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https://github.com/estie-inc/wasm-xlsxwriter
Generate Excel files in-browser with WebAssembly.
https://github.com/estie-inc/wasm-xlsxwriter
excel frontend javascript typescript wasm
Last synced: about 14 hours ago
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Generate Excel files in-browser with WebAssembly.
- Host: GitHub
- URL: https://github.com/estie-inc/wasm-xlsxwriter
- Owner: estie-inc
- License: other
- Created: 2024-09-16T05:10:02.000Z (3 months ago)
- Default Branch: main
- Last Pushed: 2024-12-17T02:57:49.000Z (8 days ago)
- Last Synced: 2024-12-21T13:15:28.312Z (4 days ago)
- Topics: excel, frontend, javascript, typescript, wasm
- Language: Rust
- Homepage:
- Size: 248 KB
- Stars: 90
- Watchers: 5
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# wasm-xlsxwriter [![NPM Version](https://img.shields.io/npm/v/wasm-xlsxwriter)](https://www.npmjs.com/package/wasm-xlsxwriter)
The `wasm-xlsxwriter` library is a lightweight wrapper around the write API of Rust's [`rust_xlsxwriter`](https://crates.io/crates/rust_xlsxwriter), compiled to WebAssembly (Wasm) with minimal setup to make it easily usable from JavaScript or Node.js.
With this library, you can generate Excel files in the browser or Node.js using JavaScript, complete with support for custom formatting, formulas, links, images, and more.
## Getting Started
To get started, install the library via npm:
```bash
npm install wasm-xlsxwriter
```### Usage Web
Here’s an example of how to use `wasm-xlsxwriter` to create an Excel file:
```typescript
import xlsxInit, {
Format,
FormatAlign,
FormatBorder,
Formula,
Workbook,
Image,
Url,
} from "wasm-xlsxwriter/web";// Load the WebAssembly module and initialize the library.
await xlsxInit();// Create a new Excel file object.
const workbook = new Workbook();// Create some formats to use in the worksheet.
const boldFormat = new Format().setBold();
const decimalFormat = new Format().setNumFormat("0.000");
const dateFormat = new Format().setNumFormat("yyyy-mm-dd");
const mergeFormat = new Format()
.setBorder(FormatBorder.Thin)
.setAlign(FormatAlign.Center);// Add a worksheet to the workbook.
const worksheet = workbook.addWorksheet();// Set the column width for clarity.
worksheet.setColumnWidth(0, 22);// Write a string without formatting.
worksheet.write(0, 0, "Hello");// Write a string with the bold format defined above.
worksheet.writeWithFormat(1, 0, "World", boldFormat);// Write some numbers.
worksheet.write(2, 0, 1);
worksheet.write(3, 0, 2.34);// Write a number with formatting.
worksheet.writeWithFormat(4, 0, 3.0, decimalFormat);// Write a formula.
worksheet.write(5, 0, new Formula("=SIN(PI()/4)"));// Write a date.
const date = new Date(2023, 1, 25);
worksheet.writeWithFormat(6, 0, date, dateFormat);// Write some links.
worksheet.write(7, 0, new Url("https://www.rust-lang.org"));
worksheet.write(8, 0, new Url("https://www.rust-lang.org").setText("Rust"));// Write some merged cells.
worksheet.mergeRange(9, 0, 9, 1, "Merged cells", mergeFormat);// Insert an image (ensure `imageBuffer` contains the image data).
const image = new Image(imageBuffer);
worksheet.insertImage(1, 2, image);// Save the file to a buffer.
const buf = workbook.saveToBufferSync();
```### Usage Node.js
```ts
import {
Color,
DocProperties,
Format,
FormatAlign,
Workbook,
} from "wasm-xlsxwriter";/**
* Demo function that create a xlsx buffer from a header array and data rows
*
* @param {string[]} header - Sheet header strings
* @param {(string | number)[][]} rows - Array of arrays containing sheet rows
* @returns {Buffer} Excel file data
*/
function writeExcel(header: string[], rows: (string | number)[][]): Buffer {
// Create a new Excel file object.
const workbook = new Workbook();// Set a doc property
const props = new DocProperties().setCompany("Test, Inc.");
workbook.setProperties(props);// Add a worksheet with name to the workbook.
const worksheet = workbook.addWorksheet();
worksheet.setName("Export");// Create some formats to use in the worksheet.
const headerStyle = new Format();
headerStyle
.setAlign(FormatAlign.Top)
.setTextWrap()
.setBackgroundColor(Color.red());// Write sheet header
worksheet.writeRowWithFormat(0, 0, header, headerStyle);// Write sheet data
worksheet.writeRowMatrix(1, 0, rows);// Autofit columns
worksheet.autofit();// Freeze header
worksheet.setFreezePanes(1, 0);// Add autofilter to header
worksheet.autofilter(0, 0, rows.length, header.length - 1);// Return buffer with xlsx data
const uint8Array = workbook.saveToBufferSync();
return Buffer.from(uint8Array);
}
```## License
MIT