add config

Not reactive now.

README.md

@@ -1,9 +1,15 @@
 # Modern Spreadsheet
 
+<img src="https://raw.githubusercontent.com/yazmeyaa/modern_spreadsheet/6dc20f92e769210c076600c7fcfacd4ed528f085/repo_assets/spreadsheet_preview.png?raw=true" alt="spreadsheet_preview">
+
+## Features:
 - High performance spreadsheet based on CanvasAPI.
 - TypeScript supported
+- Native scrolling
+- Customizable
+- Copy & Paste support
 
-## Basic usage
+### Basic usage
 
 ```ts
 import Spreadsheet from "modern_spreadsheet";
@@ -14,7 +20,7 @@ const sheet = new Spreadsheet(target);
 //...
 ```
 
-## Save and load data
+### Save and load data
 
 ```ts
 function saveData() {
@@ -30,10 +36,11 @@ function loadData() {
 }
 ```
 
-## Supported events
+#### Supported events
 - onCellClick
 - onSelectionChange
 - onCellChange
+- onCopy
 
 ### Using events examples
 ```ts
@@ -41,23 +48,27 @@ import Spreadsheet, { SpreadsheetConstructorProperties } from "./main";
 
 const options: SpreadsheetConstructorProperties = {
   onCellClick: (event, cell) => {
-    console.log('Cell click', event, cell)
+    console.log("Cell click", event, cell);
   },
   onSelectionChange: (selection) => {
-    console.log("Changed selection: ", selection)
+    console.log("Changed selection: ", selection);
   },
-  onCellChange(cell) {
-    console.log("Cell changed: ", cell)
+  onCellChange = (cell) => {
+    console.log("Cell changed: ", cell);
   },
-}
+  onCopy: (range, data, dataAsString) => {
+    console.log("Copy event: ", range, data, dataAsString)
+  }
+};
 
 const sheet = new Spreadsheet("#spreadsheet", options);
 ```
 
-## Roadmap
+### Roadmap
 
 - ~~Rows number and columns heading render~~
 - ~~Custom event functions (ex.: onSelectionChange, onCellEdit...). Full list of supported events will available on this page~~
+- ~~Copy & Paste support~~
 - Rows and columns resizing
 - Toolbar
 - Context menu
@@ -65,4 +76,3 @@ const sheet = new Spreadsheet("#spreadsheet", options);
 - Selected cell depends cells highlight
 - Async formulas support
 - Mutlisheets (?)
-- Copy & Paste support

dist/components/scroller.d.ts

@@ -12,6 +12,7 @@ export declare class Scroller {
     private root;
     private isSelecting;
     constructor(root: Spreadsheet);
+    setSelectingMode(mode: boolean): void;
     private handleMouseMove;
     private handleMouseUp;
     private handleDoubleClick;

dist/components/sheet.d.ts

@@ -10,5 +10,8 @@ export declare class Sheet {
     constructor(root: Spreadsheet);
     getCellByCoords(x: number, y: number): Position;
     renderCell(position: Position): void;
+    private getSelectionRange;
+    private renderSelectionRange;
+    renderSelection(): void;
     renderSheet(): void;
 }

dist/main.d.ts

@@ -1,13 +1,18 @@
 import { Cell, CellConstructorProps, CellStyles, Position, SerializableCell } from "./modules/cell";
-import { Config, ViewProperties } from "./modules/config";
+import { CellChangeEvent, CellClickEvent, Config, CopyEvent, SelectionChangeEvent, ViewProperties } from "./modules/config";
 import { RangeSelectionType, Selection } from "./modules/selection";
 import { Styles } from "./modules/styles";
 import { Viewport } from "./modules/viewport";
 import "./scss/main.scss";
 import { Cache } from "./modules/cache";
-interface SpreadsheetConstructorProperties {
-    config?: Omit<Config, "view">;
+import { Events } from "./modules/events";
+import { Clipboard } from "./modules/clipboard";
+export interface SpreadsheetConstructorProperties {
     view?: ViewProperties;
+    onCellClick?: CellClickEvent | null;
+    onSelectionChange?: SelectionChangeEvent | null;
+    onCellChange?: CellChangeEvent | null;
+    onCopy?: CopyEvent | null;
 }
 export declare const CSS_PREFIX = "modern_sc_";
 export default class Spreadsheet {
@@ -24,6 +29,8 @@ export default class Spreadsheet {
     viewport: Viewport;
     selection: Selection;
     cache: Cache;
+    events: Events;
+    clipboard: Clipboard;
     constructor(target: string | HTMLElement, props?: SpreadsheetConstructorProperties);
     private setRowsBarPosition;
     private setColumnsBarPosition;
@@ -49,12 +56,13 @@ export default class Spreadsheet {
     focusTable(): void;
     getCellByCoords(x: number, y: number): Position;
     getCell(position: Position): Cell;
-    changeCellValues(position: Position, values: Partial<Omit<CellConstructorProps, "position">>): void;
+    changeCellValues(position: Position, values: Partial<Omit<CellConstructorProps, "position">>, enableCallback?: boolean): void;
     changeCellStyles(position: Position, styles: CellStyles): void;
     applyActionToRange(range: RangeSelectionType, callback: (cell: Cell) => void): void;
     deleteSelectedCellsValues(): void;
     showEditor(position: Position, initialString?: string): void;
     renderSheet(): void;
+    renderSelection(): void;
     renderColumnsBar(): void;
     renderRowsBar(): void;
     renderCell(row: number, col: number): void;

dist/modules/cell.d.ts

@@ -49,7 +49,6 @@ export declare class Cell {
     getSerializableCell(): SerializableCell;
     changeStyles(styles: CellStyles): void;
     changeValues(values: Partial<Omit<CellConstructorProps, "position">>): void;
-    private isCellInRange;
     render(root: Spreadsheet): void;
 }
 export {};

dist/modules/clipboard.d.ts

@@ -0,0 +1,9 @@
+import Spreadsheet, { RangeSelectionType } from "../main";
+import { Cell, Position } from "./cell";
+export declare class Clipboard {
+    saved: Cell[][] | null;
+    root: Spreadsheet;
+    constructor(root: Spreadsheet);
+    copy(data: Cell[][], range: RangeSelectionType): void;
+    paste(root: Spreadsheet, { column, row }: Position, event: ClipboardEvent): void;
+}

dist/modules/config.d.ts

@@ -1,9 +1,15 @@
+import { Cell } from "./cell";
 import { Column } from "./column";
 import { Row } from "./row";
+import { RangeSelectionType, Selection } from "./selection";
 export interface ViewProperties {
     width: number;
     height: number;
 }
+export type CellClickEvent = (event: MouseEvent, cell: Cell) => void;
+export type SelectionChangeEvent = (selection: Selection) => void;
+export type CellChangeEvent = (cell: Cell) => void;
+export type CopyEvent = (range: RangeSelectionType, data: Cell[][], dataAsString: string) => void;
 export type ConfigProperties = {
     /** Please, end it with '_' symbol.
      *
@@ -14,6 +20,10 @@ export type ConfigProperties = {
     rows: Row[];
     columns: Column[];
     view: ViewProperties;
+    onCellClick?: CellClickEvent | null;
+    onSelectionChange?: SelectionChangeEvent | null;
+    onCellChange?: CellChangeEvent | null;
+    onCopy?: CopyEvent | null;
 };
 export type SheetConfigConstructorProps = {
     rows: Row[];
@@ -23,5 +33,9 @@ export declare class Config {
     rows: Row[];
     columns: Column[];
     view: ViewProperties;
+    onCellClick: CellClickEvent | null;
+    onSelectonChange: SelectionChangeEvent | null;
+    onCellChange: CellChangeEvent | null;
+    onCopy: CopyEvent | null;
     constructor(props: ConfigProperties);
 }

dist/modules/events.d.ts

@@ -0,0 +1,39 @@
+import { Scroller } from "../components/scroller";
+import Spreadsheet, { Cell, RangeSelectionType, Selection } from "../main";
+export declare enum EventTypes {
+    CELL_CLICK = "CELL_CLICK",
+    SELECTION_CHANGE = "CHANGE_SELECTION",
+    CELL_CHANGE = "CELL_CHANGE",
+    COPY_CELLS = "COPY_CELLS"
+}
+export type CellClickEvent = {
+    type: EventTypes.CELL_CLICK;
+    event: MouseEvent;
+    scroller: Scroller;
+};
+export type ChangeSelectionEvent = {
+    type: EventTypes.SELECTION_CHANGE;
+    selection: Selection;
+    enableCallback?: boolean;
+};
+export type ChangeCellEvent = {
+    type: EventTypes.CELL_CHANGE;
+    cell: Cell;
+    enableCallback?: boolean;
+};
+export type CopyAction = {
+    type: EventTypes.COPY_CELLS;
+    range: RangeSelectionType;
+    data: Cell[][];
+    dataAsString: string;
+};
+export type ActionTypes = CellClickEvent | ChangeSelectionEvent | ChangeCellEvent | CopyAction;
+export declare class Events {
+    root: Spreadsheet;
+    constructor(root: Spreadsheet);
+    dispatch(action: ActionTypes): void;
+    private cellClick;
+    private changeSelection;
+    private changeCellValues;
+    private copy;
+}

dist/style.css

@@ -1 +1 @@
-body{padding:0;margin:0}.modern_sc_content{position:absolute}.modern_sc_spreadsheet_container{position:relative;isolation:isolate;border:2px solid black}.modern_sc_sheet{display:block;contain:strict}.modern_sc_scroller{position:absolute;overflow:scroll;box-sizing:border-box;transform:translateZ(0)}.modern_sc_scroller:focus{outline:none}.modern_sc_editor{position:absolute;box-sizing:border-box;font-size:16px;font-family:Arial,Helvetica,sans-serif}.modern_sc_hide{visibility:hidden}
+body{padding:0;margin:0}.modern_sc_spreadsheet_container{position:relative;isolation:isolate;border:2px solid black}.modern_sc_content{position:absolute}.modern_sc_sheet{display:block;contain:strict}.modern_sc_scroller{position:absolute;overflow:scroll;box-sizing:border-box;transform:translateZ(0)}.modern_sc_scroller:focus{outline:none}.modern_sc_editor{position:absolute;box-sizing:border-box;font-size:16px;font-family:Arial,Helvetica,sans-serif}.modern_sc_hide{visibility:hidden}

dist/utils/position.d.ts

@@ -0,0 +1,3 @@
+import { BaseSelectionType, RangeSelectionType } from "../main";
+export declare function checkEqualRanges(range1: RangeSelectionType, range2: RangeSelectionType): boolean;
+export declare function checkEqualCellSelections(selection1: BaseSelectionType, selection2: BaseSelectionType): boolean;

package.json

@@ -1,7 +1,7 @@
 {
   "name": "modern_spreadsheet",
   "private": false,
-  "version": "0.0.29",
+  "version": "0.0.33",
   "exports": {
     ".": {
       "import": "./dist/main.js",
@@ -33,18 +33,21 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",
+    "build:HTML": "tsc && cross-env BUILD_BROWSER=true vite build",
     "build:watch": "tsc && vite build --watch",
     "preview": "vite preview",
     "predeploy": "npm run dist",
     "deploy": "gh-pages -d dist",
     "lint": "eslint src --ext .ts",
-    "lint:fix": "eslint src --ext .ts --fix"
+    "lint:fix": "eslint src --ext .ts --fix",
+    "format": "prettier --write ./src/**/*.ts"
   },
   "devDependencies": {
     "@rollup/plugin-typescript": "^11.1.2",
     "@types/node": "^20.4.4",
     "@typescript-eslint/eslint-plugin": "^6.2.0",
     "@typescript-eslint/parser": "^6.2.0",
+    "cross-env": "^7.0.3",
     "eslint": "^8.45.0",
     "eslint-config-prettier": "^8.8.0",
     "gh-pages": "^5.0.0",
@@ -53,6 +56,10 @@
     "sass": "^1.63.6",
     "tslib": "^2.6.0",
     "typescript": "^5.0.2",
-    "vite": "^4.4.0"
+    "vite": "^4.4.0",
+    "vite-plugin-html": "^3.2.0"
+  },
+  "dependencies": {
+    "fast-formula-parser": "^1.0.19"
   }
 }

src/components/columnsBar.ts

@@ -82,9 +82,7 @@ export class ColumnsBar {
 
     const isColSelected = this.isColumnSelected(column);
 
-    this.ctx.fillStyle = isColSelected
-      ? this.root.styles.cells.selectedBackground
-      : "white";
+    this.ctx.fillStyle = isColSelected ? "#c7ebff" : "white";
     this.ctx.strokeStyle = "black";
     this.ctx.lineWidth = 1;
 

src/components/editor.ts

@@ -55,16 +55,18 @@ export class Editor {
       case "Enter": {
         if (!this.root.selection.selectedCell) return;
 
+        this.root.changeCellValues(this.root.selection.selectedCell, {
+          value: this.element.value,
+          displayValue: this.element.value,
+        });
+
         this.root.events.dispatch({
           type: EventTypes.CELL_CHANGE,
           cell: this.root.getCell(this.root.selection.selectedCell),
-          values: {
-            value: this.element.value,
-            displayValue: this.element.value,
-          }
-        })
+        });
 
         this.hide();
+        this.root.renderSelection();
       }
     }
   };

src/components/rowsBar.ts

@@ -69,9 +69,7 @@ export class RowsBar {
 
     const isRowSeleted = this.isRowSelected(column);
 
-    this.ctx.fillStyle = isRowSeleted
-      ? this.root.styles.cells.selectedBackground
-      : "white";
+    this.ctx.fillStyle = isRowSeleted ? "#c7ebff" : "white";
     this.ctx.strokeStyle = "black";
     this.ctx.lineWidth = this.resizerHeight;
 

src/components/scroller.ts

@@ -1,4 +1,4 @@
-import Spreadsheet, { CSS_PREFIX } from "../main";
+import Spreadsheet, { CSS_PREFIX, Cell, Selection } from "../main";
 import { EventTypes } from "../modules/events";
 import { checkEqualCellSelections } from "../utils/position";
 
@@ -40,10 +40,18 @@ export class Scroller {
     this.element.addEventListener("dblclick", this.handleDoubleClick);
 
     this.element.addEventListener("keydown", this.handleKeydown);
+    this.element.addEventListener("paste", (event) => {
+      if (!this.root.selection.selectedCell) return;
+      this.root.clipboard.paste(
+        this.root,
+        this.root.selection.selectedCell,
+        event,
+      );
+    });
   }
 
   public setSelectingMode(mode: boolean) {
-    this.isSelecting = mode
+    this.isSelecting = mode;
   }
 
   private handleMouseMove = (event: MouseEvent) => {
@@ -51,37 +59,42 @@ export class Scroller {
     const { offsetX, offsetY } = event;
     const lastSelectedCell = this.root.getCellByCoords(offsetX, offsetY);
 
-    let isRangeChanged = false
+    let isRangeChanged = false;
 
     if (this.root.selection.selectedRange) {
-      isRangeChanged = !checkEqualCellSelections(this.root.selection.selectedRange.to, lastSelectedCell)
+      isRangeChanged = !checkEqualCellSelections(
+        this.root.selection.selectedRange.to,
+        lastSelectedCell,
+      );
 
       if (isRangeChanged) {
         this.root.selection.selectedRange.to = lastSelectedCell;
         this.root.events.dispatch({
           type: EventTypes.SELECTION_CHANGE,
           selection: this.root.selection,
-          enableCallback: true
-        })
+          enableCallback: true,
+        });
       }
     }
-
   };
 
   private handleMouseUp = () => {
     this.isSelecting = false;
-    const newSelection = {...this.root.selection}
+    const newSelection = { ...this.root.selection };
 
     if (this.root.selection.selectedRange) {
       if (
-        checkEqualCellSelections(this.root.selection.selectedRange.from, this.root.selection.selectedRange.to)
+        checkEqualCellSelections(
+          this.root.selection.selectedRange.from,
+          this.root.selection.selectedRange.to,
+        )
       ) {
         newSelection.selectedRange = null;
         this.root.events.dispatch({
           type: EventTypes.SELECTION_CHANGE,
           selection: newSelection,
-          enableCallback: false
-        })
+          enableCallback: false,
+        });
       }
     }
 
@@ -98,6 +111,7 @@ export class Scroller {
 
   private handleKeydown = (event: KeyboardEvent) => {
     //* Navigation
+
     if (
       ["ArrowLeft", "ArrowRight", "ArrowUp", "ArrowDown"].includes(event.key)
     ) {
@@ -118,7 +132,7 @@ export class Scroller {
           if (
             this.root.selection.selectedCell &&
             this.root.selection.selectedCell.column <
-            this.root.config.columns.length - 1
+              this.root.config.columns.length - 1
           ) {
             this.root.selection.selectedCell.column += 1;
             // this.root.renderSheet();
@@ -139,7 +153,7 @@ export class Scroller {
           if (
             this.root.selection.selectedCell &&
             this.root.selection.selectedCell.row <
-            this.root.config.rows.length - 1
+              this.root.config.rows.length - 1
           ) {
             this.root.selection.selectedCell.row += 1;
             // this.root.renderSheet();
@@ -150,12 +164,12 @@ export class Scroller {
       this.root.events.dispatch({
         type: EventTypes.SELECTION_CHANGE,
         selection: this.root.selection,
-        enableCallback: true
-      })
+        enableCallback: true,
+      });
     }
 
     //* Start typings
-    const keysRegex = /^([a-z]|[а-я])$/;
+    const keysRegex = /^([a-z]|[а-я]|[0-9]|=)$/;
     if (!event.metaKey && !event.ctrlKey) {
       //* Prevent handle shortcutrs
       const isPressedLetterKey = keysRegex.test(event.key.toLowerCase());
@@ -177,14 +191,51 @@ export class Scroller {
       this.root.deleteSelectedCellsValues();
       this.root.renderSheet();
     }
+
+    if (event.metaKey || event.ctrlKey) {
+      if (event.code === "KeyC") {
+        let cells: Cell[][] = undefined!;
+        const selection = new Selection();
+
+        if (this.root.selection.selectedRange) {
+          const { from, to } = this.root.selection.selectedRange;
+
+          selection.selectedRange = this.root.selection.selectedRange;
+
+          const subArrByRows = this.root.data.slice(from.row, to.row + 1);
+
+          const subArrByCols = subArrByRows.map((row) => {
+            return row.slice(from.column, to.column + 1);
+          });
+
+          cells = [...subArrByCols];
+        } else if (this.root.selection.selectedCell) {
+          const { column, row } = this.root.selection.selectedCell;
+          cells = [[this.root.data[row][column]]];
+          selection.selectedRange = {
+            from: this.root.selection.selectedCell,
+            to: this.root.selection.selectedCell,
+          };
+        } else {
+          return;
+        }
+
+        this.root.clipboard.copy(cells, selection.selectedRange);
+        return;
+      }
+      if (event.code === "KeyV") {
+        // if (!this.root.selection.selectedCell) return;
+        // this.root.clipboard.paste(this.root, this.root.selection.selectedCell);
+      }
+    }
   };
 
   private handleClick = (event: MouseEvent) => {
     this.root.events.dispatch({
       type: EventTypes.CELL_CLICK,
       event,
-      scroller: this
-    })
+      scroller: this,
+    });
   };
 
   private handleScroll = () => {
@@ -231,6 +282,7 @@ export class Scroller {
     this.verticalScroller = verticalScroller;
     this.horizontalScroller = horizontalScroller;
     scroller.appendChild(groupScrollers);
+    scroller.contentEditable = "false";
     scroller.classList.add(CSS_PREFIX + "scroller");
 
     return { scroller, verticalScroller, horizontalScroller };

src/components/sheet.ts

@@ -1,4 +1,4 @@
-import Spreadsheet, { CSS_PREFIX } from "../main";
+import Spreadsheet, { CSS_PREFIX, RenderBox } from "../main";
 import { Position } from "../modules/cell";
 
 /**
@@ -52,12 +52,79 @@ export class Sheet {
     this.root.data[row][column].render(this.root);
   }
 
+  private getSelectionRange() {
+    const { selectedCell, selectedRange } = this.root.selection;
+
+    if (!selectedCell && !selectedRange) return;
+    if (selectedRange) {
+      const startRow = Math.min(selectedRange.from.row, selectedRange.to.row);
+      const startCol = Math.min(
+        selectedRange.from.column,
+        selectedRange.to.column,
+      );
+      const lastRow = Math.max(selectedRange.from.row, selectedRange.to.row);
+      const lastCol = Math.max(
+        selectedRange.from.column,
+        selectedRange.to.column,
+      );
+
+      const startCellBox = new RenderBox(this.root.config, {
+        row: startRow,
+        column: startCol,
+      });
+
+      let width = 0;
+      for (let col = startCol; col <= lastCol; col++) {
+        width += this.root.config.columns[col].width;
+      }
+
+      let height = 0;
+      for (let row = startRow; row <= lastRow; row++) {
+        height += this.root.config.rows[row].height;
+      }
+
+      const x = startCellBox.x - this.root.viewport.left;
+      const y = startCellBox.y - this.root.viewport.top;
+
+      return { x, y, height, width };
+    }
+    if (!selectedRange && selectedCell) {
+      const box = new RenderBox(this.root.config, selectedCell);
+      box.x -= this.root.viewport.left;
+      box.y -= this.root.viewport.top;
+      return box;
+    }
+  }
+
+  private renderSelectionRange(
+    x: number,
+    y: number,
+    width: number,
+    height: number,
+  ) {
+    this.ctx.save();
+    this.ctx.strokeStyle = "#7da8ff";
+    this.ctx.lineWidth = 3;
+    this.ctx.strokeRect(x, y, width, height);
+    this.ctx.fillStyle = "#7da8ff35";
+    this.ctx.fillRect(x, y, width, height);
+    this.ctx.restore();
+  }
+
+  renderSelection() {
+    const box = this.getSelectionRange();
+    if (!box) return;
+    const { height, width, x, y } = box;
+    this.renderSelectionRange(x, y, width, height);
+  }
+
   renderSheet() {
     const firstRowIdx = this.root.viewport.firstRow;
     const lastColIdx = this.root.viewport.lastCol + 3;
     const lastRowIdx = this.root.viewport.lastRow + 3;
     const firstColIdx = this.root.viewport.firstCol;
 
+
     for (let row = firstRowIdx; row <= lastRowIdx; row++) {
       for (let col = firstColIdx; col <= lastColIdx; col++) {
         if (!this.root.config.columns[col] || !this.root.config.rows[row])
@@ -66,5 +133,6 @@ export class Sheet {
         this.renderCell({ column: col, row });
       }
     }
+    this.renderSelection();
   }
 }

src/index.ts

@@ -2,19 +2,21 @@ import Spreadsheet, { SpreadsheetConstructorProperties } from "./main";
 
 const options: SpreadsheetConstructorProperties = {
   onCellClick: (event, cell) => {
-    console.log('Cell click', event, cell)
+    console.log("Cell click", event, cell);
   },
   onSelectionChange: (selection) => {
-    console.log("Changed selection: ", selection)
+    console.log("Changed selection: ", selection);
   },
   onCellChange(cell) {
-    console.log("Cell changed: ", cell)
+    console.log("Cell changed: ", cell);
   },
-}
+  onCopy: (range, data, dataAsString) => {
+    console.log("Copy event: ", range, data, dataAsString)
+  }
+};
 
 const sheet = new Spreadsheet("#spreadsheet", options);
 
-
 function saveDataToLS() {
   const serializableData = sheet.serializeData();
   localStorage.setItem("sheet", JSON.stringify(serializableData));

src/main.ts

@@ -10,7 +10,14 @@ import {
   Position,
   SerializableCell,
 } from "./modules/cell";
-import { CellChangeEvent, CellClickEvent, Config, SelectionChangeEvent, ViewProperties } from "./modules/config";
+import {
+  CellChangeEvent,
+  CellClickEvent,
+  Config,
+  CopyEvent,
+  SelectionChangeEvent,
+  ViewProperties,
+} from "./modules/config";
 import { RangeSelectionType, Selection } from "./modules/selection";
 import { Styles } from "./modules/styles";
 import { Viewport } from "./modules/viewport";
@@ -21,7 +28,9 @@ import { Row } from "./modules/row";
 import { Column } from "./modules/column";
 import { ColumnsBar } from "./components/columnsBar";
 import { RowsBar } from "./components/rowsBar";
-import { Events } from "./modules/events";
+import { EventTypes, Events } from "./modules/events";
+import { Clipboard } from "./modules/clipboard";
+import { FormulaParser } from "./modules/formulaParser";
 
 /*
  ! Component structure
@@ -37,9 +46,10 @@ import { Events } from "./modules/events";
 
 export interface SpreadsheetConstructorProperties {
   view?: ViewProperties;
-  onCellClick?: CellClickEvent | null
-  onSelectionChange?: SelectionChangeEvent | null
-  onCellChange?: CellChangeEvent | null
+  onCellClick?: CellClickEvent | null;
+  onSelectionChange?: SelectionChangeEvent | null;
+  onCellChange?: CellChangeEvent | null;
+  onCopy?: CopyEvent | null
 }
 
 export const CSS_PREFIX = "modern_sc_";
@@ -58,7 +68,9 @@ export default class Spreadsheet {
   public viewport: Viewport;
   public selection: Selection;
   public cache: Cache;
-  public events: Events
+  public events: Events;
+  public clipboard: Clipboard;
+  public formulaParser: FormulaParser
 
   constructor(
     target: string | HTMLElement,
@@ -75,9 +87,10 @@ export default class Spreadsheet {
 
     this.config = new Config(config);
 
-    this.config.onCellClick = props?.onCellClick ?? null
-    this.config.onSelectonChange = props?.onSelectionChange ?? null
-    this.config.onCellChange = props?.onCellChange ?? null
+    this.config.onCellClick = props?.onCellClick ?? null;
+    this.config.onSelectonChange = props?.onSelectionChange ?? null;
+    this.config.onCellChange = props?.onCellChange ?? null;
+    this.config.onCopy = props?.onCopy ?? null
 
     this.rowsBar = new RowsBar(this);
     this.columnsBar = new ColumnsBar(this);
@@ -92,8 +105,9 @@ export default class Spreadsheet {
       this.scroller.getViewportBoundlingRect(),
     );
     this.selection = new Selection();
-    this.events = new Events(this)
-
+    this.events = new Events(this);
+    this.clipboard = new Clipboard(this);
+    this.formulaParser = new FormulaParser(this)
 
     this.data = data;
     this.styles = new Styles();
@@ -113,7 +127,6 @@ export default class Spreadsheet {
   private setColumnsBarPosition() {
     const top = this.toolbar.height;
     const left = this.rowsBar.width;
-    console.log(top, left);
     this.columnsBar.setElementPosition(top, left);
   }
 
@@ -152,8 +165,6 @@ export default class Spreadsheet {
       rows: cachedRows,
     });
 
-    console.log("CACHE: ", cache);
-    console.log("CONFIG: ", this.config);
     return cache;
   }
 
@@ -237,10 +248,19 @@ export default class Spreadsheet {
   changeCellValues(
     position: Position,
     values: Partial<Omit<CellConstructorProps, "position">>,
+    enableCallback: boolean = true
   ) {
     const { column, row } = position;
 
+
     this.data[row][column].changeValues(values);
+
+    this.events.dispatch({
+      type: EventTypes.CELL_CHANGE,
+      cell: this.data[row][column],
+      enableCallback: enableCallback
+    })
+
     this.renderCell(row, column);
   }
 
@@ -295,6 +315,10 @@ export default class Spreadsheet {
     this.sheet.renderSheet();
   }
 
+  renderSelection() {
+    this.sheet.renderSelection();
+  }
+
   renderColumnsBar() {
     this.columnsBar.renderBar();
   }
@@ -309,11 +333,11 @@ export default class Spreadsheet {
 
   public loadData(data: Cell[][] | SerializableCell[][]): Spreadsheet {
     const rowsLength = data.length;
-    const colsLength = data[0] ? this.data[0].length : 0;
+    const colsLength = data[0] ? data[0].length : 0;
     this.data = [];
 
     const formattedData: Cell[][] = [];
-
+    // Transform serialized objects to Cells
     for (let row = 0; row < rowsLength; row++) {
       const innerRow: Cell[] = [];
       for (let col = 0; col < colsLength; col++) {
@@ -331,11 +355,17 @@ export default class Spreadsheet {
       formattedData.push(innerRow);
     }
 
-    this.data = formattedData;
+    const config = this.makeConfigFromData(formattedData, this.config.view);
+    config.onCellChange = this.config.onCellChange
+    config.onCellClick = this.config.onCellClick
+    config.onCopy = this.config.onCopy
+    config.onSelectonChange = this.config.onSelectonChange
 
+
+    this.data = formattedData;
     this.selection.selectedCell = null;
     this.selection.selectedRange = null;
-    this.config = this.makeConfigFromData(formattedData, this.config.view);
+    this.config = config
     this.cache = this.getInitialCache();
     this.scroller.updateScrollerSize();
     this.viewport = new Viewport(
@@ -376,7 +406,7 @@ export default class Spreadsheet {
       view,
       rows,
       columns,
-      onCellClick: null
+      onCellClick: null,
     });
 
     return config;

src/modules/cache.ts

@@ -44,21 +44,21 @@ export class Cache {
   public getRowByYCoord(y: number): number {
     let rowIdx = 0;
     for (let i = 0; i < this.rows.length; i++) {
-      if (y <= this.rows[i].yPos) {
-        //* Intersection detect
-        rowIdx = i;
+      rowIdx = i
+      if (y <= this.rows[i].yPos) {        //* Intersection detect
         break;
       }
+
     }
+
     return rowIdx;
   }
 
   public getColumnByXCoord(x: number): number {
     let colIdx = 0;
     for (let i = 0; i < this.columns.length; i++) {
-      if (x <= this.columns[i].xPos) {
-        //* Intersection detect
-        colIdx = i;
+      colIdx = i
+      if (x <= this.columns[i].xPos) {        //* Intersection detect
         break;
       }
     }

src/modules/cell.ts

@@ -1,4 +1,5 @@
 import Spreadsheet from "../main";
+import { FormulaParser } from "./formulaParser";
 import { RenderBox } from "./renderBox";
 
 export type CellConstructorProps = {
@@ -69,6 +70,9 @@ export class Cell {
   position: Position;
   style: CellStyles | null = null;
 
+  cellsDependsOnThisCell: Position[] = []
+  dependedFromCells: Position[] = []
+
   constructor(props: CellConstructorProps) {
     this.value = props.value;
     this.displayValue = props.displayValue;
@@ -96,50 +100,53 @@ export class Cell {
     Object.assign(this, values);
   }
 
-  private isCellInRange(root: Spreadsheet): boolean {
-    const { column, row } = this.position;
-    const { selectedRange } = root.selection;
+  evalFormula(parser: FormulaParser) {
+    if (this.value.substring(0, 1) !== '=') return;
 
-    if (!selectedRange) return false;
-
-    const isCellInRow =
-      row >= Math.min(selectedRange.from.row, selectedRange.to.row) &&
-      row <= Math.max(selectedRange.to.row, selectedRange.from.row);
-    const isCellInCol =
-      column >= Math.min(selectedRange.from.column, selectedRange.to.column) &&
-      column <= Math.max(selectedRange.to.column, selectedRange.from.column);
-
-    return isCellInCol && isCellInRow;
+    this.resultValue = parser.parser.parse(this.value.slice(1), {
+      col: this.position.column,
+      row: this.position.row
+    })
   }
 
+  // private isCellInRange(root: Spreadsheet): boolean {
+  //   const { column, row } = this.position;
+  //   const { selectedRange } = root.selection;
+
+  //   if (!selectedRange) return false;
+
+  //   const isCellInRow =
+  //     row >= Math.min(selectedRange.from.row, selectedRange.to.row) &&
+  //     row <= Math.max(selectedRange.to.row, selectedRange.from.row);
+  //   const isCellInCol =
+  //     column >= Math.min(selectedRange.from.column, selectedRange.to.column) &&
+  //     column <= Math.max(selectedRange.to.column, selectedRange.from.column);
+
+  //   return isCellInCol && isCellInRow;
+  // }
+
   render(root: Spreadsheet) {
     const renderBox = new RenderBox(root.config, this.position);
     let { x, y } = renderBox;
     const { height, width } = renderBox;
     const { ctx } = root;
 
-    const isCellSelected =
-      root.selection.selectedCell?.row === this.position.row &&
-      root.selection.selectedCell.column === this.position.column;
-    const isCellInRange = this.isCellInRange(root);
+    // const isCellSelected =
+    //   root.selection.selectedCell?.row === this.position.row &&
+    //   root.selection.selectedCell.column === this.position.column;
+    // const isCellInRange = this.isCellInRange(root);
     y -= root.viewport.top;
     x -= root.viewport.left;
 
     const styles = this.style ?? root.styles.cells;
 
     ctx.clearRect(x, y, width, height);
-    ctx.fillStyle =
-      isCellSelected || isCellInRange
-        ? styles.selectedBackground
-        : styles.background;
+    ctx.fillStyle = styles.background;
     ctx.strokeStyle = "black";
     ctx.fillRect(x, y, width - 1, height - 1);
     ctx.strokeRect(x, y, width, height);
 
-    ctx.fillStyle =
-      isCellSelected || isCellInRange
-        ? styles.selectedFontColor
-        : styles.fontColor;
+    ctx.fillStyle = styles.fontColor;
     ctx.textAlign = "left";
     ctx.font = `${styles.fontSize}px Arial`;
     ctx.textBaseline = "middle";

src/modules/clipboard.ts

@@ -0,0 +1,106 @@
+import Spreadsheet, { RangeSelectionType } from "../main";
+import { Cell, CellConstructorProps, CellStyles, Position } from "./cell";
+import { EventTypes } from "./events";
+
+export class Clipboard {
+  saved: Cell[][] | null = null;
+  root: Spreadsheet;
+  constructor(root: Spreadsheet) {
+    this.root = root;
+  }
+
+  copy(data: Cell[][], range: RangeSelectionType) {
+    const mapedData = data
+      .map((row) => {
+        return row
+          .map((item) => {
+            return item.displayValue;
+          })
+          .join("\t");
+      })
+      .join("\n");
+
+    this.saved = data;
+    navigator.clipboard.writeText(mapedData);
+
+    this.root.events.dispatch({
+      type: EventTypes.COPY_CELLS,
+      data,
+      dataAsString: mapedData,
+      range,
+    });
+  }
+
+  paste(root: Spreadsheet, { column, row }: Position, event: ClipboardEvent) {
+    if (!this.saved) {
+      if (!event.clipboardData) return;
+      const data = event.clipboardData.getData("text");
+      try {
+        const arr = data.split("\n").map((item) => item.split("\t"));
+        const arrayOfCells = arr.map((innerRow) => {
+          return innerRow.map((item) => {
+            const cellProps: CellConstructorProps = {
+              displayValue: item,
+              position: {
+                column,
+                row,
+              },
+              resultValue: item,
+              style: new CellStyles(),
+              value: item,
+            };
+            return new Cell(cellProps);
+          });
+        });
+
+        const rowsLength = arrayOfCells.length;
+        const colsLength = arrayOfCells[0] ? arrayOfCells[0].length : 0;
+
+        for (let i = 0; i < rowsLength; i++) {
+          for (let j = 0; j < colsLength; j++) {
+            const savedCell = arrayOfCells[i][j];
+
+            const position = {
+              column: column + j,
+              row: row + i,
+            };
+
+            const values = {
+              displayValue: savedCell.displayValue,
+              value: savedCell.value,
+              style: savedCell.style,
+            };
+
+            root.changeCellValues(position, values, false);
+          }
+        }
+      } catch (err) {
+        console.error("Cannot read clipboard. ", err);
+      }
+      root.renderSheet();
+      return;
+    }
+
+    const rowsLength = this.saved.length;
+    const colsLength = this.saved[0] ? this.saved[0].length : 0;
+
+    for (let i = 0; i < rowsLength; i++) {
+      for (let j = 0; j < colsLength; j++) {
+        const savedCell = this.saved[i][j];
+
+        const position = {
+          column: column + j,
+          row: row + i,
+        };
+
+        const values = {
+          displayValue: savedCell.displayValue,
+          value: savedCell.value,
+          style: savedCell.style,
+        };
+
+        root.changeCellValues(position, values, false);
+      }
+    }
+  }
+}

src/modules/config.ts

@@ -1,15 +1,20 @@
 import { Cell } from "./cell";
 import { Column } from "./column";
 import { Row } from "./row";
-import { Selection } from "./selection";
+import { RangeSelectionType, Selection } from "./selection";
 
 export interface ViewProperties {
   width: number;
   height: number;
 }
-export type CellClickEvent = (event: MouseEvent, cell: Cell) => void
-export type SelectionChangeEvent = (selection: Selection) => void
-export type CellChangeEvent = (cell: Cell) => void
+export type CellClickEvent = (event: MouseEvent, cell: Cell) => void;
+export type SelectionChangeEvent = (selection: Selection) => void;
+export type CellChangeEvent = (cell: Cell) => void;
+export type CopyEvent = (
+  range: RangeSelectionType,
+  data: Cell[][],
+  dataAsString: string,
+) => void;
 
 export type ConfigProperties = {
   /** Please, end it with '_' symbol.
@@ -21,9 +26,10 @@ export type ConfigProperties = {
   rows: Row[];
   columns: Column[];
   view: ViewProperties;
-  onCellClick?: CellClickEvent | null
-  onSelectionChange?: SelectionChangeEvent | null
-  onCellChange?: CellChangeEvent | null
+  onCellClick?: CellClickEvent | null;
+  onSelectionChange?: SelectionChangeEvent | null;
+  onCellChange?: CellChangeEvent | null;
+  onCopy?: CopyEvent | null;
 };
 
 export type SheetConfigConstructorProps = {
@@ -39,17 +45,19 @@ export class Config {
     height: 600,
   };
 
-  onCellClick: ((event: MouseEvent, cell: Cell) => void) | null = null
-  onSelectonChange: SelectionChangeEvent | null = null
-  onCellChange: CellChangeEvent | null = null
+  onCellClick: CellClickEvent | null = null;
+  onSelectonChange: SelectionChangeEvent | null = null;
+  onCellChange: CellChangeEvent | null = null;
+  onCopy: CopyEvent | null;
 
   constructor(props: ConfigProperties) {
     this.columns = props.columns;
     this.rows = props.rows;
     this.view = props.view;
 
-    this.onCellClick = props.onCellClick ?? null
-    this.onSelectonChange = props.onSelectionChange ?? null
-    this.onCellChange = props.onCellChange ?? null
+    this.onCellClick = props.onCellClick ?? null;
+    this.onSelectonChange = props.onSelectionChange ?? null;
+    this.onCellChange = props.onCellChange ?? null;
+    this.onCopy = props.onCopy ?? null;
   }
 }

src/modules/events.ts

@@ -1,107 +1,142 @@
 import { Scroller } from "../components/scroller";
-import Spreadsheet, { Cell, CellConstructorProps, Selection } from "../main";
+import Spreadsheet, { Cell, RangeSelectionType, Selection } from "../main";
 
 export enum EventTypes {
-    CELL_CLICK = "CELL_CLICK",
-    SELECTION_CHANGE = "CHANGE_SELECTION",
-    CELL_CHANGE = "CELL_CHANGE"
+  CELL_CLICK = "CELL_CLICK",
+  SELECTION_CHANGE = "CHANGE_SELECTION",
+  CELL_CHANGE = "CELL_CHANGE",
+  COPY_CELLS = "COPY_CELLS",
 }
 
 export type CellClickEvent = {
-    type: EventTypes.CELL_CLICK
-    event: MouseEvent
-    scroller: Scroller
-}
+  type: EventTypes.CELL_CLICK;
+  event: MouseEvent;
+  scroller: Scroller;
+};
 
 export type ChangeSelectionEvent = {
-    type: EventTypes.SELECTION_CHANGE,
-    selection: Selection
-    enableCallback?: boolean
-}
+  type: EventTypes.SELECTION_CHANGE;
+  selection: Selection;
+  enableCallback?: boolean;
+};
 
 export type ChangeCellEvent = {
-    type: EventTypes.CELL_CHANGE,
-    cell: Cell,
-    values: Partial<Omit<CellConstructorProps, "position">>
-}
+  type: EventTypes.CELL_CHANGE;
+  cell: Cell;
+  enableCallback?: boolean;
+};
+
+export type CopyAction = {
+  type: EventTypes.COPY_CELLS;
+  range: RangeSelectionType;
+  data: Cell[][];
+  dataAsString: string;
+};
+
+export type ActionTypes =
+  | CellClickEvent
+  | ChangeSelectionEvent
+  | ChangeCellEvent
+  | CopyAction;
 
-export type ActionTypes = CellClickEvent | ChangeSelectionEvent | ChangeCellEvent
 
 export class Events {
+  root: Spreadsheet;
 
-    root: Spreadsheet
+  constructor(root: Spreadsheet) {
+    this.root = root;
+  }
 
-    constructor(root: Spreadsheet) {
-        this.root = root
-    }
+  async dispatch(action: ActionTypes) {
+    switch (action.type) {
+      case EventTypes.CELL_CLICK: {
+        const { event, scroller } = action;
+        //
+        //* Here may be side effects
+        //
+        this.cellClick(event, scroller);
+        break;
+      }
 
-    dispatch(action: ActionTypes) {
-        switch (action.type) {
-            case EventTypes.CELL_CLICK: {
-                const { event, scroller } = action
-                //
-                //* Here may be side effects
-                //
-                this.cellClick(event, scroller)
-                break;
-            }
+      case EventTypes.SELECTION_CHANGE: {
+        const { selection, enableCallback } = action;
+        //
+        //* Here may be side effects
+        //
+        this.changeSelection(selection, enableCallback);
+        break;
+      }
 
-            case EventTypes.SELECTION_CHANGE: {
-                const { selection, enableCallback } = action
-                //
-                //* Here may be side effects
-                //
-                this.changeSelection(selection, enableCallback)
-                break;
-            }
-
-            case EventTypes.CELL_CHANGE: {
-                const { cell, values } = action
-                //
-                //* Here may be side effects
-                //
-                this.changeCellValues(cell, values)
-                break;
-            }
-
-            default: {
-                break;
-            }
+      case EventTypes.CELL_CHANGE: {
+        const { cell, enableCallback } = action;
+        if (cell.value.substring(0, 1).startsWith('=')) {
+          try {
+            await cell.evalFormula(this.root.formulaParser)
+            cell.displayValue = cell.resultValue
+            this.root.renderCell(cell.position.row, cell.position.column)
+            this.changeCellValues(cell, enableCallback);
+            return;
+          }
+          catch (err) {
+            console.error(err)
+          }
         }
+
+        this.root.renderCell(cell.position.row, cell.position.column)
+        this.changeCellValues(cell, enableCallback);
+        break;
+      }
+
+      case EventTypes.COPY_CELLS: {
+        const { data, dataAsString, range } = action;
+        this.copy(range, data, dataAsString);
+        break;
+      }
+
+      default: {
+        break;
+      }
     }
+  }
 
-    private cellClick = (event: MouseEvent, scroller: Scroller) => {
-        if (event.button !== 0) return; // Left mouse button
-        const { offsetX, offsetY } = event;
-        const clickedCell = this.root.getCellByCoords(offsetX, offsetY);
-        const cell = this.root.getCell(clickedCell)
+  private cellClick = (event: MouseEvent, scroller: Scroller) => {
+    if (event.button !== 0) return; // Left mouse button
+    const { offsetX, offsetY } = event;
+    const clickedCell = this.root.getCellByCoords(offsetX, offsetY);
+    const cell = this.root.getCell(clickedCell);
 
-        const selection = new Selection()
-        selection.selectedCell = clickedCell
-        selection.selectedRange = {
-            from: clickedCell,
-            to: clickedCell,
-        };
+    const selection = new Selection();
+    selection.selectedCell = clickedCell;
+    selection.selectedRange = {
+      from: clickedCell,
+      to: clickedCell,
+    };
 
-        scroller.setSelectingMode(true);
+    scroller.setSelectingMode(true);
 
-        this.changeSelection(selection, true)
+    this.changeSelection(selection, true);
 
-        this.root.config.onCellClick?.(event, cell)
-    }
+    this.root.config.onCellClick?.(event, cell);
+  };
 
-    private changeSelection = (selection: Selection, enableCallback = false) => {
-        this.root.selection = selection
+  private changeSelection = (selection: Selection, enableCallback = false) => {
+    this.root.selection = selection;
 
-        if (enableCallback) this.root.config.onSelectonChange?.(selection)
-        this.root.renderSheet();
-        this.root.renderColumnsBar();
-        this.root.renderRowsBar();
-    }
+    if (enableCallback) this.root.config.onSelectonChange?.(selection);
+    this.root.renderSheet();
+    this.root.renderColumnsBar();
+    this.root.renderRowsBar();
+  };
 
-    private changeCellValues(cell: Cell, values: Partial<Omit<CellConstructorProps, "position">>) {
-        this.root.changeCellValues(cell.position, values)
+  private changeCellValues(cell: Cell, enableCallback: boolean = true) {
+    if (enableCallback) this.root.config.onCellChange?.(cell);
+  }
 
-        this.root.config.onCellChange?.(cell)
-    }
+  private copy = (
+    range: RangeSelectionType,
+    data: Cell[][],
+    dataAsString: string,
+  ) => {
+    this.root.config.onCopy?.(range, data, dataAsString);
+  };
 }

src/modules/formulaParser.ts

@@ -0,0 +1,23 @@
+import Parser, { DepParser } from 'fast-formula-parser'
+import Spreadsheet from '../main'
+
+export class FormulaParser {
+    parser: Parser
+    depParser: DepParser
+    root: Spreadsheet
+    constructor(root: Spreadsheet) {
+        this.root = root
+
+        this.parser = new Parser({
+            onCell: ({col, row}) => {
+                const cell = this.root.data[row - 1][col - 1]
+                const cellValue = cell.resultValue.length > 0 ? cell.resultValue : cell.value
+                if( cellValue &&  isNaN(Number(cellValue)) === false) return Number(cellValue)
+                return this.root.data[row - 1][col - 1].resultValue ?? ''
+            },
+        })
+
+        this.depParser = new DepParser({})
+        this.depParser
+    }
+}

src/types/fast-formula-parser.d.ts

@@ -0,0 +1,68 @@
+declare module 'fast-formula-parser' {
+    export type PositionWithSheet = {
+        sheet?: string
+        row: number
+        col: number
+    }
+
+    export type FunctionArgument = {
+        isArray: boolean
+        isCellRef: boolean
+        isRangeRef: boolean
+        value: string | number
+    }
+
+    export type Position = {
+        col: number
+        row: number
+    }
+
+    export type RangeReference = {
+        sheet?: string
+        from: Position,
+        to: Position
+    }
+
+    export type Config = {
+        functions?: Record<string, (...args: FunctionArgument[]) => string>
+        functionsNeedContext?: (context: Parser, ...args: FunctionArgument[]) => string
+        onCell?: (position: PositionWithSheet) => number | string
+        onRange?: (ref) => Array<string|number>[]
+        onVariable?: (name: string, sheetName: string) => RangeReference
+    }
+
+    export const Types = {
+        NUMBER: 0,
+        ARRAY: 1,
+        BOOLEAN: 2,
+        STRING: 3,
+        RANGE_REF: 4, // can be 'A:C' or '1:4', not only 'A1:C3'
+        CELL_REF: 5,
+        COLLECTIONS: 6, // Unions of references
+        NUMBER_NO_BOOLEAN: 10,
+    };
+
+    export const Factorials: number[]
+
+    export default class Parser {
+        constructor(config: Config)
+        parse: (expression: string, position: PositionWithSheet) => string
+        parseAsync: (expression: string, position: PositionWithSheet) => Promise<string>
+
+    }
+
+
+    type FormulaHelpersType = {
+        accept: (param: FunctionArgument, type?: number, defValue?: number | string, flat?: boolean, allowSingleValue?: boolean) => number | string
+        type: (variable) => number
+        isRangeRef: (param) => boolean
+        isCellRef: (param) => boolean 
+    }
+
+    export class DepParser {
+        constructor(config?: {onVariable?: (name: string, sheetName: string) => RangeReference})
+        parse(expression: string, position: PositionWithSheet): PositionWithSheet[]
+    }
+
+    export const FormulaHelpers: FormulaHelpersType
+}

src/utils/position.ts

@@ -1,12 +1,20 @@
 import { BaseSelectionType, RangeSelectionType } from "../main";
 
-export function checkEqualRanges(range1: RangeSelectionType, range2: RangeSelectionType) {
-    const equalRows = range1.from.row === range2.to.row
-    const equalColumns = range1.from.column === range2.to.column
+export function checkEqualRanges(
+  range1: RangeSelectionType,
+  range2: RangeSelectionType,
+) {
+  const equalRows = range1.from.row === range2.to.row;
+  const equalColumns = range1.from.column === range2.to.column;
 
-    return equalRows && equalColumns
+  return equalRows && equalColumns;
 }
 
-export function checkEqualCellSelections(selection1: BaseSelectionType, selection2: BaseSelectionType) {
-    return selection1.column === selection2.column && selection1.row === selection2.row
+export function checkEqualCellSelections(
+  selection1: BaseSelectionType,
+  selection2: BaseSelectionType,
+) {
+  return (
+    selection1.column === selection2.column && selection1.row === selection2.row
+  );
 }

tsconfig.json

@@ -5,7 +5,7 @@
     "types": ["vite/client", "node"],
     "allowJs": false,
     "skipLibCheck": true,
-    "esModuleInterop": false,
+    "esModuleInterop": true,
     "allowSyntheticDefaultImports": true,
     "strict": true,
     "forceConsistentCasingInFileNames": true,

vite.config.ts

@@ -2,14 +2,16 @@ import { defineConfig } from "vite";
 import path from "path";
 import typescript from "@rollup/plugin-typescript";
 import { typescriptPaths } from "rollup-plugin-typescript-paths";
-import { fileURLToPath } from "node:url";
 
-export default defineConfig({
+const BROWSER_MODE = process.env.BUILD_BROWSER === 'true';
+console.log({ BROWSER_MODE });
+
+const libConfig = defineConfig({
   base: "/modern_spreadsheet/",
   plugins: [],
   resolve: {},
   server: {
-    port: 3000,
+    port: 5179,
     open: true,
   },
   build: {
@@ -37,3 +39,23 @@ export default defineConfig({
     },
   },
 });
+
+const browserConfig = defineConfig({
+  base: "/modern_spreadsheet/",
+  resolve: {},
+  build: {
+    manifest: true,
+    minify: true,
+    reportCompressedSize: true,
+    sourcemap: true,
+    lib: {
+      entry: path.resolve(__dirname, 'index.html'),
+      fileName: 'demo',
+      formats: ['es']
+    }
+  }
+})
+
+const config = BROWSER_MODE ? browserConfig : libConfig;
+
+export default config;