In today's data-driven landscape, efficiently handling Excel files is crucial for web applications. React, a widely-used JavaScript library for user interfaces, can significantly enhance its capabilities by integrating Spire.XLS for JavaScript. This integration allows developers to perform complex operations like reading, writing, and formatting Excel files directly within their React projects.

This article will walk you through the integration of Spire.XLS for JavaScript into your React projects, covering everything from the initial setup to a straightforward usage example.

• Benefits of Using Spire.XLS for JavaScript in React Projects
• Set Up Your Environment
• Integrate Spire.XLS for JavaScript in Your Project
• Create and Save Excel Files Using JavaScript

Benefits of Using Spire.XLS for JavaScript in React Projects

React, a popular JavaScript library for building user interfaces, has revolutionized web development by enabling developers to create interactive and dynamic user experiences. On the other hand, Spire.XLS for JavaScript is a powerful library that allows developers to manipulate Excel files directly in the browser.

By integrating Spire.XLS for JavaScript into your React project, you can add advanced Excel capabilities to your application. Here are some of the key advantages:

• Enhanced Functionality: Spire.XLS for JavaScript enables creating, modifying, and formatting Excel files directly in the browser, enhancing your React app's capabilities and user experience.
• Improved Data Management: Easily import, export, and manipulate Excel files with Spire.XLS, streamlining data management and reducing errors.
• Cross-Browser Compatibility: Designed to work seamlessly across major web browsers, Spire.XLS ensures consistent handling of Excel files in your React application.
• Seamless Integration: Compatible with various JavaScript frameworks, including React, Spire.XLS integrates easily into existing projects without disrupting your workflow.

Set Up Your Environment

Step 1. Install Node.js and npm

Download and install Node.js from the official website. Make sure to choose the version that matches your operating system.

After the installation is complete, you can verify that Node.js and npm are working correctly by running the following commands in your terminal:

node -v
npm -v

Step 2. Create a New React Project

Create a new React project named my-app using Create React App from terminal:

npx create-react-app my-app

Once the project is created, you can navigate to the project directory and start the development server using the following commands:

cd my-app
npm start

If your React project is compiled successfully, the app will be served at http://localhost:3000, allowing you to view and test your application in a browser.

To visually browse and manage the files in your project, you can open the project using VS Code.

Integrate Spire.XLS for JavaScript in Your Project

Download Spire.XLS for JavaScript from our website and unzip it to a location on your disk. The downloaded product package has been integrated Spire.Doc for JavaScript，Spire.XLS for JavaScript，Spire.PDF for JavaScript，Spire.Presentation for JavaScript. To use the functionality of Spire.XLS for JavaScript, you need to copy the corresponding files (spire.xls.js, Spire.Xls.Wasm.zip, spire.common.js, Spire.Common.Wasm.zip, and _framework) to the project's “public” folder.

You can also install Spire.XLS for JavaScript using npm. In the terminal within VS Code, run the following command:

npm i spire.office

After downloading this command, find the corresponding file in the node_comodules/spire.office path of the project and copy it to “public” folder.

At the same time, in order to ensure text rendering, the related font files can be added with custom paths. In the following example, the font addition path is: public\font.

Create Excel files using JavaScript

Modify the code in the "App.js" file to generate an Excel file using the WebAssembly (WASM) module. Specifically, utilize the Spire.XLS for JavaScript library for Excel file manipulation.

import React, { useState, useEffect } from 'react';

function App() {
  const [wasmModule, setWasmModule] = useState(null);
  // Load Spire.XLS
  useEffect(() => {
    (async () => {
      try {
        const publicUrl = process.env.PUBLIC_URL || '';
        const spireModule = await import(/* webpackIgnore: true */ `${publicUrl}/spire.xls.js`);
        const rawModule = spireModule.default || spireModule;
        window.wasmModule = typeof rawModule === 'function'
          ? await rawModule({ locateFile: p => p.endsWith('.wasm') ? `${publicUrl}/${p}` : p })
          : rawModule;
        setWasmModule(window.wasmModule);
      } catch (error) {
        console.error('Failed to load spire.xls.js WASM module:', error);
      }
    })();
  }, []);

  // Create HelloWorld.xlsx
  const ExcelToPDF = async () => {
    const wasmModule = window.wasmModule.spirexls;

    if (wasmModule) {
      // Load font into virtual file system (VFS)
      await window.spire.FetchFileToVFS('arial.ttf', '/Library/Fonts/', `${process.env.PUBLIC_URL}/font/`);

      // Create a new workbook
      const workbook = new wasmModule.Workbook();

      // Clear default worksheets
      workbook.Worksheets.Clear();

      // Add a new worksheet named "MySheet"
      const sheet = workbook.Worksheets.Add("MySheet");

      // Set the text of cell "A1"
      sheet.Range.get("A1").Text = "Hello World";

      // Set column width to auto-fit
      sheet.Range.get("A1").AutoFitColumns();

      // Define output file name
      const outputFileName = 'HelloWorld.xlsx';

      // Save the workbook to the specified path
      workbook.SaveToFile({ fileName: outputFileName, version: wasmModule.ExcelVersion.Version2010 });

      // Read the saved file and convert to Blob object
      const modifiedFileArray = window.dotnetRuntime.Module.FS.readFile(outputFileName);
      const modifiedFile = new Blob([modifiedFileArray], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });

      // Create a URL for the Blob and start download
      const url = URL.createObjectURL(modifiedFile);
      const a = document.createElement('a');
      a.href = url;
      a.download = outputFileName;
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
      URL.revokeObjectURL(url);

      // Clean up resources used by the workbook
      workbook.Dispose();
    }
  };

  return (
    <div style={{ textAlign: 'center', height: '300px' }}>
      <h1>Create HelloWorld.xlsx</h1>
      <button onClick={ExcelToPDF} disabled={!wasmModule}>
        Generate
      </button>
    </div>
  );
}

export default App;

Using "npm start" to run the program, and click "Generate" to download the generated Excel file.

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.