7 @@ propertiesData.forEach(record => {
     attrNS,
   };
 });
+
+export function getPropDetails(name: string): PropDetails | null {
+  return propsDetailData[name] || null;
+}
diff --git a/libs/horizon/src/dom/validators/ValidateProps.ts b/libs/horizon/src/dom/validators/ValidateProps.ts
index dddd8175..5616f342 100644
--- a/libs/horizon/src/dom/validators/ValidateProps.ts
+++ b/libs/horizon/src/dom/validators/ValidateProps.ts
@@ -34,6 +34,11 @@ function isInvalidBoolean(
   return false;
 }
 
+// 是事件属性
+export function isEventProp(propName) {
+  return propName.substr(0, 2) === 'on';
+}
+
 function isValidProp(tagName, name, value) {
   // 校验事件名称
   if (isEventProp(name)) {
@@ -79,11 +84,6 @@ export function isInvalidValue(
   return false;
 }
 
-// 是事件属性
-export function isEventProp(propName) {
-  return propName.substr(0, 2) === 'on';
-}
-
 // dev模式下校验属性是否合法
 export function validateProps(type, props) {
   if (!props) {
diff --git a/libs/horizon/src/dom/valueHandler/SelectValueHandler.ts b/libs/horizon/src/dom/valueHandler/SelectValueHandler.ts
index 6602e876..75812620 100644
--- a/libs/horizon/src/dom/valueHandler/SelectValueHandler.ts
+++ b/libs/horizon/src/dom/valueHandler/SelectValueHandler.ts
@@ -1,14 +1,5 @@
 import {HorizonSelect, IProperty} from '../utils/Interface';
 
-// 更新 <option>
-function updateValue(options, newValues: any, isMultiple: boolean) {
-  if (isMultiple) {
-    updateMultipleValue(options, newValues);
-  } else {
-    updateSingleValue(options, newValues);
-  }
-}
-
 function updateMultipleValue(options, newValues) {
   const newValueSet = new Set();
 
@@ -39,6 +30,15 @@ function updateSingleValue(options, newValue) {
   }
 }
 
+// 更新 <option>
+function updateValue(options, newValues: any, isMultiple: boolean) {
+  if (isMultiple) {
+    updateMultipleValue(options, newValues);
+  } else {
+    updateSingleValue(options, newValues);
+  }
+}
+
 export function getSelectPropsWithoutValue(dom: HorizonSelect, properties: Object) {
   return {
     ...properties,
diff --git a/libs/horizon/src/event/HorizonEventMain.ts b/libs/horizon/src/event/HorizonEventMain.ts
index 1ee6ba8b..ad3dffda 100644
--- a/libs/horizon/src/event/HorizonEventMain.ts
+++ b/libs/horizon/src/event/HorizonEventMain.ts
@@ -1,5 +1,5 @@
-import type {AnyNativeEvent, ProcessingListenerList} from './types';
-import type {VNode} from '../renderer/Types';
+import type { AnyNativeEvent, ProcessingListenerList } from './types';
+import type { VNode } from '../renderer/Types';
 
 import {
   CommonEventToHorizonMap,
@@ -11,20 +11,20 @@ import {
   throwCaughtEventError,
   runListenerAndCatchFirstError,
 } from './EventError';
-import {getListeners as getBeforeInputListeners} from './simulatedEvtHandler/BeforeInputEventHandler';
-import {getListeners as getCompositionListeners} from './simulatedEvtHandler/CompositionEventHandler';
-import {getListeners as getChangeListeners} from './simulatedEvtHandler/ChangeEventHandler';
-import {getListeners as getSelectionListeners} from './simulatedEvtHandler/SelectionEventHandler';
+import { getListeners as getBeforeInputListeners } from './simulatedEvtHandler/BeforeInputEventHandler';
+import { getListeners as getCompositionListeners } from './simulatedEvtHandler/CompositionEventHandler';
+import { getListeners as getChangeListeners } from './simulatedEvtHandler/ChangeEventHandler';
+import { getListeners as getSelectionListeners } from './simulatedEvtHandler/SelectionEventHandler';
 import {
   getCustomEventNameWithOn,
   uniqueCharCode,
   getEventTarget
 } from './utils';
-import {createCommonCustomEvent} from './customEvents/EventFactory';
-import {getListenersFromTree} from './ListenerGetter';
-import {shouldUpdateValue, updateControlledValue} from './ControlledValueUpdater';
-import {asyncUpdates, runDiscreteUpdates} from '../renderer/Renderer';
-import {getExactNode} from '../renderer/vnode/VNodeUtils';
+import { createCommonCustomEvent } from './customEvents/EventFactory';
+import { getListenersFromTree } from './ListenerGetter';
+import { shouldUpdateValue, updateControlledValue } from './ControlledValueUpdater';
+import { asyncUpdates, runDiscreteUpdates } from '../renderer/Renderer';
+import { getExactNode } from '../renderer/vnode/VNodeUtils';
 
 // 获取事件触发的普通事件监听方法队列
 function getCommonListeners(
@@ -61,7 +61,7 @@ function getCommonListeners(
     vNode,
     customEventName,
     customEvent,
-    isCapture ? EVENT_TYPE_CAPTURE: EVENT_TYPE_BUBBLE,
+    isCapture ? EVENT_TYPE_CAPTURE : EVENT_TYPE_BUBBLE,
   );
 }
 
@@ -72,7 +72,7 @@ export function processListeners(
   processingEventsList.forEach(eventUnitList => {
     let lastVNode;
     eventUnitList.forEach(eventUnit => {
-      const {vNode, currentTarget, listener, event} = eventUnit;
+      const { vNode, currentTarget, listener, event } = eventUnit;
       if (vNode !== lastVNode && event.isPropagationStopped()) {
         return;
       }
@@ -122,7 +122,9 @@ function getProcessListenersFacade(
       ));
     }
 
-    if (nativeEvtName === 'compositionend' || nativeEvtName === 'compositionstart' || nativeEvtName === 'compositionupdate') {
+    if (nativeEvtName === 'compositionend' ||
+        nativeEvtName === 'compositionstart' ||
+        nativeEvtName === 'compositionupdate') {
       processingListenerList = processingListenerList.concat(getCompositionListeners(
         nativeEvtName,
         nativeEvent,
@@ -151,7 +153,12 @@ function triggerHorizonEvents(
   vNode: null | VNode,
 ): void {
   const nativeEventTarget = getEventTarget(nativeEvent);
-  const processingListenerList = getProcessListenersFacade(nativeEvtName, vNode, nativeEvent, nativeEventTarget, isCapture);
+  const processingListenerList = getProcessListenersFacade(
+    nativeEvtName,
+    vNode,
+    nativeEvent,
+    nativeEventTarget,
+    isCapture);
 
   // 处理触发的事件队列
   processListeners(processingListenerList);
@@ -178,13 +185,14 @@ export function handleEventMain(
 
   // 有事件正在执行，同步执行事件
   if (isInEventsExecution) {
-    return triggerHorizonEvents(nativeEvtName, isCapture, nativeEvent, rootVNode);
+    triggerHorizonEvents(nativeEvtName, isCapture, nativeEvent, rootVNode);
+    return;
   }
 
   // 没有事件在执行，经过调度再执行事件
   isInEventsExecution = true;
   try {
-    return asyncUpdates(() =>
+    asyncUpdates(() =>
       triggerHorizonEvents(
         nativeEvtName,
         isCapture,
diff --git a/libs/horizon/src/event/Types.ts b/libs/horizon/src/event/Types.ts
index ac9bab0f..fb67cf86 100644
--- a/libs/horizon/src/event/Types.ts
+++ b/libs/horizon/src/event/Types.ts
@@ -5,10 +5,10 @@ import {CustomBaseEvent} from './customEvents/CustomBaseEvent';
 export type AnyNativeEvent = KeyboardEvent | MouseEvent | TouchEvent | UIEvent | Event;
 
 export type ListenerUnit = {
-  vNode: null | VNode,
-  listener: Function,
-  currentTarget: EventTarget,
-  event: CustomBaseEvent,
+  vNode: null | VNode;
+  listener: Function;
+  currentTarget: EventTarget;
+  event: CustomBaseEvent;
 };
 
 export type ListenerUnitList = Array<ListenerUnit>;
diff --git a/libs/horizon/src/event/WrapperListener.ts b/libs/horizon/src/event/WrapperListener.ts
index 9c73299c..ba5d309b 100644
--- a/libs/horizon/src/event/WrapperListener.ts
+++ b/libs/horizon/src/event/WrapperListener.ts
@@ -5,15 +5,6 @@ import {handleEventMain} from './HorizonEventMain';
 import {runDiscreteUpdates} from '../renderer/Renderer';
 import {getEventTarget} from './utils';
 
-// 生成委托事件的监听方法
-export function createCustomEventListener(
-  target: EventTarget,
-  nativeEvtName: string,
-  isCapture: boolean,
-): EventListener {
-  return triggerDelegatedEvent.bind(null, nativeEvtName, isCapture, target);
-}
-
 // 触发委托事件
 function triggerDelegatedEvent(
   nativeEvtName: string,
@@ -39,3 +30,12 @@ function triggerDelegatedEvent(
   }
   handleEventMain(nativeEvtName, isCapture, nativeEvent, targetVNode, targetDom);
 }
+
+// 生成委托事件的监听方法
+export function createCustomEventListener(
+  target: EventTarget,
+  nativeEvtName: string,
+  isCapture: boolean,
+): EventListener {
+  return triggerDelegatedEvent.bind(null, nativeEvtName, isCapture, target);
+}
diff --git a/libs/horizon/src/event/const.ts b/libs/horizon/src/event/const.ts
index 2274bc03..20c954ae 100644
--- a/libs/horizon/src/event/const.ts
+++ b/libs/horizon/src/event/const.ts
@@ -35,7 +35,8 @@ export const horizonEventToNativeMap = new Map([
   ['onCompositionUpdate', ['compositionupdate']],
   ['onBeforeInput', ['compositionend', 'keypress', 'textInput']],
   ['onChange', ['change', 'click', 'focusout', 'input',]],
-  ['onSelect', ['focusout', 'contextmenu', 'dragend', 'focusin', 'keydown', 'keyup', 'mousedown', 'mouseup', 'selectionchange']],
+  ['onSelect', ['focusout', 'contextmenu', 'dragend', 'focusin',
+                'keydown', 'keyup', 'mousedown', 'mouseup', 'selectionchange']],
 
   ['onAnimationEnd', [STYLE_AMT_END]],
   ['onAnimationIteration', [STYLE_AMT_ITERATION]],
diff --git a/libs/horizon/src/event/customEvents/CustomBaseEvent.ts b/libs/horizon/src/event/customEvents/CustomBaseEvent.ts
index 0ebce67a..5ea40d96 100644
--- a/libs/horizon/src/event/customEvents/CustomBaseEvent.ts
+++ b/libs/horizon/src/event/customEvents/CustomBaseEvent.ts
@@ -4,6 +4,48 @@
 
 import {VNode} from '../../renderer/Types';
 
+// 从原生事件中复制属性到自定义事件中
+function extendAttribute(target, source) {
+  const attributes = [
+    // AnimationEvent
+    'animationName', 'elapsedTime', 'pseudoElement',
+    // CompositionEvent、InputEvent
+    'data',
+    // DragEvent
+    'dataTransfer',
+    // FocusEvent
+    'relatedTarget',
+    // KeyboardEvent
+    'key', 'keyCode', 'charCode', 'code', 'location', 'ctrlKey', 'shiftKey',
+    'altKey', 'metaKey', 'repeat', 'locale', 'getModifierState', 'clipboardData',
+    // MouseEvent
+    'button', 'buttons', 'clientX', 'clientY', 'movementX', 'movementY',
+    'pageX', 'pageY', 'screenX', 'screenY', 'currentTarget',
+    // PointerEvent
+    'pointerId', 'width', 'height', 'pressure', 'tangentialPressure',
+    'tiltX', 'tiltY', 'twist', 'pointerType', 'isPrimary',
+    // TouchEvent
+    'touches', 'targetTouches', 'changedTouches',
+    // TransitionEvent
+    'propertyName',
+    // UIEvent
+    'view', 'detail',
+    // WheelEvent
+    'deltaX', 'deltaY', 'deltaZ', 'deltaMode',
+  ];
+
+  attributes.forEach(attr => {
+    if (typeof source[attr] !== 'undefined') {
+      if (typeof source[attr] === 'function') {
+        target[attr] = function() {
+          return source[attr].apply(source, arguments);
+        };
+      } else {
+        target[attr] = source[attr];
+      }
+    }
+  })
+}
 export class CustomBaseEvent {
 
   data: string;
@@ -36,7 +78,9 @@ export class CustomBaseEvent {
     this.target = target;
     this.timeStamp = nativeEvt.timeStamp || Date.now();
 
-    const defaultPrevented = nativeEvt.defaultPrevented != null ? nativeEvt.defaultPrevented : nativeEvt.returnValue === false;
+    const defaultPrevented = nativeEvt.defaultPrevented != null ?
+                             nativeEvt.defaultPrevented :
+                             nativeEvt.returnValue === false;
     this.defaultPrevented = defaultPrevented;
 
     this.preventDefault = this.preventDefault.bind(this);
@@ -77,43 +121,3 @@ export class CustomBaseEvent {
     this.isPropagationStopped = () => true;
   }
 }
-
-// 从原生事件中复制属性到自定义事件中
-function extendAttribute(target, source) {
-  const attributes = [
-    // AnimationEvent
-    'animationName', 'elapsedTime', 'pseudoElement',
-    // CompositionEvent、InputEvent
-    'data',
-    // DragEvent
-    'dataTransfer',
-    // FocusEvent
-    'relatedTarget',
-    // KeyboardEvent
-    'key', 'keyCode', 'charCode', 'code', 'location', 'ctrlKey', 'shiftKey', 'altKey', 'metaKey', 'repeat', 'locale', 'getModifierState', 'clipboardData',
-    // MouseEvent
-    'button', 'buttons', 'clientX', 'clientY', 'movementX', 'movementY', 'pageX', 'pageY', 'screenX', 'screenY', 'currentTarget',
-    // PointerEvent
-    'pointerId', 'width', 'height', 'pressure', 'tangentialPressure', 'tiltX', 'tiltY', 'twist', 'pointerType', 'isPrimary',
-    // TouchEvent
-    'touches', 'targetTouches', 'changedTouches',
-    // TransitionEvent
-    'propertyName',
-    // UIEvent
-    'view', 'detail',
-    // WheelEvent
-    'deltaX', 'deltaY', 'deltaZ', 'deltaMode',
-  ];
-
-  attributes.forEach(attr => {
-    if (typeof source[attr] !== 'undefined') {
-      if (typeof source[attr] === 'function') {
-        target[attr] = function() {
-          return source[attr].apply(source, arguments);
-        };
-      } else {
-        target[attr] = source[attr];
-      }
-    }
-  })
-}
diff --git a/libs/horizon/src/event/simulatedEvtHandler/BeforeInputEventHandler.ts b/libs/horizon/src/event/simulatedEvtHandler/BeforeInputEventHandler.ts
index 833db40a..ccbe450a 100644
--- a/libs/horizon/src/event/simulatedEvtHandler/BeforeInputEventHandler.ts
+++ b/libs/horizon/src/event/simulatedEvtHandler/BeforeInputEventHandler.ts
@@ -9,7 +9,7 @@ const SPACE_CHAR = String.fromCharCode(CHAR_CODE_SPACE);
 function getInputCharsByNative(
   eventName: string,
   nativeEvent: any,
-): string | void {
+): string | null {
   if (eventName === 'compositionend') {
     return (nativeEvent.detail && nativeEvent.detail.data) || null;
   }
diff --git a/libs/horizon/src/event/simulatedEvtHandler/SelectionEventHandler.ts b/libs/horizon/src/event/simulatedEvtHandler/SelectionEventHandler.ts
index 81bc1fcc..87724137 100644
--- a/libs/horizon/src/event/simulatedEvtHandler/SelectionEventHandler.ts
+++ b/libs/horizon/src/event/simulatedEvtHandler/SelectionEventHandler.ts
@@ -13,7 +13,7 @@ const horizonEventName = 'onSelect'
 
 let currentElement = null;
 let currentVNode = null;
-let lastSelection = null;
+let lastSelection: Selection | null = null;
 
 function initTargetCache(dom, vNode) {
   if (isTextInputElement(dom) || dom.contentEditable === 'true') {
@@ -85,7 +85,7 @@ export function getListeners(
   target: null | EventTarget,
 ): ProcessingListenerList {
   const targetNode = vNode ? getDom(vNode) : window;
-  let eventUnitList = [];
+  let eventUnitList: ProcessingListenerList = [];
   switch (name) {
     case 'focusin':
       initTargetCache(targetNode, vNode);
diff --git a/libs/horizon/src/external/ChildrenUtil.ts b/libs/horizon/src/external/ChildrenUtil.ts
index c5eff12e..d1a928fb 100644
--- a/libs/horizon/src/external/ChildrenUtil.ts
+++ b/libs/horizon/src/external/ChildrenUtil.ts
@@ -12,6 +12,44 @@ function getItemKey(item: any, index: number): string {
   return '.' + index.toString(36);
 }
 
+function mapChildrenToArray(
+  children: any,
+  arr: Array<any>,
+  prefix: string,
+  callback?: Function,
+): number | void {
+  const type = typeof children;
+  switch (type) {
+    // 继承原有规格，undefined和boolean类型按照null处理
+    case 'undefined':
+    case 'boolean':
+      callMapFun(null, arr, prefix, callback);
+      return;
+    case 'number':
+    case 'string':
+      callMapFun(children, arr, prefix, callback);
+      return;
+    case 'object':
+      if (children === null) {
+        callMapFun(null, arr, prefix, callback);
+        return;
+      }
+      const vtype = children.vtype;
+      if (vtype === TYPE_COMMON_ELEMENT || vtype === TYPE_PORTAL) {
+        callMapFun(children, arr, prefix, callback) ;
+        return;
+      }
+      if (Array.isArray(children)) {
+        processArrayChildren(children, arr, prefix, callback);
+        return;
+      }
+      throw new Error(
+        'Object is invalid as a Horizon child. '
+      );
+    // No Default
+  }
+}
+
 function processArrayChildren(
   children: any,
   arr: Array<any>,
@@ -61,44 +99,6 @@ function callMapFun(
   }
 }
 
-function mapChildrenToArray(
-  children: any,
-  arr: Array<any>,
-  prefix: string,
-  callback?: Function,
-): number | void {
-  const type = typeof children;
-  switch (type) {
-    // 继承原有规格，undefined和boolean类型按照null处理
-    case 'undefined':
-    case 'boolean':
-      callMapFun(null, arr, prefix, callback);
-      return;
-    case 'number':
-    case 'string':
-      callMapFun(children, arr, prefix, callback);
-      return;
-    case 'object':
-      if (children === null) {
-        callMapFun(null, arr, prefix, callback);
-        return;
-      }
-      const vtype = children.vtype;
-      if (vtype === TYPE_COMMON_ELEMENT || vtype === TYPE_PORTAL) {
-        callMapFun(children, arr, prefix, callback) ;
-        return;
-      }
-      if (Array.isArray(children)) {
-        processArrayChildren(children, arr, prefix, callback);
-        return;
-      }
-      throw new Error(
-        'Object is invalid as a Horizon child. '
-      );
-    // No Default
-  }
-}
-
 // 在 children 里的每个直接子节点上调用一个函数，并将 this 设置为 thisArg
 function mapChildren(
   children: any,
diff --git a/libs/horizon/src/external/JSXElement.ts b/libs/horizon/src/external/JSXElement.ts
index f0218ac9..9a06a957 100644
--- a/libs/horizon/src/external/JSXElement.ts
+++ b/libs/horizon/src/external/JSXElement.ts
@@ -41,7 +41,7 @@ function buildElement(isClone, type, setting, ...children) {
   // setting中的值优先级最高，clone情况下从 type 中取值，创建情况下直接赋值为 null
   const key = (setting && setting.key !== undefined) ? String(setting.key) : (isClone ? type.key : null);
   const ref = (setting && setting.ref !== undefined) ? setting.ref : (isClone ? type.ref : null);
-  const props = isClone ? {...type.props} : {};
+  const props = isClone ? { ...type.props } : {};
   let vNode = isClone ? type.belongClassVNode : getProcessingClassVNode();
 
   if (setting != null) {
diff --git a/libs/horizon/src/renderer/ContextSaver.ts b/libs/horizon/src/renderer/ContextSaver.ts
index b5200eaa..d092dd76 100644
--- a/libs/horizon/src/renderer/ContextSaver.ts
+++ b/libs/horizon/src/renderer/ContextSaver.ts
@@ -31,7 +31,7 @@ let ctxOldPreviousContext: Object = {};
 
 // capture阶段设置
 function setNamespaceCtx(vNode: VNode, dom?: Container) {
-  const nextContext = getNSCtx(dom, ctxNamespace, vNode.type);
+  const nextContext = getNSCtx(ctxNamespace, vNode.type, dom);
 
   vNode.setContext(CTX_NAMESPACE, ctxNamespace);
   ctxNamespace = nextContext;
diff --git a/libs/horizon/src/renderer/ErrorHandler.ts b/libs/horizon/src/renderer/ErrorHandler.ts
index 0e472f16..db190048 100644
--- a/libs/horizon/src/renderer/ErrorHandler.ts
+++ b/libs/horizon/src/renderer/ErrorHandler.ts
@@ -14,6 +14,55 @@ import {handleSuspenseChildThrowError} from './render/SuspenseComponent';
 import {updateShouldUpdateOfTree} from './vnode/VNodeShouldUpdate';
 import {BuildErrored, setBuildResult} from './GlobalVar';
 
+function consoleError(error: any): void {
+  if (isDev) {
+    // 只打印message为了让测试用例能pass
+    console['error']('The codes throw the error: ' + error.message);
+  } else {
+    console['error'](error);
+  }
+}
+
+function handleRootError(
+  error: any,
+) {
+  // 注意：如果根节点抛出错误，不会销毁整棵树，只打印日志，抛出异常。
+  setRootThrowError(error);
+  consoleError(error);
+}
+
+function createClassErrorUpdate(
+  vNode: VNode,
+  error: any,
+): Update {
+  const update = newUpdate();
+  update.type = UpdateState.Error;
+
+  const getDerivedStateFromError = vNode.type.getDerivedStateFromError;
+  if (typeof getDerivedStateFromError === 'function') {
+    update.content = () => {
+      consoleError(error);
+      return getDerivedStateFromError(error);
+    };
+  }
+
+  const inst = vNode.realNode;
+  if (inst !== null && typeof inst.componentDidCatch === 'function') {
+    update.callback = function callback() {
+      if (typeof getDerivedStateFromError !== 'function') {
+        // 打印错误
+        consoleError(error);
+      }
+
+      // @ts-ignore
+      this.componentDidCatch(error, {
+        componentStack: '',
+      });
+    };
+  }
+  return update;
+}
+
 // 处理capture和bubble阶段抛出的错误
 export function handleRenderThrowError(
   sourceVNode: VNode,
@@ -77,6 +126,19 @@ export function handleRenderThrowError(
   } while (vNode !== null);
 }
 
+// 新增一个update，并且触发调度
+function triggerUpdate(vNode, state) {
+  const update = newUpdate();
+  update.content = state;
+  pushUpdate(vNode, update);
+
+  const root = updateShouldUpdateOfTree(vNode);
+  if (root !== null) {
+    tryRenderRoot(root);
+  }
+}
+
+
 // 处理submit阶段的异常
 export function handleSubmitError(vNode: VNode, error: any) {
   if (vNode.tag === TreeRoot) {
@@ -127,64 +189,3 @@ export function handleSubmitError(vNode: VNode, error: any) {
     node = node.parent;
   }
 }
-
-function createClassErrorUpdate(
-  vNode: VNode,
-  error: any,
-): Update {
-  const update = newUpdate();
-  update.type = UpdateState.Error;
-
-  const getDerivedStateFromError = vNode.type.getDerivedStateFromError;
-  if (typeof getDerivedStateFromError === 'function') {
-    update.content = () => {
-      consoleError(error);
-      return getDerivedStateFromError(error);
-    };
-  }
-
-  const inst = vNode.realNode;
-  if (inst !== null && typeof inst.componentDidCatch === 'function') {
-    update.callback = function callback() {
-      if (typeof getDerivedStateFromError !== 'function') {
-        // 打印错误
-        consoleError(error);
-      }
-
-      // @ts-ignore
-      this.componentDidCatch(error, {
-        componentStack: '',
-      });
-    };
-  }
-  return update;
-}
-
-// 新增一个update，并且触发调度
-function triggerUpdate(vNode, state) {
-  const update = newUpdate();
-  update.content = state;
-  pushUpdate(vNode, update);
-
-  const root = updateShouldUpdateOfTree(vNode);
-  if (root !== null) {
-    tryRenderFromRoot(root);
-  }
-}
-
-function handleRootError(
-  error: any,
-) {
-  // 注意：如果根节点抛出错误，不会销毁整棵树，只打印日志，抛出异常。
-  setRootThrowError(error);
-  consoleError(error);
-}
-
-function consoleError(error: any): void {
-  if (isDev) {
-    // 只打印message为了让测试用例能pass
-    console['error']('The codes throw the error: ' + error.message);
-  } else {
-    console['error'](error);
-  }
-}
diff --git a/libs/horizon/src/renderer/TreeBuilder.ts b/libs/horizon/src/renderer/TreeBuilder.ts
index 0c7aacd8..ff7dd150 100644
--- a/libs/horizon/src/renderer/TreeBuilder.ts
+++ b/libs/horizon/src/renderer/TreeBuilder.ts
@@ -129,6 +129,27 @@ function handleError(root, error): void {
   bubbleVNode(processing);
 }
 
+// 判断数组中节点的path的idx元素是否都相等
+function isEqualByIndex(idx: number, nodes: Array<VNode>) {
+  let val = nodes[0].path[idx];
+  for (let i = 1; i < nodes.length; i++) {
+    let node = nodes[i];
+    if (val !== node.path[idx]) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function getChildByIndex(vNode: VNode, idx: number) {
+  let node = vNode.child;
+  for (let i = 0; i < idx; i++) {
+    node = node.next;
+  }
+  return node;
+}
+
 // 从多个更新节点中，计算出开始节点。即：找到最近的共同的父辈节点
 export function calcStartUpdateVNode(treeRoot: VNode) {
   const toUpdateNodes = Array.from(treeRoot.toUpdateNodes);
@@ -292,25 +313,10 @@ export function launchUpdateFromVNode(vNode: VNode) {
   }
 }
 
-// 判断数组中节点的path的idx元素是否都相等
-function isEqualByIndex(idx: number, nodes: Array<VNode>) {
-  let val = nodes[0].path[idx];
-  for (let i = 1; i < nodes.length; i++) {
-    let node = nodes[i];
-    if (val !== node.path[idx]) {
-      return false;
-    }
+export function setBuildResultError() {
+  if (getBuildResult() !== BuildCompleted) {
+    setBuildResult(BuildErrored);
   }
-
-  return true;
-}
-
-function getChildByIndex(vNode: VNode, idx: number) {
-  let node = vNode.child;
-  for (let i = 0; i < idx; i++) {
-    node = node.next;
-  }
-  return node;
 }
 
 // ============================== HorizonDOM使用 ==============================
diff --git a/libs/horizon/src/renderer/Types.ts b/libs/horizon/src/renderer/Types.ts
index 6765fe10..9acbc42c 100644
--- a/libs/horizon/src/renderer/Types.ts
+++ b/libs/horizon/src/renderer/Types.ts
@@ -21,7 +21,6 @@ export type JSXElement = {
   key: any;
   ref: any;
   props: any;
-  
   belongClassVNode: any;
 };
 
diff --git a/libs/horizon/src/renderer/diff/DiffTools.ts b/libs/horizon/src/renderer/diff/DiffTools.ts
index 0b14f611..9b152d92 100644
--- a/libs/horizon/src/renderer/diff/DiffTools.ts
+++ b/libs/horizon/src/renderer/diff/DiffTools.ts
@@ -2,9 +2,8 @@ import type { VNode, JSXElement } from '../Types';
 
 // 当前vNode和element是同样的类型
 // LazyComponent 会修改type的类型，所以特殊处理这种类型
-export const isSameType = (vNode: VNode, ele: JSXElement) => {
-  return vNode.type === ele.type || (vNode.isLazyComponent && vNode.lazyType === ele.type);
-};
+export const isSameType = (vNode: VNode, ele: JSXElement) =>
+   vNode.type === ele.type || (vNode.isLazyComponent && vNode.lazyType === ele.type);
 
 export function isTextType(newChild: any) {
   return typeof newChild === 'string' || typeof newChild === 'number';
diff --git a/libs/horizon/src/renderer/diff/nodeDiffComparator.ts b/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
index cf2a7993..09624161 100644
--- a/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
+++ b/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
@@ -1,7 +1,7 @@
 import type { VNode } from '../Types';
 import { FlagUtils } from '../vnode/VNodeFlags';
 import { TYPE_COMMON_ELEMENT, TYPE_FRAGMENT, TYPE_PORTAL } from '../../external/JSXElementType';
-import { DomText, DomPortal, Fragment } from '../vnode/VNodeTags';
+import { DomText, DomPortal, Fragment, DomComponent } from '../vnode/VNodeTags';
 import {updateVNode, createVNode, createVNodeFromElement, updateVNodePath} from '../vnode/VNodeCreator';
 import {
   isSameType,
@@ -17,7 +17,7 @@ enum DiffCategory {
   TEXT_NODE = 'TEXT_NODE',
   OBJECT_NODE = 'OBJECT_NODE',
   ARR_NODE = 'ARR_NODE',
-};
+}
 
 // 检查是不是被 FRAGMENT 包裹
 function isNoKeyFragment(child: any) {
@@ -31,7 +31,7 @@ function deleteVNode(parentNode: VNode, delVNode: VNode): void {
 }
 
 // 清除多个节点
-function deleteVNodes(parentVNode: VNode, startDelVNode: VNode, endVNode?: VNode): void {
+function deleteVNodes(parentVNode: VNode, startDelVNode: VNode | null, endVNode?: VNode): void {
   let node = startDelVNode;
 
   while (node !== null) {
@@ -67,7 +67,7 @@ function checkCanReuseNode(oldNode: VNode | null, newChild: any): boolean {
   return false;
 }
 
-function getNodeType(newChild: any): string {
+function getNodeType(newChild: any): string | null {
   if (newChild === null) {
     return null;
   }
@@ -186,9 +186,7 @@ function transLeftChildrenToMap(
 
   travelChildren(startChild, (node) => {
     leftChildrenMap.set(node.key !== null ? node.key : node.eIndex, node);
-  }, (node) => {
-    return node === rightEndVNode;
-  });
+  }, node => node === rightEndVNode);
 
   return leftChildrenMap;
 }
@@ -208,6 +206,11 @@ function getOldNodeFromMap(nodeMap: Map<string | number, VNode>, newIdx: number,
   return null;
 }
 
+function setCIndex(vNode: VNode, idx: number) {
+  vNode.cIndex = idx;
+  updateVNodePath(vNode);
+}
+
 // diff数组类型的节点，核心算法
 function diffArrayNodes(
   parentNode: VNode,
@@ -277,7 +280,7 @@ function diffArrayNodes(
   // 从后往前，新资源的位置还没有到最末端，旧的vNode也还没遍历完，则可以考虑从后往前开始
   if (rightIdx > leftIdx && oldNode !== null) {
     const rightRemainingOldChildren = transRightChildrenToArray(oldNode);
-    let rightOldIndex = rightRemainingOldChildren.length - 1;
+    let rightOldIndex: number | null = rightRemainingOldChildren.length - 1;
 
     // 2. 从右侧开始比对currentVNode和newChildren，若不能复用则跳出循环
     for (; rightIdx > leftIdx; rightIdx--) {
@@ -320,7 +323,12 @@ function diffArrayNodes(
   // 3. 新节点已经处理完成
   if (leftIdx === rightIdx) {
     if (isComparing) {
-      deleteVNodes(parentNode, oldNode, rightEndOldNode);
+      if (firstChild && parentNode.tag === DomComponent && newChildren.length === 0) {
+        FlagUtils.markClear(parentNode);
+        parentNode.clearChild = firstChild;
+      } else {
+        deleteVNodes(parentNode, oldNode, rightEndOldNode);
+      }
     }
 
     if (rightNewNode) {
@@ -372,7 +380,7 @@ function diffArrayNodes(
       if (oldNodeFromMap !== null) {
         let eIndex = newNode.eIndex;
         eIndexes.push(eIndex);
-        const last = eIndexes[result[result.length - 1]];
+        const last: number | undefined = eIndexes[result[result.length - 1]];
         if (eIndex > last || last === undefined) { // 大的 eIndex直接放在最后
           preIndex[i] = result[result.length - 1];
           result.push(i);
@@ -450,11 +458,6 @@ function setVNodesCIndex(startChild: VNode, startIdx: number) {
   }
 }
 
-function setCIndex(vNode: VNode, idx: number) {
-  vNode.cIndex = idx;
-  updateVNodePath(vNode);
-}
-
 // 新节点是数组类型
 function diffArrayNodesHandler(
   parentNode: VNode,
diff --git a/libs/horizon/src/renderer/hooks/BaseHook.ts b/libs/horizon/src/renderer/hooks/BaseHook.ts
index 18e59db1..8c3f3605 100644
--- a/libs/horizon/src/renderer/hooks/BaseHook.ts
+++ b/libs/horizon/src/renderer/hooks/BaseHook.ts
@@ -1,5 +1,5 @@
-import type {VNode} from '../Types';
-import type {Hook} from './HookType';
+import type { VNode } from '../Types';
+import type { Hook } from './HookType';
 
 let processingVNode: VNode = null;
 
@@ -56,7 +56,9 @@ export function getNextHook(hook: Hook<any, any>, hooks: Array<Hook<any, any>>)
 // processing中的hook和上一次执行中的hook，需要同时往前走，
 // 原因：1.比对hook的数量有没有变化（非必要）；2.从上一次执行中的hook获取removeEffect
 export function getCurrentHook(): Hook<any, any> {
-  currentHook = currentHook !== null ? getNextHook(currentHook, processingVNode.hooks) : (processingVNode.hooks[0] || null);
+  currentHook = currentHook !== null ?
+    getNextHook(currentHook, processingVNode.hooks) :
+    (processingVNode.hooks[0] || null);
 
   if (lastTimeHook !== null) {
     lastTimeHook = getNextHook(lastTimeHook, processingVNode.oldHooks);
diff --git a/libs/horizon/src/renderer/hooks/UseReducerHook.ts b/libs/horizon/src/renderer/hooks/UseReducerHook.ts
index 4c241152..52399713 100644
--- a/libs/horizon/src/renderer/hooks/UseReducerHook.ts
+++ b/libs/horizon/src/renderer/hooks/UseReducerHook.ts
@@ -1,4 +1,4 @@
-import type {Hook, Reducer, Trigger, Update} from './HookType';
+import type { Hook, Reducer, Trigger, Update } from './HookType';
 import {
   createHook,
   getCurrentHook,
@@ -8,12 +8,13 @@ import {
 import {
   launchUpdateFromVNode
 } from '../TreeBuilder';
-import {isSame} from '../utils/compare';
-import {setStateChange} from '../render/FunctionComponent';
-import {getHookStage, HookStage} from './HookStage';
-import type {VNode} from '../Types';
+import { isSame } from '../utils/compare';
+import { setStateChange } from '../render/FunctionComponent';
+import { getHookStage, HookStage } from './HookStage';
+import type { VNode } from '../Types';
 
-export function useReducerImpl<S, P, A>(reducer: (S, A) => S, initArg: P, init?: (P) => S, isUseState?: boolean): [S, Trigger<A>] {
+export function useReducerImpl<S, P, A>(reducer: (S, A) =>
+  S, initArg: P, init?: (P) => S, isUseState?: boolean): [S, Trigger<A>] | void {
   const stage = getHookStage();
   if (stage === null) {
     throwNotInFuncError();
diff --git a/libs/horizon/src/renderer/render/Fragment.ts b/libs/horizon/src/renderer/render/Fragment.ts
index a64c2532..27c2b5c1 100644
--- a/libs/horizon/src/renderer/render/Fragment.ts
+++ b/libs/horizon/src/renderer/render/Fragment.ts
@@ -1,10 +1,6 @@
 import type {VNode} from '../Types';
 import {createVNodeChildren} from './BaseComponent';
 
-export function captureRender(processing: VNode): VNode | null {
-  return captureFragment(processing);
-}
-
 export function bubbleRender() {}
 
 function captureFragment(processing: VNode) {
@@ -12,3 +8,7 @@ function captureFragment(processing: VNode) {
   processing.child = createVNodeChildren(processing, newElement);
   return processing.child;
 }
+
+export function captureRender(processing: VNode): VNode | null {
+  return captureFragment(processing);
+}
diff --git a/libs/horizon/src/renderer/render/IncompleteClassComponent.ts b/libs/horizon/src/renderer/render/IncompleteClassComponent.ts
index 7de50b1a..2c50ed18 100644
--- a/libs/horizon/src/renderer/render/IncompleteClassComponent.ts
+++ b/libs/horizon/src/renderer/render/IncompleteClassComponent.ts
@@ -10,7 +10,18 @@ import {
   cacheOldCtx,
 } from '../components/context/CompatibleContext';
 
-export function captureRender(processing: VNode): Array<VNode> | null {
+function captureIncompleteClassComponent(processing, Component, nextProps) {
+  processing.tag = ClassComponent;
+
+  const hasOldContext = isOldProvider(Component);
+  cacheOldCtx(processing, hasOldContext);
+
+  resetDepContexts(processing);
+
+  return getIncompleteClassComponent(Component, processing, nextProps);
+}
+
+export function captureRender(processing: VNode): VNode | null {
   const Component = processing.type;
   const unresolvedProps = processing.props;
   const resolvedProps =
@@ -28,14 +39,3 @@ export function bubbleRender(processing: VNode) {
     resetOldCtx(processing);
   }
 }
-
-function captureIncompleteClassComponent(processing, Component, nextProps) {
-  processing.tag = ClassComponent;
-
-  const hasOldContext = isOldProvider(Component);
-  cacheOldCtx(processing, hasOldContext);
-
-  resetDepContexts(processing);
-
-  return getIncompleteClassComponent(Component, processing, nextProps);
-}
diff --git a/libs/horizon/src/renderer/render/LazyComponent.ts b/libs/horizon/src/renderer/render/LazyComponent.ts
index f3dcc954..a1f911ad 100644
--- a/libs/horizon/src/renderer/render/LazyComponent.ts
+++ b/libs/horizon/src/renderer/render/LazyComponent.ts
@@ -13,10 +13,6 @@ import { captureFunctionComponent } from './FunctionComponent';
 import { captureClassComponent } from './ClassComponent';
 import { captureMemoComponent } from './MemoComponent';
 
-export function captureRender(processing: VNode, shouldUpdate: boolean): VNode | null {
-  return captureLazyComponent(processing, processing.type, shouldUpdate);
-}
-
 export function bubbleRender() { }
 
 const LazyRendererMap = {
@@ -26,6 +22,20 @@ const LazyRendererMap = {
   [MemoComponent]: captureMemoComponent,
 };
 
+export function mergeDefaultProps(Component: any, props: object): object {
+  if (Component && Component.defaultProps) {
+    const clonedProps = { ...props };
+    const defaultProps = Component.defaultProps;
+    Object.keys(defaultProps).forEach(key => {
+      if (clonedProps[key] === undefined) {
+        clonedProps[key] = defaultProps[key];
+      }
+    });
+    return clonedProps;
+  }
+  return props;
+}
+
 function captureLazyComponent(
   processing,
   lazyComponent,
@@ -43,7 +53,8 @@ function captureLazyComponent(
   // 加载得到的Component存在type中
   processing.type = Component;
 
-  const lazyVNodeTag = processing.tag = getLazyVNodeTag(Component);
+  const lazyVNodeTag = getLazyVNodeTag(Component);
+  processing.tag = lazyVNodeTag;
   const lazyVNodeProps = mergeDefaultProps(Component, processing.props);
 
   const lazyRender = LazyRendererMap[lazyVNodeTag];
@@ -68,16 +79,6 @@ function captureLazyComponent(
   }
 }
 
-export function mergeDefaultProps(Component: any, props: object): object {
-  if (Component && Component.defaultProps) {
-    const clonedProps = { ...props };
-    const defaultProps = Component.defaultProps;
-    Object.keys(defaultProps).forEach(key => {
-      if (clonedProps[key] === undefined) {
-        clonedProps[key] = defaultProps[key];
-      }
-    });
-    return clonedProps;
-  }
-  return props;
+export function captureRender(processing: VNode, shouldUpdate: boolean): VNode | null {
+  return captureLazyComponent(processing, processing.type, shouldUpdate);
 }
diff --git a/libs/horizon/src/renderer/render/MemoComponent.ts b/libs/horizon/src/renderer/render/MemoComponent.ts
index fd273249..d4a10d22 100644
--- a/libs/horizon/src/renderer/render/MemoComponent.ts
+++ b/libs/horizon/src/renderer/render/MemoComponent.ts
@@ -10,10 +10,6 @@ import {
 } from '../../external/JSXElementType';
 import {Fragment} from '../vnode/VNodeTags';
 
-export function captureRender(processing: VNode, shouldUpdate: boolean): VNode | null {
-  return captureMemoComponent(processing, shouldUpdate);
-}
-
 export function bubbleRender() {}
 
 export function captureMemoComponent(
@@ -59,3 +55,7 @@ export function captureMemoComponent(
 
   return newChild;
 }
+
+export function captureRender(processing: VNode, shouldUpdate: boolean): VNode | null {
+  return captureMemoComponent(processing, shouldUpdate);
+}
diff --git a/libs/horizon/src/renderer/render/SuspenseComponent.ts b/libs/horizon/src/renderer/render/SuspenseComponent.ts
index 47d117a8..b601a551 100644
--- a/libs/horizon/src/renderer/render/SuspenseComponent.ts
+++ b/libs/horizon/src/renderer/render/SuspenseComponent.ts
@@ -19,73 +19,36 @@ export enum SuspenseChildStatus {
   ShowFallback = 'showFallback',
 }
 
-export function captureRender(processing: VNode, shouldUpdate: boolean): Array<VNode> | VNode | null {
-  if (
-    !processing.isCreated &&
-    processing.oldProps === processing.props &&
-    !getContextChangeCtx() &&
-    !shouldUpdate
-  ) {
-    if (processing.suspenseChildStatus === SuspenseChildStatus.ShowFallback) {
-      // 当显示fallback时，suspense的子组件要更新
-      return updateFallback(processing);
-    }
-    return onlyUpdateChildVNodes(processing);
-  }
-
-  return captureSuspenseComponent(processing);
-}
-
-function updateFallback(processing: VNode): Array<VNode> | VNode | null {
+// 创建fallback子节点
+function createFallback(processing: VNode, fallbackChildren) {
   const childFragment: VNode = processing.child;
+  let fallbackFragment;
+  childFragment.childShouldUpdate = false;
 
-  if (childFragment.childShouldUpdate) {
-    if (processing.promiseResolve) {
-      // promise已完成，展示promise返回的新节点
-      return captureSuspenseComponent(processing);
+  if (!processing.isCreated) {
+    const oldFallbackFragment: VNode | null = processing.oldChild ? processing.oldChild.next : null;
+
+    if (oldFallbackFragment !== null) {
+      fallbackFragment = updateVNode(oldFallbackFragment, fallbackChildren);
     } else {
-      // promise未完成，继续显示fallback，不需要继续刷新子节点
-      const fallbackFragment: VNode = processing.child.next;
-      childFragment.childShouldUpdate = false;
-      fallbackFragment.childShouldUpdate = false;
-      return null;
+      fallbackFragment = createVNode(Fragment, null, fallbackChildren);
+      FlagUtils.markAddition(fallbackFragment);
     }
   } else {
-    const children = onlyUpdateChildVNodes(processing);
-
-    if (children !== null) {
-      // child不需要更新，跳过child处理fallback
-      return children[1];
-    } else {
-      return null;
-    }
-  }
-}
-
-export function bubbleRender(processing: VNode) {
-  if (processing.suspenseChildStatus === SuspenseChildStatus.ShowFallback
-    || (!processing.isCreated && processing.oldSuspenseChildStatus === SuspenseChildStatus.ShowFallback)
-  ) {
-    FlagUtils.markUpdate(processing);
+    // 创建
+    fallbackFragment = createVNode(Fragment, null, fallbackChildren);
   }
 
-  return null;
-}
+  processing.child = childFragment;
+  childFragment.next = fallbackFragment;
+  childFragment.parent = processing;
+  fallbackFragment.parent = processing;
+  fallbackFragment.eIndex = 1;
+  fallbackFragment.cIndex = 1;
+  updateVNodePath(fallbackFragment);
+  processing.suspenseChildStatus = SuspenseChildStatus.ShowFallback;
 
-export function captureSuspenseComponent(processing: VNode) {
-  const nextProps = processing.props;
-
-  // suspense被捕获后需要展示fallback
-  const showFallback = processing.suspenseDidCapture;
-
-  if (showFallback) {
-    processing.suspenseDidCapture = false;
-    const nextFallbackChildren = nextProps.fallback;
-    return createFallback(processing, nextFallbackChildren);
-  } else {
-    const newChildren = nextProps.children;
-    return createSuspenseChildren(processing, newChildren);
-  }
+  return fallbackFragment;
 }
 
 // 创建子节点
@@ -120,36 +83,77 @@ function createSuspenseChildren(processing: VNode, newChildren) {
   return processing.child;
 }
 
-// 创建fallback子节点
-function createFallback(processing: VNode, fallbackChildren) {
-  const childFragment: VNode = processing.child;
-  let fallbackFragment;
-  childFragment.childShouldUpdate = false;
+export function captureSuspenseComponent(processing: VNode) {
+  const nextProps = processing.props;
 
-  if (!processing.isCreated) {
-    const oldFallbackFragment: VNode | null = processing.oldChild ? processing.oldChild.next : null;
+  // suspense被捕获后需要展示fallback
+  const showFallback = processing.suspenseDidCapture;
 
-    if (oldFallbackFragment !== null) {
-      fallbackFragment = updateVNode(oldFallbackFragment, fallbackChildren);
+  if (showFallback) {
+    processing.suspenseDidCapture = false;
+    const nextFallbackChildren = nextProps.fallback;
+    return createFallback(processing, nextFallbackChildren);
+  } else {
+    const newChildren = nextProps.children;
+    return createSuspenseChildren(processing, newChildren);
+  }
+}
+
+function updateFallback(processing: VNode): Array<VNode> | VNode | null {
+  const childFragment: VNode | null= processing.child;
+
+  if (childFragment?.childShouldUpdate) {
+    if (processing.promiseResolve) {
+      // promise已完成，展示promise返回的新节点
+      return captureSuspenseComponent(processing);
     } else {
-      fallbackFragment = createVNode(Fragment, null, fallbackChildren);
-      FlagUtils.markAddition(fallbackFragment);
+      // promise未完成，继续显示fallback，不需要继续刷新子节点
+      const fallbackFragment: VNode = processing.child.next;
+      childFragment.childShouldUpdate = false;
+      fallbackFragment.childShouldUpdate = false;
+      return null;
     }
   } else {
-    // 创建
-    fallbackFragment = createVNode(Fragment, null, fallbackChildren);
+    const children = onlyUpdateChildVNodes(processing);
+
+    if (children !== null) {
+      // child不需要更新，跳过child处理fallback
+      return children[1];
+    } else {
+      return null;
+    }
+  }
+}
+
+export function captureRender(processing: VNode, shouldUpdate: boolean): Array<VNode> | VNode | null {
+  if (
+    !processing.isCreated &&
+    processing.oldProps === processing.props &&
+    !getContextChangeCtx() &&
+    !shouldUpdate
+  ) {
+    if (processing.suspenseChildStatus === SuspenseChildStatus.ShowFallback) {
+      // 当显示fallback时，suspense的子组件要更新
+      return updateFallback(processing);
+    }
+    return onlyUpdateChildVNodes(processing);
   }
 
-  processing.child = childFragment;
-  childFragment.next = fallbackFragment;
-  childFragment.parent = processing;
-  fallbackFragment.parent = processing;
-  fallbackFragment.eIndex = 1;
-  fallbackFragment.cIndex = 1;
-  updateVNodePath(fallbackFragment);
-  processing.suspenseChildStatus = SuspenseChildStatus.ShowFallback;
+  return captureSuspenseComponent(processing);
+}
 
-  return fallbackFragment;
+export function bubbleRender(processing: VNode) {
+  if (processing.suspenseChildStatus === SuspenseChildStatus.ShowFallback
+    || (!processing.isCreated && processing.oldSuspenseChildStatus === SuspenseChildStatus.ShowFallback)
+  ) {
+    FlagUtils.markUpdate(processing);
+  }
+
+  return null;
+}
+
+function canCapturePromise(vNode: VNode | null): boolean {
+  return vNode?.suspenseChildStatus !== SuspenseChildStatus.ShowFallback && vNode?.props.fallback !== undefined;
 }
 
 // 处理Suspense子组件抛出的promise
@@ -196,36 +200,8 @@ export function handleSuspenseChildThrowError(parent: VNode, processing: VNode,
   return false;
 }
 
-function canCapturePromise(vNode: VNode): boolean {
-  return vNode.suspenseChildStatus !== SuspenseChildStatus.ShowFallback && vNode.props.fallback !== undefined;
-}
-
 const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;
 
-// 对于每个promise，添加一个侦听器，以便当它resolve时，重新渲染
-export function listenToPromise(suspenseVNode: VNode) {
-  const promises: Set<PromiseType<any>> | null = suspenseVNode.suspensePromises;
-  if (promises !== null) {
-    suspenseVNode.suspensePromises = null;
-
-    // 记录已经监听的 promise
-    let promiseCache = suspenseVNode.realNode;
-    if (promiseCache === null) {
-      // @ts-ignore
-      promiseCache = suspenseVNode.realNode = new PossiblyWeakSet();
-    }
-
-    promises.forEach(promise => {
-      const resole = resolvePromise.bind(null, suspenseVNode, promise);
-      if (!promiseCache.has(promise)) {
-        promiseCache.add(promise);
-        // 监听promise
-        promise.then(resole, resole);
-      }
-    });
-  }
-}
-
 function resolvePromise(suspenseVNode: VNode, promise: PromiseType<any>) {
   const promiseCache = suspenseVNode.realNode;
   if (promiseCache !== null) {
@@ -238,4 +214,27 @@ function resolvePromise(suspenseVNode: VNode, promise: PromiseType<any>) {
   }
 }
 
+// 对于每个promise，添加一个侦听器，以便当它resolve时，重新渲染
+export function listenToPromise(suspenseVNode: VNode) {
+  const promises: Set<PromiseType<any>> | null = suspenseVNode.suspensePromises;
+  if (promises !== null) {
+    suspenseVNode.suspensePromises = null;
 
+    // 记录已经监听的 promise
+    let promiseCache = suspenseVNode.realNode;
+    if (promiseCache === null) {
+      // @ts-ignore
+      promiseCache = new PossiblyWeakSet();
+      suspenseVNode.realNode = new PossiblyWeakSet();
+    }
+
+    promises.forEach(promise => {
+      const resole = resolvePromise.bind(null, suspenseVNode, promise);
+      if (!promiseCache.has(promise)) {
+        promiseCache.add(promise);
+        // 监听promise
+        promise.then(resole, resole);
+      }
+    });
+  }
+}
diff --git a/libs/horizon/src/renderer/render/TreeRoot.ts b/libs/horizon/src/renderer/render/TreeRoot.ts
index 8b4f2026..c9f54646 100644
--- a/libs/horizon/src/renderer/render/TreeRoot.ts
+++ b/libs/horizon/src/renderer/render/TreeRoot.ts
@@ -6,10 +6,6 @@ import {resetNamespaceCtx, setNamespaceCtx} from '../ContextSaver';
 import {resetOldCtx} from '../components/context/CompatibleContext';
 import {onlyUpdateChildVNodes} from '../vnode/VNodeCreator';
 
-export function captureRender(processing: VNode): VNode | null {
-  return updateTreeRoot(processing);
-}
-
 export function bubbleRender(processing: VNode) {
   resetNamespaceCtx(processing);
   resetOldCtx(processing);
@@ -40,3 +36,7 @@ function updateTreeRoot(processing) {
   processing.child = createVNodeChildren(processing, newElement);
   return processing.child;
 }
+
+export function captureRender(processing: VNode): VNode | null {
+  return updateTreeRoot(processing);
+}
diff --git a/libs/horizon/src/renderer/render/class/ClassLifeCycleProcessor.ts b/libs/horizon/src/renderer/render/class/ClassLifeCycleProcessor.ts
index d6e21c2c..40fbbf40 100644
--- a/libs/horizon/src/renderer/render/class/ClassLifeCycleProcessor.ts
+++ b/libs/horizon/src/renderer/render/class/ClassLifeCycleProcessor.ts
@@ -1,7 +1,7 @@
 import type { VNode } from '../../Types';
 import type { Callback } from '../../UpdateHandler';
 
-import {shallowCompare} from '../../utils/compare';
+import { shallowCompare } from '../../utils/compare';
 import {
   pushUpdate,
   newUpdate,
@@ -40,7 +40,7 @@ function changeStateContent(type: UpdateState, content: object, callback: Callba
   if (type === UpdateState.Update || type === UpdateState.Override) {
     update.content = content;
   }
-  if (callback !== undefined && callback !== null) {
+  if (callback) {
     update.callback = callback;
   }
 
diff --git a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
index 5e2fd84b..ecaa6298 100644
--- a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
+++ b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
@@ -2,10 +2,10 @@
  * 该文件负责把更新应用到界面上 以及 和生命周期的相关调用
  */
 
-import type {Container} from '../../dom/DOMOperator';
-import type {RefType, VNode} from '../Types';
+import type { Container } from '../../dom/DOMOperator';
+import type { RefType, VNode } from '../Types';
 
-import {listenToPromise, SuspenseChildStatus} from '../render/SuspenseComponent';
+import { listenToPromise, SuspenseChildStatus } from '../render/SuspenseComponent';
 import {
   FunctionComponent,
   ForwardRef,
@@ -17,8 +17,8 @@ import {
   SuspenseComponent,
   MemoComponent,
 } from '../vnode/VNodeTags';
-import {FlagUtils, ResetText} from '../vnode/VNodeFlags';
-import {mergeDefaultProps} from '../render/LazyComponent';
+import { FlagUtils, ResetText, Clear } from '../vnode/VNodeFlags';
+import { mergeDefaultProps } from '../render/LazyComponent';
 import {
   submitDomUpdate,
   clearText,
@@ -29,15 +29,20 @@ import {
   unHideDom,
   clearContainer,
 } from '../../dom/DOMOperator';
-import {callEffectRemove, callUseEffects, callUseLayoutEffectCreate, callUseLayoutEffectRemove} from './HookEffectHandler';
-import {handleSubmitError} from '../ErrorHandler';
+import {
+  callEffectRemove,
+  callUseEffects,
+  callUseLayoutEffectCreate,
+  callUseLayoutEffectRemove
+} from './HookEffectHandler';
+import { handleSubmitError } from '../ErrorHandler';
 import {
   travelVNodeTree,
   clearVNode,
   isDomVNode,
   findDomParent, getSiblingDom,
 } from '../vnode/VNodeUtils';
-import {shouldAutoFocus} from '../../dom/utils/Common';
+import { shouldAutoFocus } from '../../dom/utils/Common';
 
 function callComponentWillUnmount(vNode: VNode, instance: any) {
   try {
@@ -220,14 +225,14 @@ function unmountVNode(vNode: VNode): void {
 function unmountNestedVNodes(vNode: VNode): void {
   travelVNodeTree(vNode, (node) => {
     unmountVNode(node);
-  }, (node) => {
+  }, node =>
     // 如果是DomPortal，不需要遍历child
-    return node.tag === DomPortal;
-  });
+    node.tag === DomPortal
+  );
 }
 
 function submitAddition(vNode: VNode): void {
-  const {parent, parentDom} = findDomParent(vNode);
+  const { parent, parentDom } = findDomParent(vNode);
 
   if (parent.flags.ResetText) {
     // 在insert之前先reset
@@ -244,7 +249,7 @@ function insertOrAppendPlacementNode(
   beforeDom: Element | null,
   parent: Element | Container,
 ): void {
-  const {tag, realNode} = node;
+  const { tag, realNode } = node;
 
   if (isDomVNode(node)) {
     if (beforeDom) {
@@ -291,10 +296,9 @@ function unmountDomComponents(vNode: VNode): void {
     } else {
       unmountVNode(node);
     }
-  }, (node) => {
+  }, node =>
     // 如果是dom不用再遍历child
-    return node.tag === DomComponent || node.tag === DomText;
-  }, null, (node) => {
+    node.tag === DomComponent || node.tag === DomText, null, (node) => {
     if (node.tag === DomPortal) {
       // 当离开portal，需要重新设置parent
       currentParentIsValid = false;
@@ -302,6 +306,43 @@ function unmountDomComponents(vNode: VNode): void {
   });
 }
 
+function submitClear(vNode: VNode): void {
+  const realNode = vNode.realNode;
+  const cloneDom = realNode.cloneNode(false); // 复制节点后horizon添加给dom的属性未能复制
+  // 真实 dom 获取的keys只包含新增的属性
+  // 比如真实 dom 拿到的 keys 一般只有两个 horizon 自定义属性
+  // 但考虑到用户可能自定义其他属性，所以采用遍历赋值的方式
+  const customizeKeys = Object.keys(realNode);
+  const keyLength = customizeKeys.length;
+  for(let i = 0; i < keyLength; i++) {
+    const key = customizeKeys[i];
+    // 测试代码 mock 实例的全部可遍历属性都会被Object.keys方法读取到
+    // children 属性被复制意味着复制了子节点，因此要排除
+    if (key !== 'children') {
+      cloneDom[key] = realNode[key]; // 复制cloneNode未能复制的属性
+    }
+  }
+
+  const parentObj = findDomParent(vNode);
+  const currentParent = parentObj.parentDom;
+  let clearChild = vNode.clearChild as VNode; // 上次渲染的child保存在clearChild属性中
+  // 卸载 clearChild 和 它的兄弟节点
+  while(clearChild) {
+    // 卸载子vNode，递归遍历子vNode
+    unmountNestedVNodes(clearChild);
+    clearVNode(clearChild);
+    clearChild = clearChild.next as VNode;
+  }
+  
+  // 在所有子项都卸载后，删除dom树中的节点
+  removeChildDom(currentParent, vNode.realNode);
+  currentParent.append(cloneDom);
+  vNode.realNode = cloneDom;
+  attachRef(vNode);
+  FlagUtils.removeFlag(vNode, Clear);
+  vNode.clearChild = null;
+}
+
 function submitDeletion(vNode: VNode): void {
   // 遍历所有子节点：删除dom节点，detach ref 和 调用componentWillUnmount()
   unmountDomComponents(vNode);
@@ -348,6 +389,7 @@ export {
   submitResetTextContent,
   submitAddition,
   submitDeletion,
+  submitClear,
   submitUpdate,
   callAfterSubmitLifeCycles,
   attachRef,
diff --git a/libs/horizon/src/renderer/submit/Submit.ts b/libs/horizon/src/renderer/submit/Submit.ts
index 8bdf1266..b7eaa86c 100644
--- a/libs/horizon/src/renderer/submit/Submit.ts
+++ b/libs/horizon/src/renderer/submit/Submit.ts
@@ -9,7 +9,7 @@ import {
   attachRef,
   callAfterSubmitLifeCycles,
   callBeforeSubmitLifeCycles, submitDeletion, submitAddition,
-  submitResetTextContent, submitUpdate, detachRef,
+  submitResetTextContent, submitUpdate, detachRef, submitClear,
 } from './LifeCycleHandler';
 import {tryRenderFromRoot, setProcessing} from '../TreeBuilder';
 import {
@@ -121,7 +121,7 @@ function submit(dirtyNodes: Array<VNode>) {
         }
       }
 
-      const {Addition, Update, Deletion} = node.flags;
+      const {Addition, Update, Deletion, Clear} = node.flags;
       if (Addition && Update) {
         // Addition
         submitAddition(node);
@@ -138,6 +138,9 @@ function submit(dirtyNodes: Array<VNode>) {
         } else if (Deletion) {
           submitDeletion(node);
         }
+        if (Clear) {
+          submitClear(node);
+        }
       }
     } catch (error) {
       throwIfTrue(node === null, 'Should be working on an effect.');
diff --git a/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts b/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
index 4633625f..46bc1fde 100644
--- a/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
+++ b/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
@@ -4,6 +4,7 @@
 
 let isMessageLoopRunning = false;
 let browserCallback = null;
+const { port1, port2 } = new MessageChannel();
 
 
 export function isOverTime() {
@@ -33,7 +34,7 @@ const callRenderTasks = () => {
   }
 };
 
-const { port1, port2 } = new MessageChannel();
+
 port1.onmessage = callRenderTasks;
 
 export function requestBrowserCallback(callback) {
diff --git a/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts b/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
index 9950b369..de3203d8 100644
--- a/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
+++ b/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
@@ -12,20 +12,6 @@ let callingQueueTask: any | null = null;
 // 防止重入
 let isCallingRenderQueue = false;
 
-export function pushRenderCallback(callback: RenderCallback) {
-  if (renderQueue === null) {
-    renderQueue = [callback];
-    // 高优先级的异步调度
-    callingQueueTask = runAsync(callRenderQueue, ImmediatePriority);
-  } else {
-    // 不需要调度，在syncQueue创建的时候已经调度了
-    renderQueue.push(callback);
-  }
-
-  // 返回一个空对象，用于区别null
-  return {};
-}
-
 export function callRenderQueueImmediate() {
   if (callingQueueTask !== null) {
     // 取消异步调度
@@ -56,3 +42,17 @@ function callRenderQueue() {
     }
   }
 }
+
+export function pushRenderCallback(callback: RenderCallback) {
+  if (renderQueue === null) {
+    renderQueue = [callback];
+    // 高优先级的异步调度
+    callingQueueTask = runAsync(callRenderQueue, ImmediatePriority);
+  } else {
+    // 不需要调度，在syncQueue创建的时候已经调度了
+    renderQueue.push(callback);
+  }
+
+  // 返回一个空对象，用于区别null
+  return {};
+}
diff --git a/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts b/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
index fa0a3294..6f8e98e8 100644
--- a/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
+++ b/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
@@ -2,6 +2,7 @@
  * 调度器的核心实现
  */
 
+import { Node } from '../taskExecutor/TaskQueue';
 import {
   requestBrowserCallback,
   isOverTime,
@@ -21,39 +22,11 @@ let isProcessing = false;
 // 调度中，等待浏览器回调
 let isWaiting = false;
 
-function runAsync(callback, priorityLevel= NormalPriority ) {
-  let increment;
-  switch (priorityLevel) {
-    case ImmediatePriority:
-      increment = -1;
-      break;
-    case NormalPriority:
-    default:
-      increment = 10000;
-      break;
-  }
-
-  const task = {
-    id: idCounter++,
-    callback,
-    order: idCounter + increment,
-  };
-
-  add(task);
-
-  if (!isWaiting && !isProcessing) {
-    isWaiting = true;
-    requestBrowserCallback(callTasks);
-  }
-
-  return task;
-}
-
 function callTasks() {
   isWaiting = false;
   isProcessing = true;
 
-  let task = null;
+  let task: Node | null= null;
   try {
     task = first();
 
@@ -89,6 +62,34 @@ function callTasks() {
   }
 }
 
+function runAsync(callback, priorityLevel= NormalPriority ) {
+  let increment;
+  switch (priorityLevel) {
+    case ImmediatePriority:
+      increment = -1;
+      break;
+    case NormalPriority:
+    default:
+      increment = 10000;
+      break;
+  }
+
+  const task = {
+    id: idCounter++,
+    callback,
+    order: idCounter + increment,
+  };
+
+  add(task);
+
+  if (!isWaiting && !isProcessing) {
+    isWaiting = true;
+    requestBrowserCallback(callTasks);
+  }
+
+  return task;
+}
+
 function cancelTask(task) {
   task.callback = null;
 }
diff --git a/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts b/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
index bfb98f79..66478039 100644
--- a/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
+++ b/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
@@ -3,7 +3,7 @@
  */
 
 type Queue = Array<Node>;
-type Node = {
+export type Node = {
   id: number;
   order: number;
 };
@@ -11,15 +11,10 @@ type Node = {
 // 任务队列
 const taskQueue: Queue = [];
 
-export function add(node: Node): void {
-  // 查找第一个大于等于 value 的下标，都比 value 小则返回 -1
-  const idx = getBiggerIdx(node);
-
-  if (idx === -1) {
-    taskQueue.push(node);
-  } else {
-    taskQueue.splice(idx, 0, node);
-  }
+function compare(a: Node, b: Node) {
+  // 优先先用index排序，其次用id
+  const diff = a.order - b.order;
+  return diff !== 0 ? diff : a.id - b.id;
 }
 
 // 二分法查找第一个大于等于 value 的下标，都比 value 小则返回 -1，时间复杂度O(logn)
@@ -37,11 +32,22 @@ function getBiggerIdx(node: Node) {
     }
   }
 
-  return (left < taskQueue.length) ? left : -1;
+  return left < taskQueue.length ? left : -1;
+}
+
+export function add(node: Node): void {
+  // 查找第一个大于等于 value 的下标，都比 value 小则返回 -1
+  const idx = getBiggerIdx(node);
+
+  if (idx === -1) {
+    taskQueue.push(node);
+  } else {
+    taskQueue.splice(idx, 0, node);
+  }
 }
 
 export function first(): Node | null {
-  const val = taskQueue[0];
+  const val: Node | null | undefined = taskQueue[0];
   return val !== undefined ? val : null;
 }
 
@@ -53,9 +59,3 @@ export function shift(): Node | null {
 export function remove(node: Node) {
   taskQueue.splice(taskQueue.indexOf(node), 1);
 }
-
-function compare(a: Node, b: Node) {
-  // 优先先用index排序，其次用id
-  const diff = a.order - b.order;
-  return diff !== 0 ? diff : a.id - b.id;
-}
diff --git a/libs/horizon/src/renderer/utils/compare.ts b/libs/horizon/src/renderer/utils/compare.ts
index 3849ec85..e6fb69a1 100644
--- a/libs/horizon/src/renderer/utils/compare.ts
+++ b/libs/horizon/src/renderer/utils/compare.ts
@@ -42,9 +42,9 @@ export function shallowCompare(paramX: any, paramY: any): boolean {
       return false;
     }
 
-    return keysX.every((key, i) => {
-      return Object.prototype.hasOwnProperty.call(paramY, key) && isSame(paramX[key], paramY[keysX[i]]);
-    });
+    return keysX.every((key, i) =>
+      Object.prototype.hasOwnProperty.call(paramY, key) && isSame(paramX[key], paramY[keysX[i]])
+    );
   }
 
    return false;
diff --git a/libs/horizon/src/renderer/vnode/VNode.ts b/libs/horizon/src/renderer/vnode/VNode.ts
index 810c7fb5..e5a848de 100644
--- a/libs/horizon/src/renderer/vnode/VNode.ts
+++ b/libs/horizon/src/renderer/vnode/VNode.ts
@@ -49,19 +49,20 @@ export class VNode {
   // 因为LazyComponent会修改type属性，为了在diff中判断是否可以复用，需要增加一个lazyType
   lazyType: any = null;
   flags: {
-    Addition?: boolean,
-    Update?: boolean,
-    Deletion?: boolean,
-    ResetText?: boolean,
-    Callback?: boolean,
-    DidCapture?: boolean,
-    Ref?: boolean,
-    Snapshot?: boolean,
-    Interrupted?: boolean,
-    ShouldCapture?: boolean,
-    ForceUpdate?: boolean,
+    Addition?: boolean;
+    Update?: boolean;
+    Deletion?: boolean;
+    ResetText?: boolean;
+    Callback?: boolean;
+    DidCapture?: boolean;
+    Ref?: boolean;
+    Snapshot?: boolean;
+    Interrupted?: boolean;
+    ShouldCapture?: boolean;
+    ForceUpdate?: boolean;
+    Clear?: boolean;
   } = {};
-
+  clearChild: VNode | null = null;
   // one tree相关属性
   isCreated: boolean = true;
   oldHooks: Array<Hook<any, any>> = []; // 保存上一次执行的hook
diff --git a/libs/horizon/src/renderer/vnode/VNodeCreator.ts b/libs/horizon/src/renderer/vnode/VNodeCreator.ts
index 45648678..5feb31f4 100644
--- a/libs/horizon/src/renderer/vnode/VNodeCreator.ts
+++ b/libs/horizon/src/renderer/vnode/VNodeCreator.ts
@@ -175,7 +175,7 @@ export function onlyUpdateChildVNodes(processing: VNode): VNode | null {
     // 此vNode无需更新，但是子树需要
     if (!processing.isCreated && processing.child !== null) {
       // 更新子节点
-      let child = processing.child;
+      let child: VNode | null = processing.child;
       while (child !== null) {
         updateVNode(child, child.props);
         updateVNodePath(child);
diff --git a/libs/horizon/src/renderer/vnode/VNodeFlags.ts b/libs/horizon/src/renderer/vnode/VNodeFlags.ts
index 15e25131..f511ac85 100644
--- a/libs/horizon/src/renderer/vnode/VNodeFlags.ts
+++ b/libs/horizon/src/renderer/vnode/VNodeFlags.ts
@@ -18,8 +18,10 @@ export const Interrupted = 'Interrupted';
 export const ShouldCapture = 'ShouldCapture';
 // For suspense
 export const ForceUpdate = 'ForceUpdate';
+export const Clear = 'Clear';
 
-const FlagArr = [Addition, Update, Deletion, ResetText, Callback, DidCapture, Ref, Snapshot, Interrupted, ShouldCapture, ForceUpdate];
+const FlagArr = [Addition, Update, Deletion, Clear, ResetText, Callback,
+  DidCapture, Ref, Snapshot, Interrupted, ShouldCapture, ForceUpdate];
 
 const LifecycleEffectArr = [Update, Callback, Ref, Snapshot];
 
@@ -89,5 +91,9 @@ export class FlagUtils {
   static markForceUpdate(node: VNode) {
     node.flags.ForceUpdate = true;
   }
+
+  static markClear(node: VNode) {
+    node.flags.Clear = true;
+  }
 }
 
diff --git a/libs/horizon/src/renderer/vnode/VNodeShouldUpdate.ts b/libs/horizon/src/renderer/vnode/VNodeShouldUpdate.ts
index d0f27198..8dfe8c7e 100644
--- a/libs/horizon/src/renderer/vnode/VNodeShouldUpdate.ts
+++ b/libs/horizon/src/renderer/vnode/VNodeShouldUpdate.ts
@@ -37,6 +37,19 @@ export function updateChildShouldUpdate(vNode: VNode) {
   vNode.childShouldUpdate = false;
 }
 
+// 更新从当前节点到根节点的childShouldUpdate为true
+export function setParentsChildShouldUpdate(parent: VNode | null) {
+  let node = parent;
+  while (node !== null) {
+    if (node.childShouldUpdate) {
+      break;
+    }
+    node.childShouldUpdate = true;
+
+    node = node.parent;
+  }
+}
+
 // 设置节点的所有父节点的childShouldUpdate
 export function updateParentsChildShouldUpdate(vNode: VNode) {
   let node = vNode.parent;
@@ -51,16 +64,3 @@ export function updateParentsChildShouldUpdate(vNode: VNode) {
     }
   }
 }
-
-// 更新从当前节点到根节点的childShouldUpdate为true
-export function setParentsChildShouldUpdate(parent: VNode | null) {
-  let node = parent;
-  while (node !== null) {
-    if (node.childShouldUpdate) {
-      break;
-    }
-    node.childShouldUpdate = true;
-
-    node = node.parent;
-  }
-}