diff --git a/libs/horizon/src/dom/SelectionRangeHandler.ts b/libs/horizon/src/dom/SelectionRangeHandler.ts
index d4f98942..f5bde5bf 100644
--- a/libs/horizon/src/dom/SelectionRangeHandler.ts
+++ b/libs/horizon/src/dom/SelectionRangeHandler.ts
@@ -73,6 +73,7 @@ function isInDocument(dom) {
   if (dom && dom.ownerDocument) {
     return isNodeContainsByTargetNode(dom.ownerDocument.documentElement, dom);
   }
+  return false;
 }
 
 // 判断一个标签是否有设置选择范围的能力
diff --git a/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts b/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
index 35d31e20..34406ef8 100644
--- a/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
+++ b/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
@@ -34,12 +34,12 @@ export function watchValueChange(dom) {
     // currentVal存储最新值，并重写value的setter、getter
     let currentVal = String(dom[keyForValue]);
 
-    const setFunc = descriptor.set;
+    const setFunc = descriptor?.set;
     Object.defineProperty(dom, keyForValue, {
       ...descriptor,
-      set: function (value) {
+      set: function(value) {
         currentVal = String(value);
-        setFunc.apply(this, [value]);
+        setFunc?.apply(this, [value]);
       },
     });
 
diff --git a/libs/horizon/src/external/ChildrenUtil.ts b/libs/horizon/src/external/ChildrenUtil.ts
index 179cf73e..d46e217b 100644
--- a/libs/horizon/src/external/ChildrenUtil.ts
+++ b/libs/horizon/src/external/ChildrenUtil.ts
@@ -46,8 +46,8 @@ function mapChildrenToArray(
       throw new Error(
         'Object is invalid as a Horizon child. '
       );
-    default:
-      return;
+      
+    // No Default
   }
 }
 
diff --git a/libs/horizon/src/renderer/TreeBuilder.ts b/libs/horizon/src/renderer/TreeBuilder.ts
index a628048b..0d3bfa9e 100644
--- a/libs/horizon/src/renderer/TreeBuilder.ts
+++ b/libs/horizon/src/renderer/TreeBuilder.ts
@@ -219,7 +219,7 @@ export function tryRenderRoot(treeRoot: VNode) {
 }
 
 // 发起更新
-export function launchUpdateFromVNode(vNode: VNode): null | void {
+export function launchUpdateFromVNode(vNode: VNode) {
   // 检查循环调用
   checkLoopingUpdateLimit();
 
@@ -228,7 +228,7 @@ export function launchUpdateFromVNode(vNode: VNode): null | void {
   if (treeRoot === null) {
     // 可能场景是：the componentWillUnmount method 或 useEffect cleanup function 方法中写异步任务，并且修改state。
     // 因为异步回调的时候root都可能被清除了。
-    return null;
+    return;
   }
 
   // 保存待刷新的节点
diff --git a/libs/horizon/src/renderer/diff/DiffTools.ts b/libs/horizon/src/renderer/diff/DiffTools.ts
index 928f889b..c2b44411 100644
--- a/libs/horizon/src/renderer/diff/DiffTools.ts
+++ b/libs/horizon/src/renderer/diff/DiffTools.ts
@@ -6,7 +6,7 @@ export const isSameType = (vNode: VNode, ele: HorizonElement) => {
   return vNode.type === ele.type || (vNode.isLazyComponent && vNode.lazyType === ele.type);
 };
 
-export function createRef(element: HorizonElement) {
+export function createRef(element: HorizonElement): any | void {
   const elementRef = element.ref;
   // 如果ref是null、function、object，直接返回
   if (elementRef === null || typeof elementRef === 'function' || typeof elementRef === 'object') {
diff --git a/libs/horizon/src/renderer/hooks/UseEffectHook.ts b/libs/horizon/src/renderer/hooks/UseEffectHook.ts
index ccd4e7d4..d3418782 100644
--- a/libs/horizon/src/renderer/hooks/UseEffectHook.ts
+++ b/libs/horizon/src/renderer/hooks/UseEffectHook.ts
@@ -31,9 +31,9 @@ function useEffect(
   }
 
   if (stage === HookStage.Init) {
-    return useEffectForInit(effectFunc, deps, effectType);
+    useEffectForInit(effectFunc, deps, effectType);
   } else if (stage === HookStage.Update) {
-    return useEffectForUpdate(effectFunc, deps, effectType);
+    useEffectForUpdate(effectFunc, deps, effectType);
   }
 }
 
diff --git a/libs/horizon/src/renderer/render/LazyComponent.ts b/libs/horizon/src/renderer/render/LazyComponent.ts
index 65f7285c..f3dcc954 100644
--- a/libs/horizon/src/renderer/render/LazyComponent.ts
+++ b/libs/horizon/src/renderer/render/LazyComponent.ts
@@ -1,23 +1,23 @@
-import type {VNode} from '../Types';
+import type { VNode } from '../Types';
 
-import {FlagUtils} from '../vnode/VNodeFlags';
-import {getLazyVNodeTag} from '../vnode/VNodeCreator';
+import { FlagUtils } from '../vnode/VNodeFlags';
+import { getLazyVNodeTag } from '../vnode/VNodeCreator';
 import {
   ClassComponent,
   ForwardRef,
   FunctionComponent,
   MemoComponent,
 } from '../vnode/VNodeTags';
-import {throwIfTrue} from '../utils/throwIfTrue';
-import {captureFunctionComponent} from './FunctionComponent';
-import {captureClassComponent} from './ClassComponent';
-import {captureMemoComponent} from './MemoComponent';
+import { throwIfTrue } from '../utils/throwIfTrue';
+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() {}
+export function bubbleRender() { }
 
 const LazyRendererMap = {
   [FunctionComponent]: captureFunctionComponent,
@@ -64,12 +64,13 @@ function captureLazyComponent(
       Component,
       '',
     );
+    return null;
   }
 }
 
 export function mergeDefaultProps(Component: any, props: object): object {
   if (Component && Component.defaultProps) {
-    const clonedProps = {...props};
+    const clonedProps = { ...props };
     const defaultProps = Component.defaultProps;
     Object.keys(defaultProps).forEach(key => {
       if (clonedProps[key] === undefined) {
diff --git a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
index 779f3653..d2eafa4c 100644
--- a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
+++ b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
@@ -70,8 +70,9 @@ function callBeforeSubmitLifeCycles(
     case TreeRoot: {
       const root = vNode.realNode;
       clearContainer(root.outerDom);
-      return;
     }
+    
+    // No Default
   }
 }
 
@@ -136,8 +137,9 @@ function callAfterSubmitLifeCycles(
           vNode.realNode.focus();
         }
       }
-      return;
     }
+
+    // No Default
   }
 }
 
diff --git a/libs/horizon/src/renderer/vnode/VNodeUtils.ts b/libs/horizon/src/renderer/vnode/VNodeUtils.ts
index 0183dd67..3251cb7d 100644
--- a/libs/horizon/src/renderer/vnode/VNodeUtils.ts
+++ b/libs/horizon/src/renderer/vnode/VNodeUtils.ts
@@ -144,6 +144,7 @@ export function findDomVNode(vNode: VNode): VNode | null {
     if (node.tag === DomComponent || node.tag === DomText) {
       return node;
     }
+    return null;
   });
 }