diff --git a/lib/block/base/content.ts b/lib/block/base/content.ts
index 4199275..54b8d3f 100644
--- a/lib/block/base/content.ts
+++ b/lib/block/base/content.ts
@@ -22,7 +22,7 @@ class Content extends TreeNode {
   public _text: string;
   public isComposed: boolean;
 
-  static blockName = 'content';
+  static override blockName = 'content';
 
   get hasSelection() {
     return !!this.getCursor();
@@ -197,7 +197,7 @@ class Content extends TreeNode {
     }
   }
 
-  createDomNode() {
+  override createDomNode() {
     super.createDomNode();
     this.update();
   }
@@ -537,7 +537,7 @@ class Content extends TreeNode {
     return commonAncestors;
   }
 
-  remove(source = 'user') {
+  override remove(source = 'user') {
     super.remove(source);
 
     return this;
diff --git a/lib/block/base/format.ts b/lib/block/base/format.ts
index f2cdef7..82969eb 100644
--- a/lib/block/base/format.ts
+++ b/lib/block/base/format.ts
@@ -211,7 +211,7 @@ const checkTokenIsInlineFormat = (token: Token) => {
 };
 
 class Format extends Content {
-  static blockName = 'format';
+  static override blockName = 'format';
 
   private _checkCursorInTokenType(
     text: string,
@@ -325,7 +325,7 @@ class Format extends Content {
     return false;
   }
 
-  blurHandler() {
+  override blurHandler() {
     super.blurHandler();
     const needRender = this.checkNeedRender();
     if (needRender) {
@@ -450,7 +450,7 @@ class Format extends Content {
     eventCenter.emit('muya-image-toolbar', { reference: null });
   }
 
-  clickHandler(event: Event): void {
+  override clickHandler(event: Event): void {
     if (!isMouseEvent(event)) {
       return;
     }
@@ -506,7 +506,7 @@ class Format extends Content {
     });
   }
 
-  keyupHandler(): void {
+  override keyupHandler(): void {
     if (this.isComposed) {
       return;
     }
@@ -561,7 +561,7 @@ class Format extends Content {
     }
   }
 
-  inputHandler(event: Event): void {
+  override inputHandler(event: Event): void {
     // Do not use `isInputEvent` util, because compositionEnd event also invoke this method.
     if (
       this.isComposed ||
@@ -1237,7 +1237,7 @@ class Format extends Content {
     }
   }
 
-  backspaceHandler(event: Event): void {
+  override backspaceHandler(event: Event): void {
     const { start, end } = this.getCursor() ?? {};
     // Let input handler to handle this case.
     if (!start || !end || start?.offset !== end?.offset) {
@@ -1317,7 +1317,7 @@ class Format extends Content {
     }
   }
 
-  deleteHandler(event: KeyboardEvent): void {
+  override deleteHandler(event: KeyboardEvent): void {
     const { start, end } = this.getCursor()!;
     const { text } = this;
     // Let input handler to handle this case.
@@ -1358,7 +1358,7 @@ class Format extends Content {
     this.setCursor(start.offset + 1, end.offset + 1, true);
   }
 
-  enterHandler(event: KeyboardEvent): void {
+  override enterHandler(event: KeyboardEvent): void {
     event.preventDefault();
     const { text: oldText, muya, parent } = this;
     const { start, end } = this.getCursor()!;
diff --git a/lib/block/base/linkedList/linkedList.ts b/lib/block/base/linkedList/linkedList.ts
index fd30c79..d32fc8e 100644
--- a/lib/block/base/linkedList/linkedList.ts
+++ b/lib/block/base/linkedList/linkedList.ts
@@ -1,17 +1,20 @@
-import LinkedNode from './linkedNode';
+import { Nullable } from '@muya/types';
+import type { LinkedNode } from './linkedNode';
 
-class LinkedList<T extends LinkedNode<T>> {
-  public head: T | null = null;
-  public tail: T | null = null;
-  public length: number = 0;
+class LinkedList<T extends LinkedNode> {
+  head: Nullable<T> = null;
 
-  *iterator(curNode: T | null = this.head, length = this.length) {
+  tail: Nullable<T> = null;
+
+  length: number = 0;
+
+  *iterator(curNode = this.head, length = this.length) {
     let count = 0;
 
     while (count < length && curNode) {
       yield curNode;
       count++;
-      curNode = curNode.next;
+      curNode = curNode.next as T;
     }
   }
 
@@ -74,11 +77,11 @@ class LinkedList<T extends LinkedNode<T>> {
     }
 
     if (this.head === node) {
-      this.head = node.next;
+      this.head = node.next as T;
     }
 
     if (this.tail === node) {
-      this.tail = node.prev;
+      this.tail = node.prev as T;
     }
     this.length -= 1;
   }
@@ -95,7 +98,11 @@ class LinkedList<T extends LinkedNode<T>> {
     return [...this.iterator()].forEach(callback);
   }
 
-  forEachAt(index: number, length: number = this.length, callback: (cur: T, i: number) => void) {
+  forEachAt(
+    index: number,
+    length: number = this.length,
+    callback: (cur: T, i: number) => void
+  ) {
     const curNode = this.find(index);
 
     return [...this.iterator(curNode, length)].forEach((node, i) => {
diff --git a/lib/block/base/linkedList/linkedNode.ts b/lib/block/base/linkedList/linkedNode.ts
index 05aab73..be32fde 100644
--- a/lib/block/base/linkedList/linkedNode.ts
+++ b/lib/block/base/linkedList/linkedNode.ts
@@ -1,8 +1,7 @@
 import { Nullable } from '@muya/types';
 
-class LinkedNode<T> {
-  public prev: Nullable<T> = null;
-  public next: Nullable<T> = null;
-}
+export interface LinkedNode {
+  prev: Nullable<LinkedNode>;
 
-export default LinkedNode;
+  next: Nullable<LinkedNode>;
+}
diff --git a/lib/block/base/parent.ts b/lib/block/base/parent.ts
index 953149f..43961e6 100644
--- a/lib/block/base/parent.ts
+++ b/lib/block/base/parent.ts
@@ -11,10 +11,13 @@ const debug = logger('parent:');
 
 class Parent extends TreeNode {
   // Used to store icon, checkbox(span) etc. these blocks are not in children properties in json state.
-  public attachments: LinkedList<Parent> = new LinkedList();
-  public children: LinkedList<TreeNode> = new LinkedList();
-  public prev: Nullable<Parent> = null;
-  public next: Nullable<Parent> = null;
+  attachments: LinkedList<Parent> = new LinkedList();
+
+  children: LinkedList<TreeNode> = new LinkedList();
+
+  override prev: Nullable<Parent> = null;
+
+  override next: Nullable<Parent> = null;
 
   private _active: boolean = false;
 
@@ -209,7 +212,7 @@ class Parent extends TreeNode {
     return newNode;
   }
 
-  remove(source = 'user') {
+  override remove(source = 'user') {
     if (source === 'user') {
       // dispatch json1 operation
       const path = this.getJsonPath();
diff --git a/lib/block/base/treeNode.ts b/lib/block/base/treeNode.ts
index 02b78de..108a4b6 100644
--- a/lib/block/base/treeNode.ts
+++ b/lib/block/base/treeNode.ts
@@ -1,4 +1,3 @@
-import LinkedNode from '@muya/block/base/linkedList/linkedNode';
 import { BLOCK_DOM_PROPERTY } from '@muya/config';
 import Muya from '@muya/index';
 import type { TState } from '@muya/state/types';
@@ -6,6 +5,7 @@ import { Nullable } from '@muya/types';
 import { createDomNode } from '@muya/utils/dom';
 import type { Attributes, Datasets } from '@muya/utils/types';
 import Content from './content';
+import type { LinkedNode } from './linkedList/linkedNode';
 import Parent from './parent';
 
 interface IConstructor<T> {
@@ -14,18 +14,22 @@ interface IConstructor<T> {
   new (muya: Muya): T;
 }
 
-class TreeNode extends LinkedNode<TreeNode> {
-  public parent: Nullable<Parent> = null;
+class TreeNode implements LinkedNode {
+  prev: Nullable<TreeNode> = null;
 
-  public domNode: Nullable<HTMLElement> = null;
+  next: Nullable<TreeNode> = null;
 
-  public tagName: string = '';
+  parent: Nullable<Parent> = null;
 
-  public classList: string[] = [];
+  domNode: Nullable<HTMLElement> = null;
 
-  public attributes: Attributes = {};
+  tagName: string = '';
 
-  public datasets: Datasets = {};
+  classList: string[] = [];
+
+  attributes: Attributes = {};
+
+  datasets: Datasets = {};
 
   static blockName = 'tree.node';
 
@@ -53,8 +57,8 @@ class TreeNode extends LinkedNode<TreeNode> {
     return this.parent ? this.parent.isScrollPage : false;
   }
 
-  get outMostBlock(): this | Parent | null {
-    let node = this.isContent() ? this.parent : this;
+  get outMostBlock(): Nullable<Parent> {
+    let node = this.isContent() ? this.parent : this as unknown as Parent;
 
     while (node) {
       if (node.isOutMostBlock) {
@@ -66,27 +70,25 @@ class TreeNode extends LinkedNode<TreeNode> {
     return null;
   }
 
-  constructor(public muya: Muya) {
-    super();
-  }
+  constructor(public muya: Muya) {}
 
-    /**
+  /**
    * check this is a Content block?
    * @param this
    * @returns boolean
    */
-    isContent(this: TreeNode): this is Content {
-      return 'text' in this;
-    }
-  
-    /**
-     * check this is a Parent block?
-     * @param this
-     * @returns boolean
-     */
-    isParent(this: unknown): this is Parent {
-      return this instanceof Parent;
-    }
+  isContent(this: TreeNode): this is Content {
+    return 'text' in this;
+  }
+
+  /**
+   * check this is a Parent block?
+   * @param this
+   * @returns boolean
+   */
+  isParent(this: unknown): this is Parent {
+    return this instanceof Parent;
+  }
 
   /**
    * create domNode
diff --git a/lib/block/commonMark/atxHeading/index.ts b/lib/block/commonMark/atxHeading/index.ts
index 6f7da9f..51a2d31 100644
--- a/lib/block/commonMark/atxHeading/index.ts
+++ b/lib/block/commonMark/atxHeading/index.ts
@@ -11,7 +11,7 @@ import { IAtxHeadingState } from '../../../state/types';
 class AtxHeading extends Parent {
   public meta: IAtxHeadingState['meta'];
 
-  static blockName = 'atx-heading';
+  static override blockName = 'atx-heading';
 
   static create(muya: Muya, state: IAtxHeadingState) {
     const heading = new AtxHeading(muya, state);
@@ -23,7 +23,7 @@ class AtxHeading extends Parent {
     return heading;
   }
 
-  get path(): TBlockPath {
+  override get path(): TBlockPath {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -38,7 +38,7 @@ class AtxHeading extends Parent {
     this.createDomNode();
   }
 
-  getState(): IAtxHeadingState {
+  override getState(): IAtxHeadingState {
     return {
       name: 'atx-heading',
       meta: this.meta,
diff --git a/lib/block/commonMark/blockQuote/index.ts b/lib/block/commonMark/blockQuote/index.ts
index e234d8e..9bd0cf0 100644
--- a/lib/block/commonMark/blockQuote/index.ts
+++ b/lib/block/commonMark/blockQuote/index.ts
@@ -7,7 +7,7 @@ import { IBlockQuoteState } from '../../../state/types';
 
 @mixins(ContainerQueryBlock)
 class BlockQuote extends Parent {
-  static blockName = 'block-quote';
+  static override blockName = 'block-quote';
 
   static create(muya: Muya, state: IBlockQuoteState) {
     const blockQuote = new BlockQuote(muya);
@@ -19,7 +19,7 @@ class BlockQuote extends Parent {
     return blockQuote;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -33,7 +33,7 @@ class BlockQuote extends Parent {
     this.createDomNode();
   }
 
-  getState(): IBlockQuoteState {
+  override getState(): IBlockQuoteState {
     const state: IBlockQuoteState = {
       name: 'block-quote',
       children: this.children.map((child) => (child as Parent).getState()),
diff --git a/lib/block/commonMark/bulletList/index.ts b/lib/block/commonMark/bulletList/index.ts
index 48acd56..910894b 100644
--- a/lib/block/commonMark/bulletList/index.ts
+++ b/lib/block/commonMark/bulletList/index.ts
@@ -8,9 +8,9 @@ import { mixins } from '@muya/utils';
 
 @mixins(ContainerQueryBlock)
 class BulletList extends Parent {
-  public children: LinkedList<Parent> = new LinkedList();
+  public override children: LinkedList<Parent> = new LinkedList();
 
-  static blockName = 'bullet-list';
+  static override blockName = 'bullet-list';
 
   static create(muya: Muya, state: IBulletListState) {
     const bulletList = new BulletList(muya, state);
@@ -24,7 +24,7 @@ class BulletList extends Parent {
     return bulletList;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -47,7 +47,7 @@ class BulletList extends Parent {
     this.createDomNode();
   }
 
-  getState(): IBulletListState {
+  override getState(): IBulletListState {
     const state: IBulletListState = {
       name: 'bullet-list',
       meta: { ...this.meta },
diff --git a/lib/block/commonMark/codeBlock/code.ts b/lib/block/commonMark/codeBlock/code.ts
index 928a35d..8dc7030 100644
--- a/lib/block/commonMark/codeBlock/code.ts
+++ b/lib/block/commonMark/codeBlock/code.ts
@@ -40,9 +40,9 @@ const renderCopyButton = (i18n: I18n) => {
 };
 
 class Code extends Parent {
-  public parent: Nullable<CodeBlock> = null;
+  public override parent: Nullable<CodeBlock> = null;
 
-  static blockName = 'code';
+  static override blockName = 'code';
 
   static create(muya: Muya, state: ICodeBlockState) {
     const code = new Code(muya);
@@ -52,7 +52,7 @@ class Code extends Parent {
     return code;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
 
     return [...pPath];
@@ -67,7 +67,7 @@ class Code extends Parent {
     this.listen();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in code');
     return {} as TState;
   }
diff --git a/lib/block/commonMark/codeBlock/index.ts b/lib/block/commonMark/codeBlock/index.ts
index a626a14..f990e7f 100644
--- a/lib/block/commonMark/codeBlock/index.ts
+++ b/lib/block/commonMark/codeBlock/index.ts
@@ -13,7 +13,7 @@ const debug = logger('codeblock:');
 
 class CodeBlock extends Parent {
   public meta: ICodeBlockState['meta'];
-  static blockName = 'code-block';
+  static override blockName = 'code-block';
 
   static create(muya: Muya, state: ICodeBlockState) {
     const codeBlock = new CodeBlock(muya, state);
@@ -76,7 +76,7 @@ class CodeBlock extends Parent {
         });
   }
 
-  get path(): TBlockPath {
+  override get path(): TBlockPath {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -105,7 +105,7 @@ class CodeBlock extends Parent {
     }
   }
 
-  getState(): ICodeBlockState {
+  override getState(): ICodeBlockState {
     const state: ICodeBlockState = {
       name: 'code-block',
       meta: { ...this.meta },
diff --git a/lib/block/commonMark/html/htmlContainer.ts b/lib/block/commonMark/html/htmlContainer.ts
index eea5788..6b750fa 100644
--- a/lib/block/commonMark/html/htmlContainer.ts
+++ b/lib/block/commonMark/html/htmlContainer.ts
@@ -7,7 +7,7 @@ import { IHtmlBlockState, TState } from '../../../state/types';
 const debug = logger('htmlContainer:');
 
 class HTMLContainer extends Parent {
-  static blockName = 'html-container';
+  static override blockName = 'html-container';
 
   static create(muya: Muya, state: IHtmlBlockState) {
     const htmlContainer = new HTMLContainer(muya);
@@ -23,7 +23,7 @@ class HTMLContainer extends Parent {
     return 'markup';
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
 
     return [...pPath];
@@ -36,7 +36,7 @@ class HTMLContainer extends Parent {
     this.createDomNode();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in htmlContainer');
     return {} as TState;
   }
diff --git a/lib/block/commonMark/html/htmlPreview.ts b/lib/block/commonMark/html/htmlPreview.ts
index 2c6d5ac..15cee4a 100644
--- a/lib/block/commonMark/html/htmlPreview.ts
+++ b/lib/block/commonMark/html/htmlPreview.ts
@@ -11,7 +11,7 @@ const debug = logger('htmlPreview:');
 class HTMLPreview extends Parent {
   public html: string;
 
-  static blockName = 'html-preview';
+  static override blockName = 'html-preview';
 
   static create(muya: Muya, state: IHtmlBlockState) {
     const htmlBlock = new HTMLPreview(muya, state);
@@ -19,7 +19,7 @@ class HTMLPreview extends Parent {
     return htmlBlock;
   }
 
-  get path() {
+  override get path() {
     debug.warn('You can never call `get path` in htmlPreview');
     return [];
   }
@@ -65,7 +65,7 @@ class HTMLPreview extends Parent {
     }
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in htmlPreview');
     return {} as TState;
   }
diff --git a/lib/block/commonMark/html/index.ts b/lib/block/commonMark/html/index.ts
index 82d1cd1..99f242f 100644
--- a/lib/block/commonMark/html/index.ts
+++ b/lib/block/commonMark/html/index.ts
@@ -6,7 +6,7 @@ import Muya from '@muya/index';
 import { IHtmlBlockState } from '../../../state/types';
 
 class HTMLBlock extends Parent {
-  static blockName = 'html-block';
+  static override blockName = 'html-block';
 
   static create(muya: Muya, state: IHtmlBlockState) {
     const htmlBlock = new HTMLBlock(muya);
@@ -26,7 +26,7 @@ class HTMLBlock extends Parent {
     return htmlBlock;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -50,7 +50,7 @@ class HTMLBlock extends Parent {
       : this;
   }
 
-  getState(): IHtmlBlockState {
+  override getState(): IHtmlBlockState {
     const state: IHtmlBlockState = {
       name: 'html-block',
       text: this.firstContentInDescendant()?.text ?? '',
diff --git a/lib/block/commonMark/listItem/index.ts b/lib/block/commonMark/listItem/index.ts
index 368eeee..734c2a7 100644
--- a/lib/block/commonMark/listItem/index.ts
+++ b/lib/block/commonMark/listItem/index.ts
@@ -8,9 +8,9 @@ import { IListItemState } from '../../../state/types';
 
 @mixins(ContainerQueryBlock)
 class ListItem extends Parent {
-  public children: LinkedList<Parent> = new LinkedList();
+  public override children: LinkedList<Parent> = new LinkedList();
 
-  static blockName = 'list-item';
+  static override blockName = 'list-item';
 
   static create(muya: Muya, state: IListItemState) {
     const listItem = new ListItem(muya);
@@ -24,7 +24,7 @@ class ListItem extends Parent {
     return listItem;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -38,7 +38,7 @@ class ListItem extends Parent {
     this.createDomNode();
   }
 
-  getState(): IListItemState {
+  override getState(): IListItemState {
     const state: IListItemState = {
       name: 'list-item',
       children: this.children.map((child) => child.getState()),
diff --git a/lib/block/commonMark/orderList/index.ts b/lib/block/commonMark/orderList/index.ts
index 4e7a197..8e7245e 100644
--- a/lib/block/commonMark/orderList/index.ts
+++ b/lib/block/commonMark/orderList/index.ts
@@ -9,10 +9,10 @@ import ListItem from '../listItem';
 
 @mixins(ContainerQueryBlock)
 class OrderList extends Parent {
-  public children: LinkedList<Parent> = new LinkedList();
+  public override children: LinkedList<Parent> = new LinkedList();
   public meta: IOrderListState['meta'];
 
-  static blockName = 'order-list';
+  static override blockName = 'order-list';
 
   static create(muya: Muya, state: IOrderListState) {
     const orderList = new OrderList(muya, state);
@@ -26,7 +26,7 @@ class OrderList extends Parent {
     return orderList;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -46,7 +46,7 @@ class OrderList extends Parent {
     this.createDomNode();
   }
 
-  getState(): IOrderListState {
+  override getState(): IOrderListState {
     const state: IOrderListState = {
       name: 'order-list',
       meta: { ...this.meta },
diff --git a/lib/block/commonMark/paragraph/index.ts b/lib/block/commonMark/paragraph/index.ts
index 15a26a2..b96c9c8 100644
--- a/lib/block/commonMark/paragraph/index.ts
+++ b/lib/block/commonMark/paragraph/index.ts
@@ -8,7 +8,7 @@ import { IParagraphState } from '../../../state/types';
 
 @mixins(LeafQueryBlock)
 class Paragraph extends Parent {
-  static blockName = 'paragraph';
+  static override blockName = 'paragraph';
 
   static create(muya: Muya, state: IParagraphState) {
     const paragraph = new Paragraph(muya);
@@ -20,7 +20,7 @@ class Paragraph extends Parent {
     return paragraph;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -34,7 +34,7 @@ class Paragraph extends Parent {
     this.createDomNode();
   }
 
-  getState(): IParagraphState {
+  override getState(): IParagraphState {
     return {
       name: 'paragraph',
       text: (this.children.head as ParagraphContent).text,
diff --git a/lib/block/commonMark/setextHeading/index.ts b/lib/block/commonMark/setextHeading/index.ts
index 1778a97..1db66c1 100644
--- a/lib/block/commonMark/setextHeading/index.ts
+++ b/lib/block/commonMark/setextHeading/index.ts
@@ -10,7 +10,7 @@ import { ISetextHeadingState } from '../../../state/types';
 class SetextHeading extends Parent {
   public meta: ISetextHeadingState['meta'];
 
-  static blockName = 'setext-heading';
+  static override blockName = 'setext-heading';
 
   static create(muya: Muya, state: ISetextHeadingState) {
     const heading = new SetextHeading(muya, state);
@@ -22,7 +22,7 @@ class SetextHeading extends Parent {
     return heading;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -37,7 +37,7 @@ class SetextHeading extends Parent {
     this.createDomNode();
   }
 
-  getState(): ISetextHeadingState {
+  override getState(): ISetextHeadingState {
     return {
       name: 'setext-heading',
       meta: this.meta,
diff --git a/lib/block/commonMark/thematicBreak/index.ts b/lib/block/commonMark/thematicBreak/index.ts
index 427bf55..026bef4 100644
--- a/lib/block/commonMark/thematicBreak/index.ts
+++ b/lib/block/commonMark/thematicBreak/index.ts
@@ -8,7 +8,7 @@ import { IThematicBreakState } from '../../../state/types';
 
 @mixins(LeafQueryBlock)
 class ThematicBreak extends Parent {
-  static blockName = 'thematic-break';
+  static override blockName = 'thematic-break';
 
   static create(muya: Muya, state: IThematicBreakState) {
     const heading = new ThematicBreak(muya);
@@ -20,7 +20,7 @@ class ThematicBreak extends Parent {
     return heading;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -34,7 +34,7 @@ class ThematicBreak extends Parent {
     this.createDomNode();
   }
 
-  getState(): IThematicBreakState {
+  override getState(): IThematicBreakState {
     return {
       name: 'thematic-break',
       text: (this.children.head as ThematicBreakContent).text,
diff --git a/lib/block/content/atxHeadingContent/index.ts b/lib/block/content/atxHeadingContent/index.ts
index 28daee6..86f1a1f 100644
--- a/lib/block/content/atxHeadingContent/index.ts
+++ b/lib/block/content/atxHeadingContent/index.ts
@@ -5,9 +5,9 @@ import Muya from '@muya/index';
 import { Cursor } from '@muya/selection/types';
 
 class AtxHeadingContent extends Format {
-  public parent: AtxHeading | null = null;
+  public override parent: AtxHeading | null = null;
 
-  static blockName = 'atxheading.content';
+  static override blockName = 'atxheading.content';
 
   static create(muya: Muya, text: string) {
     const content = new AtxHeadingContent(muya, text);
@@ -21,15 +21,15 @@ class AtxHeadingContent extends Format {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.parent;
   }
 
-  update(cursor: Cursor, highlights = []) {
+  override update(cursor: Cursor, highlights = []) {
     return this.inlineRenderer.patch(this, cursor, highlights);
   }
 
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     const { level } = this.parent!.meta;
 
@@ -50,7 +50,7 @@ class AtxHeadingContent extends Format {
     }
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     if (start.offset === 0 && end.offset === 0) {
       event.preventDefault();
diff --git a/lib/block/content/codeBlockContent/index.ts b/lib/block/content/codeBlockContent/index.ts
index 76d546f..431d779 100644
--- a/lib/block/content/codeBlockContent/index.ts
+++ b/lib/block/content/codeBlockContent/index.ts
@@ -86,9 +86,9 @@ function hasStateMeta(
 
 class CodeBlockContent extends Content {
   public initialLang: string;
-  public parent: Code | null = null;
+  public override parent: Code | null = null;
 
-  static blockName = 'codeblock.content';
+  static override blockName = 'codeblock.content';
 
   static create(muya: Muya, state: CodeContentState) {
     const content = new CodeBlockContent(muya, state);
@@ -132,7 +132,7 @@ class CodeBlockContent extends Content {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.outContainer;
   }
 
@@ -143,7 +143,7 @@ class CodeBlockContent extends Content {
     }
   }
 
-  update(_cursor: Cursor, highlights = []) {
+  override update(_cursor: Cursor, highlights = []) {
     const { lang, text } = this;
     // transform alias to original language
     const fullLengthLang = transformAliasToOrigin([lang])[0];
@@ -170,7 +170,7 @@ class CodeBlockContent extends Content {
     }
   }
 
-  inputHandler(event: Event): void {
+  override inputHandler(event: Event): void {
     if (this.isComposed) {
       return;
     }
@@ -198,7 +198,7 @@ class CodeBlockContent extends Content {
     }
   }
 
-  enterHandler(event: KeyboardEvent): void {
+  override enterHandler(event: KeyboardEvent): void {
     event.preventDefault();
 
     // Shift + Enter to jump out of code block.
@@ -247,7 +247,7 @@ class CodeBlockContent extends Content {
     this.setCursor(offset, offset, true);
   }
 
-  tabHandler(event: KeyboardEvent): void {
+  override tabHandler(event: KeyboardEvent): void {
     event.preventDefault();
     const { start, end } = this.getCursor()!;
     const { lang, text } = this;
@@ -324,7 +324,7 @@ class CodeBlockContent extends Content {
     }
   }
 
-  backspaceHandler(event: KeyboardEvent): void {
+  override backspaceHandler(event: KeyboardEvent): void {
     const { start, end } = this.getCursor()!;
     // If the cursor is in the first position of the code block text, 
     // when backspace is pressed, this time the code block should be converted to a normal paragraph
@@ -392,7 +392,7 @@ class CodeBlockContent extends Content {
     }
   }
 
-  keyupHandler(): void {
+  override keyupHandler(): void {
     if (this.isComposed) {
       return;
     }
diff --git a/lib/block/content/langInputContent/index.ts b/lib/block/content/langInputContent/index.ts
index 99beb2a..00c9992 100644
--- a/lib/block/content/langInputContent/index.ts
+++ b/lib/block/content/langInputContent/index.ts
@@ -6,9 +6,9 @@ import { ICodeBlockState } from '@muya/state/types';
 import { getHighlightHtml } from '@muya/utils/highlightHTML';
 
 class LangInputContent extends Content {
-  public parent: CodeBlock | null = null;
+  public override parent: CodeBlock | null = null;
 
-  static blockName = 'language-input';
+  static override blockName = 'language-input';
 
   static create(muya: Muya, state: ICodeBlockState) {
     const content = new LangInputContent(muya, state);
@@ -23,11 +23,11 @@ class LangInputContent extends Content {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.parent;
   }
 
-  update(_cursor?: Cursor, highlights = []) {
+  override update(_cursor?: Cursor, highlights = []) {
     this.domNode!.innerHTML = getHighlightHtml(this.text, highlights);
   }
 
@@ -45,13 +45,13 @@ class LangInputContent extends Content {
     this.muya.eventCenter.emit('content-change', { block: this });
   }
 
-  inputHandler() {
+  override inputHandler() {
     const textContent = this.domNode!.textContent ?? '';
     const lang = textContent.split(/\s+/)[0];
     this.updateLanguage(lang);
   }
 
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     event.preventDefault();
     event.stopPropagation();
 
@@ -59,7 +59,7 @@ class LangInputContent extends Content {
     parent!.lastContentInDescendant()?.setCursor(0, 0);
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     const { text } = this;
     // The next if statement is used to fix Firefox compatibility issues
diff --git a/lib/block/content/paragraphContent/index.ts b/lib/block/content/paragraphContent/index.ts
index 90cf9a4..4a707d0 100644
--- a/lib/block/content/paragraphContent/index.ts
+++ b/lib/block/content/paragraphContent/index.ts
@@ -63,9 +63,9 @@ const parseTableHeader = (text: string) => {
  * ParagraphContent
  */
 class ParagraphContent extends Format {
-  public parent: Nullable<Paragraph> = null;
+  public override parent: Nullable<Paragraph> = null;
 
-  static blockName = 'paragraph.content';
+  static override blockName = 'paragraph.content';
 
   static create(muya: Muya, text: string) {
     const content = new ParagraphContent(muya, text);
@@ -81,11 +81,11 @@ class ParagraphContent extends Format {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.parent;
   }
 
-  update(cursor?: Cursor, highlights = []) {
+  override update(cursor?: Cursor, highlights = []) {
     this.inlineRenderer.patch(this, cursor, highlights);
     const { label } = this.inlineRenderer.getLabelInfo(this);
 
@@ -94,7 +94,7 @@ class ParagraphContent extends Format {
     }
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     const { eventCenter } = this.muya;
 
@@ -125,7 +125,7 @@ class ParagraphContent extends Format {
     }
   }
 
-  inputHandler(event: Event) {
+  override inputHandler(event: Event) {
     super.inputHandler(event);
     const { eventCenter } = this.muya;
 
@@ -388,7 +388,7 @@ class ParagraphContent extends Format {
     }
   }
 
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     if (!isKeyboardEvent(event)) {
       return;
     }
@@ -679,7 +679,7 @@ class ParagraphContent extends Format {
     cursorBlock.setCursor(start.offset, end.offset, true);
   }
 
-  insertTab() {
+  override insertTab() {
     const { muya, text } = this;
     const { tabSize } = muya.options;
     const tabCharacter = String.fromCharCode(160).repeat(tabSize);
@@ -823,7 +823,7 @@ class ParagraphContent extends Format {
     return result;
   }
 
-  tabHandler(event: Event) {
+  override tabHandler(event: Event) {
     // disable tab focus
     event.preventDefault();
 
diff --git a/lib/block/content/setextHeadingContent/index.ts b/lib/block/content/setextHeadingContent/index.ts
index 6ebc0c2..381891b 100644
--- a/lib/block/content/setextHeadingContent/index.ts
+++ b/lib/block/content/setextHeadingContent/index.ts
@@ -5,7 +5,7 @@ import { Cursor } from '@muya/selection/types';
 import { isKeyboardEvent } from '@muya/utils';
 
 class SetextHeadingContent extends Format {
-  static blockName = 'setextheading.content';
+  static override blockName = 'setextheading.content';
 
   static create(muya: Muya, text: string) {
     const content = new SetextHeadingContent(muya, text);
@@ -19,15 +19,15 @@ class SetextHeadingContent extends Format {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.parent;
   }
 
-  update(cursor: Cursor, highlights = []) {
+  override update(cursor: Cursor, highlights = []) {
     return this.inlineRenderer.patch(this, cursor, highlights);
   }
 
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     if(!isKeyboardEvent(event)) {
       return;
     }
@@ -68,7 +68,7 @@ class SetextHeadingContent extends Format {
     }
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     if (start.offset === 0 && end.offset === 0) {
       this.convertToParagraph(true);
diff --git a/lib/block/content/tableCell/index.ts b/lib/block/content/tableCell/index.ts
index 9282913..47e8005 100644
--- a/lib/block/content/tableCell/index.ts
+++ b/lib/block/content/tableCell/index.ts
@@ -12,7 +12,7 @@ import { isKeyboardEvent } from '@muya/utils';
 class TableCellContent extends Format {
   public hasZeroWidthSpaceAtBeginning: boolean = false;
 
-  static blockName = 'table.cell.content';
+  static override blockName = 'table.cell.content';
 
   static create(muya: Muya, text: string) {
     const content = new TableCellContent(muya, text);
@@ -42,11 +42,11 @@ class TableCellContent extends Format {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.table;
   }
 
-  update(cursor: Cursor, highlights = []) {
+  override update(cursor: Cursor, highlights = []) {
     return this.inlineRenderer.patch(this, cursor, highlights);
   }
 
@@ -118,7 +118,7 @@ class TableCellContent extends Format {
     cursorBlock.setCursor(0, 0, true);
   }
 
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     if (!isKeyboardEvent(event)) {
       return;
     }
@@ -131,7 +131,7 @@ class TableCellContent extends Format {
     }
   }
 
-  arrowHandler(event: Event) {
+  override arrowHandler(event: Event) {
     if (!isKeyboardEvent(event)) {
       return;
     }
@@ -195,7 +195,7 @@ class TableCellContent extends Format {
     }
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     const previousContentBlock = this.previousContentInContext();
 
@@ -209,7 +209,7 @@ class TableCellContent extends Format {
     if (
       !previousContentBlock ||
       (previousContentBlock.blockName !== 'table.cell.content' &&
-        this.table.isEmpty)
+        this.table.isEmpty())
     ) {
       const state = {
         name: 'paragraph',
@@ -227,7 +227,7 @@ class TableCellContent extends Format {
     }
   }
 
-  tabHandler(event: Event) {
+  override tabHandler(event: Event) {
     event.preventDefault();
     event.stopPropagation();
 
@@ -243,7 +243,7 @@ class TableCellContent extends Format {
   // the table to be messed up, so we insert a zero-width
   // character before entering the Chinese, and remove the 
   // zero-width character after entering the Chinese.
-  composeHandler(event: Event) {
+  override composeHandler(event: Event) {
     super.composeHandler(event);
     if (event.type === 'compositionstart' && this.text === '') {
       this.hasZeroWidthSpaceAtBeginning = true;
diff --git a/lib/block/content/thematicBreakContent/index.ts b/lib/block/content/thematicBreakContent/index.ts
index 38c8de3..e834975 100644
--- a/lib/block/content/thematicBreakContent/index.ts
+++ b/lib/block/content/thematicBreakContent/index.ts
@@ -4,7 +4,7 @@ import Muya from '@muya/index';
 import { Cursor } from '@muya/selection/types';
 
 class ThematicBreakContent extends Format {
-  static blockName = 'thematicbreak.content';
+  static override blockName = 'thematicbreak.content';
 
   static create(muya: Muya, text: string) {
     const content = new ThematicBreakContent(muya, text);
@@ -18,11 +18,11 @@ class ThematicBreakContent extends Format {
     this.createDomNode();
   }
 
-  getAnchor() {
+  override getAnchor() {
     return this.parent;
   }
 
-  update(cursor: Cursor, highlights = []) {
+  override update(cursor: Cursor, highlights = []) {
     return this.inlineRenderer.patch(this, cursor, highlights);
   }
 
@@ -30,7 +30,7 @@ class ThematicBreakContent extends Format {
    * Create an empty paragraph bellow.
    * @param {*} event
    */
-  enterHandler(event: Event) {
+  override enterHandler(event: Event) {
     const { text, muya } = this;
     const { start, end } = this.getCursor()!;
     if (start.offset === end.offset && start.offset === 0) {
@@ -51,7 +51,7 @@ class ThematicBreakContent extends Format {
     }
   }
 
-  backspaceHandler(event: Event) {
+  override backspaceHandler(event: Event) {
     const { start, end } = this.getCursor()!;
     if (start.offset === 0 && end.offset === 0) {
       // Remove the text content and convert it to paragraph
diff --git a/lib/block/extra/diagram/diagramContainer.ts b/lib/block/extra/diagram/diagramContainer.ts
index 48c861b..a995c0f 100644
--- a/lib/block/extra/diagram/diagramContainer.ts
+++ b/lib/block/extra/diagram/diagramContainer.ts
@@ -8,7 +8,7 @@ const debug = logger('diagramContainer:');
 
 class DiagramContainer extends Parent {
   public meta: IDiagramMeta;
-  static blockName = 'diagram-container';
+  static override blockName = 'diagram-container';
 
   static create(muya: Muya, state: IDiagramState) {
     const diagramContainer = new DiagramContainer(muya, state);
@@ -24,7 +24,7 @@ class DiagramContainer extends Parent {
     return this.meta.lang;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
 
     return [...pPath];
@@ -38,7 +38,7 @@ class DiagramContainer extends Parent {
     this.createDomNode();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in diagramContainer');
     return {} as TState;
   }
diff --git a/lib/block/extra/diagram/diagramPreview.ts b/lib/block/extra/diagram/diagramPreview.ts
index b2c243a..bf76c5a 100644
--- a/lib/block/extra/diagram/diagramPreview.ts
+++ b/lib/block/extra/diagram/diagramPreview.ts
@@ -58,7 +58,7 @@ const renderDiagram = async ({
 class DiagramPreview extends Parent {
   public code: string;
   public type: string;
-  static blockName = 'diagram-preview';
+  static override blockName = 'diagram-preview';
 
   static create(muya: Muya, state: IDiagramState) {
     const diagramPreview = new DiagramPreview(muya, state);
@@ -66,7 +66,7 @@ class DiagramPreview extends Parent {
     return diagramPreview;
   }
 
-  get path() {
+  override get path() {
     debug.warn('You can never call `get path` in diagramPreview');
     return [];
   }
@@ -86,7 +86,7 @@ class DiagramPreview extends Parent {
     this.update();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in diagramPreview');
     return {} as TState;
   }
diff --git a/lib/block/extra/diagram/index.ts b/lib/block/extra/diagram/index.ts
index 16df097..3a2637b 100644
--- a/lib/block/extra/diagram/index.ts
+++ b/lib/block/extra/diagram/index.ts
@@ -10,7 +10,7 @@ const debug = logger('diagram:');
 
 class DiagramBlock extends Parent {
   public meta: IDiagramMeta;
-  static blockName = 'diagram';
+  static override blockName = 'diagram';
 
   static create(muya: Muya, state: IDiagramState) {
     const diagramBlock = new DiagramBlock(muya, state);
@@ -48,7 +48,7 @@ class DiagramBlock extends Parent {
     return diagramBlock;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -69,7 +69,7 @@ class DiagramBlock extends Parent {
       : this;
   }
 
-  getState(): IDiagramState {
+  override getState(): IDiagramState {
     const { meta } = this;
     const text = this.firstContentInDescendant()?.text;
 
diff --git a/lib/block/extra/frontmatter/index.ts b/lib/block/extra/frontmatter/index.ts
index ebfe928..95e058e 100644
--- a/lib/block/extra/frontmatter/index.ts
+++ b/lib/block/extra/frontmatter/index.ts
@@ -14,7 +14,7 @@ const debug = logger('frontmatter:');
 class Frontmatter extends Parent {
   public meta: IFrontmatterMeta;
 
-  static blockName = 'frontmatter';
+  static override blockName = 'frontmatter';
 
   static create(muya: Muya, state: IFrontmatterState) {
     const frontmatter = new Frontmatter(muya, state);
@@ -56,7 +56,7 @@ class Frontmatter extends Parent {
         });
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -86,7 +86,7 @@ class Frontmatter extends Parent {
     }
   }
 
-  getState(): IFrontmatterState {
+  override getState(): IFrontmatterState {
     const state: IFrontmatterState = {
       name: 'frontmatter',
       meta: { ...this.meta },
diff --git a/lib/block/extra/math/index.ts b/lib/block/extra/math/index.ts
index cd30b52..9981259 100644
--- a/lib/block/extra/math/index.ts
+++ b/lib/block/extra/math/index.ts
@@ -7,7 +7,7 @@ import { IMathBlockState, IMathMeta } from '../../../state/types';
 class MathBlock extends Parent {
   public meta: IMathMeta;
 
-  static blockName = 'math-block';
+  static override blockName = 'math-block';
 
   static create(muya: Muya, state: IMathBlockState) {
     const mathBlock = new MathBlock(muya, state);
@@ -27,7 +27,7 @@ class MathBlock extends Parent {
     return mathBlock;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -48,7 +48,7 @@ class MathBlock extends Parent {
       : this;
   }
 
-  getState(): IMathBlockState {
+  override getState(): IMathBlockState {
     const { meta } = this;
     const text = this.firstContentInDescendant()?.text;
 
diff --git a/lib/block/extra/math/mathContainer.ts b/lib/block/extra/math/mathContainer.ts
index 1f3bb7f..e6dbc15 100644
--- a/lib/block/extra/math/mathContainer.ts
+++ b/lib/block/extra/math/mathContainer.ts
@@ -7,7 +7,7 @@ import { IMathBlockState, TState } from '../../../state/types';
 const debug = logger('mathContainer:');
 
 class MathContainer extends Parent {
-  static blockName = 'math-container';
+  static override blockName = 'math-container';
 
   static create(muya: Muya, state: IMathBlockState) {
     const mathContainer = new MathContainer(muya);
@@ -23,7 +23,7 @@ class MathContainer extends Parent {
     return 'latex';
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
 
     return [...pPath];
@@ -36,7 +36,7 @@ class MathContainer extends Parent {
     this.createDomNode();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in mathContainer');
     return {} as TState;
   }
diff --git a/lib/block/extra/math/mathPreview.ts b/lib/block/extra/math/mathPreview.ts
index d4c8c43..8508d9e 100644
--- a/lib/block/extra/math/mathPreview.ts
+++ b/lib/block/extra/math/mathPreview.ts
@@ -10,7 +10,7 @@ const debug = logger('mathPreview:');
 class MathPreview extends Parent {
   public math: string;
 
-  static blockName = 'math-preview';
+  static override blockName = 'math-preview';
 
   static create(muya: Muya, state: IMathBlockState) {
     const mathBlock = new MathPreview(muya, state);
@@ -18,7 +18,7 @@ class MathPreview extends Parent {
     return mathBlock;
   }
 
-  get path() {
+  override get path() {
     debug.warn('You can never call `get path` in htmlPreview');
     return [];
   }
@@ -37,7 +37,7 @@ class MathPreview extends Parent {
     this.update();
   }
 
-  getState(): TState {
+  override getState(): TState {
     debug.warn('You can never call `getState` in mathPreview');
     return {} as TState;
   }
diff --git a/lib/block/gfm/table/cell.ts b/lib/block/gfm/table/cell.ts
index 1baddb2..43addb3 100644
--- a/lib/block/gfm/table/cell.ts
+++ b/lib/block/gfm/table/cell.ts
@@ -1,3 +1,4 @@
+import LinkedList from '@muya/block/base/linkedList/linkedList';
 import Parent from '@muya/block/base/parent';
 import TableCellContent from '@muya/block/content/tableCell';
 import LeafQueryBlock from '@muya/block/mixins/leafQueryBlock';
@@ -11,9 +12,11 @@ import TableInner from './table';
 
 @mixins(LeafQueryBlock)
 class TableBodyCell extends Parent {
+  override children: LinkedList<TableCellContent> = new LinkedList();
+
   public meta: ITableCellMeta;
 
-  static blockName = 'table.cell';
+  static override blockName = 'table.cell';
 
   static create(muya: Muya, state: ITableCellState) {
     const cell = new TableBodyCell(muya, state);
@@ -25,7 +28,7 @@ class TableBodyCell extends Parent {
     return cell;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -68,7 +71,7 @@ class TableBodyCell extends Parent {
     this.createDomNode();
   }
 
-  getState(): ITableCellState {
+  override getState(): ITableCellState {
     const state: ITableCellState = {
       name: 'table.cell',
       meta: { ...this.meta },
diff --git a/lib/block/gfm/table/index.ts b/lib/block/gfm/table/index.ts
index 8ef4934..382655f 100644
--- a/lib/block/gfm/table/index.ts
+++ b/lib/block/gfm/table/index.ts
@@ -1,18 +1,24 @@
+import LinkedList from '@muya/block/base/linkedList/linkedList';
 import Parent from '@muya/block/base/parent';
+import TableCellContent from '@muya/block/content/tableCell';
 import ScrollPage from '@muya/block/scrollPage';
 import { TBlockPath } from '@muya/block/types';
 import Muya from '@muya/index';
+import { Nullable } from '@muya/types';
 import { diffToTextOp } from '@muya/utils';
 import logger from '@muya/utils/logger';
 import diff from 'fast-diff';
 import { ITableState } from '../../../state/types';
+import TableBodyCell from './cell';
 import TableRow from './row';
 import TableInner from './table';
 
 const debug = logger('table:');
 
 class Table extends Parent {
-  static blockName = 'table';
+  override children: LinkedList<TableInner> = new LinkedList();
+
+  static override blockName = 'table';
 
   static create(muya: Muya, state: ITableState) {
     const table = new Table(muya);
@@ -52,21 +58,13 @@ class Table extends Parent {
     return this.create(muya, state);
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
     return [...pPath, offset];
   }
 
-  get isEmpty() {
-    const state = this.getState();
-
-    return state.children.every((row) =>
-      row.children.every((cell) => cell.text === '')
-    );
-  }
-
   get rowCount() {
     return (this.firstChild as TableInner).length();
   }
@@ -84,6 +82,14 @@ class Table extends Parent {
     this.listenDomEvent();
   }
 
+  isEmpty() {
+    const state = this.getState();
+
+    return state.children.every((row) =>
+      row.children.every((cell) => cell.text === '')
+    );
+  }
+
   listenDomEvent() {
     const { eventCenter } = this.muya;
     const { domNode } = this;
@@ -101,30 +107,35 @@ class Table extends Parent {
   }
 
   queryBlock(path: TBlockPath) {
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
     return (this.firstChild as TableInner).queryBlock(path);
   }
 
-  empty() {
-    const { isEmpty } = this;
-    if (isEmpty) {
+  override empty() {
+    if (this.isEmpty()) {
+      return;
+    }
+
+    const table = this.children.head;
+    if (table == null) {
       return;
     }
 
-    const table = this.firstChild as TableInner;
     table.forEach((row) => {
-      row.forEach((cell) => {
-        cell.firstChild.text = '';
+      (row as TableRow).forEach((cell) => {
+        ((cell as TableBodyCell).firstChild as TableCellContent).text = '';
       });
     });
   }
 
-  insertRow(offset) {
+  insertRow(offset: number) {
     const { columnCount } = this;
     const firstRowState = this.getState().children[0];
     const currentRow =
       offset > 0
-        ? (this.firstChild as any).find(offset - 1)
-        : (this.firstChild as any).find(offset);
+        ? (this.firstChild as TableInner).find(offset - 1)
+        : (this.firstChild as TableInner).find(offset);
     const state = {
       name: 'table.row',
       children: [...new Array(columnCount)].map((_, i) => {
@@ -141,17 +152,18 @@ class Table extends Parent {
     const rowBlock = ScrollPage.loadBlock('table.row').create(this.muya, state);
 
     if (offset > 0) {
-      (this.firstChild as any).insertAfter(rowBlock, currentRow);
+      (this.firstChild as TableInner).insertAfter(rowBlock, currentRow as TableRow);
     } else {
-      (this.firstChild as any).insertBefore(rowBlock, currentRow);
+      (this.firstChild as TableInner).insertBefore(rowBlock, currentRow as TableRow);
     }
 
     return rowBlock.firstContentInDescendant();
   }
 
-  insertColumn(offset, align = 'none') {
-    const tableInner: any = this.firstChild;
-    let firstCellInNewColumn = null;
+  insertColumn(offset: number, align = 'none') {
+    const tableInner = this.firstChild as TableInner;
+    let firstCellInNewColumn: Nullable<TableBodyCell> = null;
+
     tableInner.forEach((row) => {
       const state = {
         name: 'table.cell',
@@ -159,48 +171,56 @@ class Table extends Parent {
         text: '',
       };
       const cell = ScrollPage.loadBlock('table.cell').create(this.muya, state);
-      const ref = row.find(offset);
-      row.insertBefore(cell, ref);
+      const ref = (row as TableRow).find(offset);
+
+      (row as TableRow).insertBefore(cell, ref as TableBodyCell);
       if (!firstCellInNewColumn) {
         firstCellInNewColumn = cell;
       }
     });
 
-    return firstCellInNewColumn.firstChild;
+    return firstCellInNewColumn!.firstChild as TableCellContent;
   }
 
-  removeRow(offset) {
-    const row = (this.firstChild as any).find(offset);
+  removeRow(offset: number) {
+    const row = (this.firstChild as TableInner).find(offset);
+    if (row == null) {
+      return;
+    }
+
     row.remove();
   }
 
-  removeColumn(offset) {
+  removeColumn(offset: number) {
     const { columnCount } = this;
     if (offset < 0 || offset >= columnCount) {
       debug.warn(`column at ${offset} is not existed.`);
+      return;
     }
 
-    const table: any = this.firstChild;
+    const table = this.firstChild as TableInner;
     if (this.columnCount === 1) {
       return this.remove();
     }
 
     table.forEach((row) => {
-      const cell = row.find(offset);
+      const cell = (row as TableRow).find(offset);
       if (cell) {
         cell.remove();
       }
     });
   }
 
-  alignColumn(offset, value) {
+  alignColumn(offset: number, value: string) {
     const { columnCount } = this;
     if (offset < 0 || offset >= columnCount) {
       debug.warn(`Column at ${offset} is not existed.`);
+      return;
     }
-    const table: any = this.firstChild;
+
+    const table = this.firstChild as TableInner;
     table.forEach((row) => {
-      const cell = row.find(offset);
+      const cell = (row as TableRow).find(offset) as TableBodyCell;
       if (cell) {
         const { align: oldValue } = cell;
         cell.align = oldValue === value ? 'none' : value;
@@ -214,8 +234,8 @@ class Table extends Parent {
     });
   }
 
-  getState(): ITableState {
-    return (this.firstChild as any).getState();
+  override getState(): ITableState {
+    return (this.firstChild as TableInner).getState();
   }
 }
 
diff --git a/lib/block/gfm/table/row.ts b/lib/block/gfm/table/row.ts
index 4367aea..d7575e2 100644
--- a/lib/block/gfm/table/row.ts
+++ b/lib/block/gfm/table/row.ts
@@ -1,3 +1,4 @@
+import LinkedList from '@muya/block/base/linkedList/linkedList';
 import Parent from '@muya/block/base/parent';
 import ContainerQueryBlock from '@muya/block/mixins/containerQueryBlock';
 import ScrollPage from '@muya/block/scrollPage';
@@ -8,7 +9,9 @@ import TableBodyCell from './cell';
 
 @mixins(ContainerQueryBlock)
 class TableRow extends Parent {
-  static blockName = 'table.row';
+  override children: LinkedList<TableBodyCell> = new LinkedList();
+
+  static override blockName = 'table.row';
 
   static create(muya: Muya, state: ITableRowState) {
     const row = new TableRow(muya);
@@ -22,7 +25,7 @@ class TableRow extends Parent {
     return row;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -37,7 +40,7 @@ class TableRow extends Parent {
     this.createDomNode();
   }
 
-  getState(): ITableRowState {
+  override getState(): ITableRowState {
     const state: ITableRowState = {
       name: 'table.row',
       children: this.map((node) => (node as TableBodyCell).getState()),
diff --git a/lib/block/gfm/table/table.ts b/lib/block/gfm/table/table.ts
index 4c293d6..6098d85 100644
--- a/lib/block/gfm/table/table.ts
+++ b/lib/block/gfm/table/table.ts
@@ -1,3 +1,4 @@
+import LinkedList from '@muya/block/base/linkedList/linkedList';
 import Parent from '@muya/block/base/parent';
 import ContainerQueryBlock from '@muya/block/mixins/containerQueryBlock';
 import ScrollPage from '@muya/block/scrollPage';
@@ -8,7 +9,9 @@ import TableRow from './row';
 
 @mixins(ContainerQueryBlock)
 class TableInner extends Parent {
-  static blockName = 'table.inner';
+  override children: LinkedList<TableRow> = new LinkedList();
+
+  static override blockName = 'table.inner';
 
   static create(muya: Muya, state: ITableState) {
     const table = new TableInner(muya, state);
@@ -22,7 +25,7 @@ class TableInner extends Parent {
     return table;
   }
 
-  get path() {
+  override get path() {
     return [...this.parent!.path, 'children'];
   }
 
@@ -35,7 +38,7 @@ class TableInner extends Parent {
     this.createDomNode();
   }
 
-  getState(): ITableState {
+  override getState(): ITableState {
     const state: ITableState = {
       name: 'table',
       children: this.map((node) => (node as TableRow).getState()),
diff --git a/lib/block/gfm/taskList/index.ts b/lib/block/gfm/taskList/index.ts
index f808928..9dc7a37 100644
--- a/lib/block/gfm/taskList/index.ts
+++ b/lib/block/gfm/taskList/index.ts
@@ -10,7 +10,7 @@ import TaskListItem from '../taskListItem';
 class TaskList extends Parent {
   public meta: ITaskListMeta;
 
-  static blockName = 'task-list';
+  static override blockName = 'task-list';
 
   static create(muya: Muya, state: ITaskListState) {
     const taskList = new TaskList(muya, state);
@@ -24,7 +24,7 @@ class TaskList extends Parent {
     return taskList;
   }
 
-  get path() {
+  override get path() {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -54,26 +54,26 @@ class TaskList extends Parent {
       return;
     }
 
-    let first = this.firstChild;
-    let last = this.lastChild;
+    let first = this.firstChild as TaskListItem;
+    let last = this.lastChild as TaskListItem;
     let anchor = first;
 
     while (first !== last) {
       if (!first.checked) {
-        first = first.next;
+        first = first.next as TaskListItem;
         anchor = first;
       } else if (last.checked) {
-        last = last.prev;
+        last = last.prev as TaskListItem;
       } else {
         const temp = last;
-        last = last.prev;
+        last = last.prev as TaskListItem;
         temp.insertInto(this, anchor);
         anchor = temp;
       }
     }
   }
 
-  getState(): ITaskListState {
+  override getState(): ITaskListState {
     const state: ITaskListState = {
       name: 'task-list',
       meta: { ...this.meta },
diff --git a/lib/block/gfm/taskListCheckbox/index.ts b/lib/block/gfm/taskListCheckbox/index.ts
index 1a3bef9..0d7f2c9 100644
--- a/lib/block/gfm/taskListCheckbox/index.ts
+++ b/lib/block/gfm/taskListCheckbox/index.ts
@@ -20,7 +20,7 @@ class TaskListCheckbox extends TreeNode {
 
   private eventIds: string[] = [];
 
-  static blockName = 'task-list-checkbox';
+  static override blockName = 'task-list-checkbox';
 
   static create(muya: Muya, meta: ITaskListItemMeta) {
     const checkbox = new TaskListCheckbox(muya, meta);
@@ -116,7 +116,7 @@ class TaskListCheckbox extends TreeNode {
   }
 
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  remove(_source: string) {
+  override remove(_source: string) {
     super.remove();
     this.detachDOMEvents();
 
diff --git a/lib/block/gfm/taskListItem/index.ts b/lib/block/gfm/taskListItem/index.ts
index 38b8213..46ab63f 100644
--- a/lib/block/gfm/taskListItem/index.ts
+++ b/lib/block/gfm/taskListItem/index.ts
@@ -9,11 +9,11 @@ import { ITaskListItemMeta, ITaskListItemState } from '../../../state/types';
 
 @mixins(ContainerQueryBlock)
 class TaskListItem extends Parent {
-  public children: LinkedList<Parent> = new LinkedList();
+  override children: LinkedList<Parent> = new LinkedList();
 
-  public meta: ITaskListItemMeta;
+  meta: ITaskListItemMeta;
 
-  static blockName = 'task-list-item';
+  static override blockName = 'task-list-item';
 
   static create(muya: Muya, state: ITaskListItemState) {
     const listItem = new TaskListItem(muya, state);
@@ -31,7 +31,7 @@ class TaskListItem extends Parent {
     return listItem;
   }
 
-  get path(): TBlockPath {
+  override get path(): TBlockPath {
     const { path: pPath } = this.parent!;
     const offset = this.parent!.offset(this);
 
@@ -63,7 +63,7 @@ class TaskListItem extends Parent {
     this.createDomNode();
   }
 
-  getState(): ITaskListItemState {
+  override getState(): ITaskListItemState {
     const state: ITaskListItemState = {
       name: 'task-list-item',
       meta: { ...this.meta },
diff --git a/lib/block/mixins/containerQueryBlock.ts b/lib/block/mixins/containerQueryBlock.ts
index 19a0461..69b3334 100644
--- a/lib/block/mixins/containerQueryBlock.ts
+++ b/lib/block/mixins/containerQueryBlock.ts
@@ -19,6 +19,7 @@ class ContainerQueryBlock {
     const p = path.shift() as number;
     const block = this.find(p);
 
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
     return block && path.length ? (block as any).queryBlock(path) : block;
   }
 }
diff --git a/lib/block/scrollPage/index.ts b/lib/block/scrollPage/index.ts
index d4b508e..0b2c9ab 100644
--- a/lib/block/scrollPage/index.ts
+++ b/lib/block/scrollPage/index.ts
@@ -18,7 +18,7 @@ interface IBlurFocus {
 class ScrollPage extends Parent {
   private _blurFocus: IBlurFocus = { blur: null, focus: null };
 
-  static blockName = 'scrollpage';
+  static override blockName = 'scrollpage';
 
   static registeredBlocks = new Map();
 
@@ -51,7 +51,7 @@ class ScrollPage extends Parent {
     return scrollPage;
   }
 
-  get path() {
+  override get path() {
     return [];
   }
 
@@ -66,7 +66,7 @@ class ScrollPage extends Parent {
     this.listenDomEvent();
   }
 
-  getState() {
+  override getState() {
     debug.warn('You can never call `getState` in scrollPage');
 
     return {} as TState;
@@ -101,7 +101,8 @@ class ScrollPage extends Parent {
 
     const p = path.shift() as number;
     const block = this.find(p) as Parent;
-
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
     return block && path.length ? block.queryBlock(path) : block;
   }
 
diff --git a/lib/state/types.ts b/lib/state/types.ts
index 34a9437..51d8a56 100644
--- a/lib/state/types.ts
+++ b/lib/state/types.ts
@@ -79,7 +79,7 @@ export interface ITableRowState {
 }
 
 export interface ITableCellMeta {
-  align: 'none' | 'left' | 'center' | 'right';
+  align: string; // 'none' | 'left' | 'center' | 'right';
 }
 
 export interface ITableCellState {
diff --git a/lib/ui/paragraphFrontMenu/config.ts b/lib/ui/paragraphFrontMenu/config.ts
index 331fab7..018b940 100644
--- a/lib/ui/paragraphFrontMenu/config.ts
+++ b/lib/ui/paragraphFrontMenu/config.ts
@@ -43,8 +43,8 @@ export const canTurnIntoMenu = (block: Parent) => {
 
   switch (blockName) {
     case 'paragraph': {
-      const isEmpty = /^\s*$/.test(block.firstContentInDescendant().text);
-      if (isEmpty) {
+      const paragraphIsEmpty = /^\s*$/.test(block.firstContentInDescendant()!.text);
+      if (paragraphIsEmpty) {
         return ALL_MENU_CONFIG.filter((item) => item.label !== 'frontmatter');
       }
 
diff --git a/tsconfig.json b/tsconfig.json
index cb66161..416f545 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -14,13 +14,14 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-
+  
     /* Linting */
     "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true,
     "noErrorTruncation": true,
+    "noImplicitOverride": true,
     "paths": {
       "@muya/*": ["./lib/*"],
     }