Syncfusion JavaScript Spreadsheet Editor

Overview

This skill helps developers generate TypeScript code for integrating the Syncfusion Spreadsheet Editor into their JavaScript applications. It provides ready-to-use code snippets, API guidance, and best practices for building Excel-like functionality in JavaScript (ES6) projects.

Key Capabilities

• File Operations: Import/export Excel files (xlsx, xls, xlsb), CSV files, and PDF export
• Data Management: Data binding, editing, sorting, filtering, and validation
• Cell Operations: Formatting (fonts, colors, borders, alignment), merge cells, wrap text
• Formulas & Calculations: Built-in Excel formulas, custom functions, named ranges
• Collaboration: Notes, comments, and threaded discussions
• Advanced Features: Charts, images, hyperlinks, conditional formatting, freeze panes, sheet protection, virtualization for large datasets

Quick Start Examples

Example 1: Generate Spreadsheet with Formatting

User: "Create a Spreadsheet with data and apply cell styles"

Result: A TypeScript code snippet is generated that loads provided data into the Spreadsheet and applies basic cell formatting.

Example 2: Generate Code for Loading a File

User: "Create a Spreadsheet and load an Excel file initially"

Result: A TypeScript code snippet is generated that initializes the Spreadsheet and programmatically opens an Excel file on startup.

Getting Started — Minimal JavaScript (ES6) Code

Minimal JavaScript (ES6) setup for a plain web project:

import { Spreadsheet } from '@syncfusion/ej2-spreadsheet';

const spreadsheet = new Spreadsheet({
  sheets: [{ rows: [{ cells: [{ value: 'Hello, Spreadsheet!' }] }] }],
  created: () => {
    // All post-initialization code goes here
  }
});
spreadsheet.appendTo('#spreadsheet');

Placeholders:

• #spreadsheet — HTML element ID where the component renders
• sheets — array of sheet objects with data

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Generate TypeScript Code for the User's Project

Trigger keywords: "javascript spreadsheet", "spreadsheet editor", "syncfusion spreadsheet", "excel component", "load excel file", "open excel file", "import excel", "export excel file", "save excel", "export to pdf", "export to csv", "view excel", "configure spreadsheet", "create spreadsheet", "add spreadsheet", "spreadsheet data", "cell formatting", "apply formulas", "insert chart", "data binding", "spreadsheet validation", "freeze panes", "protect sheet"

Workflow:

1. Identify the requested Spreadsheet feature (data binding, formulas, charts, export, etc.).

2. Read the relevant references/*.md file(s) to understand the APIs and code patterns for the requested feature.

3. STOP before generating code. Check if the user has already chosen a delivery mode.

4. If no delivery mode is chosen yet, you MUST ask the user first using this concise multiple-choice question:

   "How would you like to receive the generated Spreadsheet code?"

   • Option 1: Replace the code in a specific project file (you'll need to provide the file path and confirm)
   • Option 2: Save the code in this skill's output folder at {skill-root}/syncfusion-javascript-spreadsheet-editor/output/app.ts
   • Option 3: Share the code directly in the chat window

5. Only after the user selects a delivery mode, proceed to generate TypeScript code using the APIs and snippets from references/*.md, substituting concrete placeholders from the user's project.

6. Scope implementations within the created event handler — All code implementations should be placed within the Spreadsheet's created event unless the user explicitly requests a different event handler (e.g., beforeSave, cellSaving, etc.).

7. Do NOT make changes to workspace project files unless the user explicitly chose Option 1 and provided the file path with permission.

8. Provide complete TypeScript snippets and concise integration steps after delivering the code.

Refer to ## Rules section for operational constraints (output directory, temporary files, allowed libraries, etc.)

Code References

All code snippets and examples are in the references/ folder. Each file contains:

• Minimal TypeScript Code — a working, ready-to-use snippet
• Placeholders — values the user must customize
• Notes — TypeScript best practices and constraints

File	Topic
initialization.md	Basic TypeScript setup and options
data-binding.md	Local arrays, JSON, remote (DataManager)
formulas.md	Formulas, aggregates, named ranges
formatting.md	Cell formatting, borders, wrap text
number-formatting.md	Number formatting, decimals, currency, date
conditional-formatting.md	Rules, highlights based on conditions
data-validation.md	Validation rules, invalid highlights
sorting-filtering.md	Sorting, filtering
find-replace.md	Find, replace
import-export.md	Save (XLSX/CSV/PDF), open, openFromJson
charts.md	Insert, edit, delete charts
images.md	Insert, modify pictures
hyperlink.md	Add, remove hyperlinks
comments.md	Threaded comments, replies, resolve threads
notes.md	Simple cell notes, sticky visibility, add/edit/delete
protection.md	Sheet protection, cell locking, permissions
edit-cell.md	startEdit, endEdit, updateCell, edit modes
freeze-panes.md	Freeze rows/columns, split panes
row-column.md	Insert, delete, resize rows/columns, hide
merge-cells.md	Merge, unmerge cells, spanning
print.md	Page setup, headers/footers, scaling, margins
misc-operations.md	Autofill, clear, sheet management, goTo
clipboard.md	Copy, cut, paste with different paste types
selection.md	Select cells/ranges, multi-select, getSelectedRange
scrolling-virtualization.md	Virtual scrolling, large datasets, performance
wrap.md	Text wrapping, multi-line display, row height
defined-names.md	Named ranges, define names, refersTo format
custom-functions.md	Custom calculation functions, addCustomFunction
ribbon-customization.md	Ribbon tabs, toolbar items, file menu customization
context-menu.md	Right-click context menu, contextMenuBeforeOpen
localization.md	Multi-language, locale, RTL, number/date formats
events.md	Event handling, event properties, event patterns
autofill.md	Autofill patterns, fill types, series

Key Rules for Code Generation (TypeScript-first)

1. TypeScript-first snippets — All examples and snippets must be written in TypeScript and compile with the current @syncfusion/ej2-spreadsheet npm package.

2. No inline code in this manifest — Refer to references/*.md for runnable snippets; keep this file as the concise policy and index.

3. Default event scoping — All implementations must be placed within the Spreadsheet's created event handler unless the user explicitly requests implementation in another event (e.g., beforeSave, cellSaving, etc.). This ensures all operations occur after the Spreadsheet component is fully initialized.

4. Reference file requirements — Each reference must include:

   • Minimal TypeScript Code (complete, runnable)
   • Placeholders (clearly marked values to replace)
   • Notes (TypeScript integration steps and best practices)

5. License handling — Do not hardcode license keys; refer users to env variables or project config.

6. Preserve data integrity — Preserve existing formulas, references, and formatting when generating or editing sheets.

7. No hallucinated APIs — Use verified Syncfusion Spreadsheet Editor method names only.

8. Read references first — For any requested feature, always read the relevant references/*.md file(s) first before generating code.

9. Build strictly from references — Build TypeScript code strictly from the APIs, methods, properties, events, and snippets found in the reference files. Do NOT invent, guess, or suggest any API, method, property, or event not explicitly present in the reference files.

Rules

• Output files must go in {skill-root}/syncfusion-javascript-spreadsheet-editor/output/ directory when user selects Option 2
• Only use Syncfusion Spreadsheet APIs — never recommend or use alternative spreadsheet libraries (e.g., handsontable, ag-grid, luckysheet)
• No temporary files — never create temporary scripts, intermediate files, or scaffolding outside the output directory
• TypeScript-only code — all generated code must be valid TypeScript, never generate vanilla JavaScript, jQuery, or framework-specific patterns