147 lines
3.9 KiB
Markdown
147 lines
3.9 KiB
Markdown
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---
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title: Bundling Sheets with RollupJS
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sidebar_label: RollupJS
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pagination_prev: demos/index
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pagination_next: demos/grid/index
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sidebar_position: 14
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---
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import current from '/version.js';
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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import CodeBlock from '@theme/CodeBlock';
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[RollupJS](https://rollupjs.org/) is a module bundler.
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[SheetJS](https://sheetjs.com) is a JavaScript library for reading and writing
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data from spreadsheets.
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This demo uses RollupJS and SheetJS to export data. We'll explore how to bundle
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SheetJS in a site using RollupJS and how to export data to spreadsheets.
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:::note
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This demo was last tested on 2023 October 21 against RollupJS 4.1.4
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:::
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## Integration Details
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[The "Frameworks" section](/docs/getting-started/installation/frameworks) covers
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installation with Yarn and other package managers.
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After installing the SheetJS module in a RollupJS project, `import` statements
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can load relevant parts of the library:
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```js
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import { read, utils, writeFileXLSX } from 'xlsx';
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```
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#### Required Plugin
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RollupJS can support NodeJS modules using the `@rollup/plugin-node-resolve`
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plugin. The flag `--plugin @rollup/plugin-node-resolve` should be passed to the
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RollupJS CLI tool
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```bash
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npx rollup index.js --plugin @rollup/plugin-node-resolve --file bundle.js --format iife
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```
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## Complete Example
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0) Initialize a new project:
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```bash
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mkdir sheetjs-rollup
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cd sheetjs-rollup
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npm init -y
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```
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1) Install the tarball using a package manager:
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<Tabs groupId="pm">
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<TabItem value="npm" label="npm">
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<CodeBlock language="bash">{`\
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npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@4.1.4 @rollup/plugin-node-resolve
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</CodeBlock>
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</TabItem>
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<TabItem value="pnpm" label="pnpm">
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<CodeBlock language="bash">{`\
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pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@4.1.4 @rollup/plugin-node-resolve
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</CodeBlock>
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</TabItem>
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<TabItem value="yarn" label="Yarn" default>
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<CodeBlock language="bash">{`\
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yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@4.1.4 @rollup/plugin-node-resolve
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</CodeBlock>
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</TabItem>
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</Tabs>
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2) Save the following to `index.js`:
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```js title="index.js"
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// highlight-next-line
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import { utils, version, writeFileXLSX } from 'xlsx';
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document.getElementById("xport").addEventListener("click", async() => {
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/* fetch JSON data and parse */
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const url = "https://sheetjs.com/data/executive.json";
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const raw_data = await (await fetch(url)).json();
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/* filter for the Presidents */
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const prez = raw_data.filter(row => row.terms.some(term => term.type === "prez"));
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/* flatten objects */
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const rows = prez.map(row => ({
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name: row.name.first + " " + row.name.last,
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birthday: row.bio.birthday
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}));
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/* generate worksheet and workbook */
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const worksheet = utils.json_to_sheet(rows);
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const workbook = utils.book_new();
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utils.book_append_sheet(workbook, worksheet, "Dates");
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/* fix headers */
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utils.sheet_add_aoa(worksheet, [["Name", "Birthday"]], { origin: "A1" });
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/* calculate column width */
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const max_width = rows.reduce((w, r) => Math.max(w, r.name.length), 10);
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worksheet["!cols"] = [ { wch: max_width } ];
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/* create an XLSX file and try to save to Presidents.xlsx */
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writeFileXLSX(workbook, "Presidents.xlsx");
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});
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```
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3) Bundle the script:
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```bash
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npx rollup index.js --plugin @rollup/plugin-node-resolve --file bundle.js --format iife
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```
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This step will create `bundle.js`
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4) Create a small HTML page that loads the script. Save to `index.html`:
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```html title="index.html"
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<!DOCTYPE html>
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<html lang="en">
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<head></head>
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<body>
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<h1>SheetJS Presidents Demo</h1>
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<button id="xport">Click here to export</button>
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<script type="module" src="./bundle.js"></script>
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</body>
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</html>
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```
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5) Start a local HTTP server:
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```bash
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npx http-server .
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```
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Access the displayed URL (typically `http://localhost:8080/`) in a web browser.
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Click on "Click here to export" to generate a file.
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