Allow wasm-xlsxwriter to be used from both from web and nodejs

.gitignore

@@ -1,5 +1,6 @@
 rust/target
 rust/pkg
+pkg.*
 
 **/node_modules
 **/*.xlsx

README.md

@@ -1,8 +1,8 @@
 # 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.
+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 using JavaScript, complete with support for custom formatting, formulas, links, images, and more.
+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
 
@@ -12,7 +12,7 @@ To get started, install the library via npm:
 npm install wasm-xlsxwriter
 ```
 
-### Usage
+### Usage Web
 
 Here’s an example of how to use `wasm-xlsxwriter` to create an Excel file:
 
@@ -82,6 +82,58 @@ worksheet.insertImage(1, 2, image);
 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

build.js

@@ -0,0 +1,21 @@
+
+import shell from 'shelljs';
+
+if (!shell.which('wasm-pack')) {
+	console.error("Run npm install to install all dependencies first");
+}
+
+// Clean up any existing build
+shell.rm('-rf', 'pkg.*');
+
+// Create the node output
+shell.exec('wasm-pack build ./rust --target nodejs --out-dir ../pkg.node --release');
+
+// Create the web output
+shell.exec('wasm-pack build ./rust --target web --out-dir ../pkg.web --release');
+
+// Create the bundler output
+// shell.exec('wasm-pack build ./rust --target bundler --out-dir ../pkg.bundler --release');
+
+// Clean up
+shell.rm('pkg.*/.gitignore');

examples/nextjs/app/page.tsx

@@ -1,5 +1,5 @@
 "use client";
-import initModule, { Workbook } from "wasm-xlsxwriter";
+import initModule, { Workbook } from "wasm-xlsxwriter/pkg.web";
 
 export default function Page() {
   return (