---
title: Bundling Sheets with Browserify
sidebar_label: Browserify
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---
import current from '/version.js';
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[Browserify](https://browserify.org/) is a module bundler.
[SheetJS](https://sheetjs.com) is a JavaScript library for reading and writing
data from spreadsheets.
This demo uses Browserify and SheetJS to export data. We'll explore how to add
SheetJS to a site using Browserify and how to export data to spreadsheets.
:::note
This demo was last tested on 2023 October 21 against Browserify `17.0.0`
:::
## Integration Details
[The "Frameworks" section](/docs/getting-started/installation/frameworks) covers
installation with Yarn and other package managers.
After installing the SheetJS module in a Browserify project, `require`
expressions can load relevant parts of the library.
```js
var XLSX = require("xlsx");
// ... use XLSX ...
```
Browserify can also process `require` expressions in Web Worker scripts.
## Complete Example
0) Initialize a new project:
```bash
mkdir sheetjs-browserify
cd sheetjs-browserify
npm init -y
```
1) Install the tarball using a package manager:
{`\
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
{`\
pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
{`\
yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
2) Save the following to `index.js`:
```js title="index.js"
// highlight-next-line
const { utils, version, writeFileXLSX } = require('xlsx');
document.getElementById("xport").addEventListener("click", function() {
/* fetch JSON data and parse */
var url = "https://sheetjs.com/data/executive.json";
fetch(url).then(function(res) { return res.json(); }).then(function(raw_data) {
/* filter for the Presidents */
var prez = raw_data.filter(function(row) { return row.terms.some(function(term) { return term.type === "prez"; }); });
/* sort by first presidential term */
prez.forEach(function(row) {
row.start = row.terms.find(function(term) {
return term.type === "prez";
}).start
});
prez.sort(function(l,r) { return l.start.localeCompare(r.start); });
/* flatten objects */
var rows = prez.map(function(row) { return {
name: row.name.first + " " + row.name.last,
birthday: row.bio.birthday
}; });
/* generate worksheet and workbook */
var worksheet = utils.json_to_sheet(rows);
var workbook = utils.book_new();
utils.book_append_sheet(workbook, worksheet, "Dates");
/* fix headers */
utils.sheet_add_aoa(worksheet, [["Name", "Birthday"]], { origin: "A1" });
/* calculate column width */
var max_width = rows.reduce(function(w, r) { return Math.max(w, r.name.length); }, 10);
worksheet["!cols"] = [ { wch: max_width } ];
/* create an XLSX file and try to save to Presidents.xlsx */
writeFileXLSX(workbook, "Presidents.xlsx");
});
});
```
3) Bundle the scripts:
```bash
npx browserify app.js > browserify.js
```
4) Spin up a local web server:
```bash
npx http-server
```
5) Create a small HTML page that loads the script. Save to `index.html`:
```html title="index.html"
SheetJS Presidents Demo
```
6) Start a local HTTP server and go to `http://localhost:8080/`
```bash
npx http-server .
```
Click on "Click here to export" to generate a file.