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import current from '/version.js'; import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; import CodeBlock from '@theme/CodeBlock';
RollupJS is a module bundler.
SheetJS is a JavaScript library for reading and writing data from spreadsheets.
This demo uses RollupJS and SheetJS to export data. We'll explore how to bundle SheetJS in a site using RollupJS and how to export data to spreadsheets.
:::note
This demo was last tested on 2023 October 21 against RollupJS 4.1.4
:::
Integration Details
The "Frameworks" section covers installation with Yarn and other package managers.
After installing the SheetJS module in a RollupJS project, import statements
can load relevant parts of the library:
import { read, utils, writeFileXLSX } from 'xlsx';
Required Plugin
RollupJS can support NodeJS modules using the @rollup/plugin-node-resolve
plugin. The flag --plugin @rollup/plugin-node-resolve should be passed to the
RollupJS CLI tool
npx rollup index.js --plugin @rollup/plugin-node-resolve --file bundle.js --format iife
Complete Example
- Initialize a new project:
mkdir sheetjs-rollup
cd sheetjs-rollup
npm init -y
- Install the tarball using a package manager:
- Save the following to
index.js:
// highlight-next-line
import { utils, version, writeFileXLSX } from 'xlsx';
document.getElementById("xport").addEventListener("click", async() => {
/* fetch JSON data and parse */
const url = "https://sheetjs.com/data/executive.json";
const raw_data = await (await fetch(url)).json();
/* filter for the Presidents */
const prez = raw_data.filter(row => row.terms.some(term => term.type === "prez"));
/* flatten objects */
const rows = prez.map(row => ({
name: row.name.first + " " + row.name.last,
birthday: row.bio.birthday
}));
/* generate worksheet and workbook */
const worksheet = utils.json_to_sheet(rows);
const 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 */
const max_width = rows.reduce((w, r) => 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");
});
- Bundle the script:
npx rollup index.js --plugin @rollup/plugin-node-resolve --file bundle.js --format iife
This step will create bundle.js
- Create a small HTML page that loads the script. Save to
index.html:
<!DOCTYPE html>
<html lang="en">
<head></head>
<body>
<h1>SheetJS Presidents Demo</h1>
<button id="xport">Click here to export</button>
<script type="module" src="./bundle.js"></script>
</body>
</html>
- Start a local HTTP server:
npx http-server .
Access the displayed URL (typically http://localhost:8080/) in a web browser.
Click on "Click here to export" to generate a file.