Export JSON Data to Excel File Using JavaScript: Comprehensive Guide

Exporting JSON data to an Excel file is a common requirement in web development, especially when it comes to data visualization and reporting. This guide covers two methods to achieve this using JavaScript: JSON to CSV and XLSX library.

Method 1: Using the JSON to CSV Library

To export JSON data to a CSV file and then serve it as a downloadable Excel file, follow these steps:

Step 1: Convert JSON Data to CSV

First, you need to convert your JSON data into CSV format. A widely used library for this purpose is json2csv.

const { Parser }  require(json2csv);
const myData  [ 
  { name: John, age: 30, city: New York }, 
  { name: Jane, age: 25, city: Los Angeles }, 
  { name: Bob, age: 40, city: Chicago } 
];
const parser  new Parser();
const csv  (myData);

Step 2: Create a Download Link for CSV Data

You can trigger a file download by creating a download link. This involves properly encoding the CSV data using encodeURIComponent.

const downloadLink  (a);
  data:text/csv;charsetutf-8,   encodeURIComponent(csv);
  data.csv;
(downloadLink);
();

Alternatively, you can use the Blob API to create a file blob and trigger the download:

const blob  new Blob([csv], { type: text/csv;charsetutf-8;  });
const url  (blob);
const downloadLink  (a);
  url;
  data.csv;
(downloadLink);
();

Both methods will create a downloadable CSV file that can be opened in Excel or any other spreadsheet application.

Method 2: Using the XLSX Library in NodeJS

If you are working in a NodeJS environment, you can use the xlsx library to convert JSON data into an Excel file.

Step 1: Install the XLSX Library

To install the xlsx library, run the following command in your terminal:

npm i xlsx

Then, import the necessary libraries and create a new workbook:

const xlsx  require(xlsx);
const fs  require(fs);
let fileData  (path/to/your/json/file.json, utf8);
let rawData  (fileData);
let workbook  _new();
_append_sheet(workbook, xlsx.utils.json_to_sheet(rawData), Sheet1);
xlsx.writeFile(workbook, output.xlsx);

Conclusion

Both methods offer a reliable way to export JSON data to Excel files using JavaScript. Depending on your project requirements, you can choose the most suitable approach. The JSON to CSV method is easier to implement and works in browser environments, while the XLSX library provides more advanced features for NodeJS applications.

Related Keywords

JSON, Excel, JavaScript