2023-10-22 05:40:02 +00:00
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---
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title: Bundling Sheets with ParcelJS
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sidebar_label: ParcelJS
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pagination_prev: demos/index
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pagination_next: demos/grid/index
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sidebar_position: 20
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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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[ParcelJS](https://parceljs.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 ParcelJS and SheetJS to export data. We'll explore how to bundle
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SheetJS in a site using ParcelJS 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 parcel `2.10.0`
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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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:::warning Parcel Bug
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Errors of the form `Could not statically evaluate fs call` stem from a Parcel
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2023-10-23 01:20:18 +00:00
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bug[^1]. Upgrade to Parcel version 1.5.0 or later.
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2023-10-22 05:40:02 +00:00
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:::
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## Complete Example
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This demo follows the [Export Example](/docs/getting-started/examples/export).
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0) Initialize a new project:
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```bash
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mkdir sheetjs-parceljs
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cd sheetjs-parceljs
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npm init -y
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```
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1) Save the following to `index.html`:
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```html title="index.html"
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<body>
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<h3>SheetJS <span id="vers"></span> export demo</h3>
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<button id="xport">Click to Export!</button>
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<!-- the script tag must be marked as `type="module"` -->
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<!-- highlight-next-line -->
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<script type="module">
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// ESM-style import from "xlsx"
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// highlight-next-line
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import { utils, version, writeFileXLSX } from 'xlsx';
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document.getElementById("vers").innerText = version;
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document.getElementById("xport").onclick = 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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</script>
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<body>
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```
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2) Install the SheetJS NodeJS module:
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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`}
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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`}
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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`}
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</CodeBlock>
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</TabItem>
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</Tabs>
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#### Development
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3) Run the ParcelJS development server:
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```bash
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npx -y parcel@2.10.0 index.html
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```
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The process will print a URL:
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```
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Server running at http://localhost:1234
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```
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4) Access the URL from the previous step (typically `http://localhost:1234`) in
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a web browser and click the "Click to Export!" button to generate a file.
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#### Production
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5) Edit `package.json` and remove the following line:
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```js title="package.json (search for this line and remove)"
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"main": "index.js"
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```
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6) Build the production site:
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```bash
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npx -y parcel@2.10.0 build index.html
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```
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The production site will be stored in the `dist` folder
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7) Start a local web server and serve the `dist` folder:
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```bash
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npx http-server dist
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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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2023-10-23 01:20:18 +00:00
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[^1]: See [Issue 523 in the Parcel issue tracker](https://github.com/parcel-bundler/parcel/pull/523#issuecomment-357486164)
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