docs.sheetjs.com/docz/docs/03-demos/02-frontend/19-bundler/03-vitejs.md

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---
title: Bundling Sheets with ViteJS
sidebar_label: ViteJS
pagination_prev: demos/index
pagination_next: demos/grid/index
sidebar_position: 3
---
import current from '/version.js';
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';
import CodeBlock from '@theme/CodeBlock';
[ViteJS](https://vitejs.dev/) is a modern build tool for generating static sites.
[SheetJS](https://sheetjs.com) is a JavaScript library for reading and writing
data from spreadsheets.
This demo uses ViteJS and SheetJS to export data. We'll explore how to add
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SheetJS to a site using ViteJS and how to export data to spreadsheets.
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:::info pass
The [Vite section of the Content demo](/docs/demos/static/vitejs) covers asset
loaders. They are ideal for static sites pulling data from sheets at build time.
:::
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:::note pass
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This demo focuses on integration details with the ViteJS bundler.
The demos follow the ["Export Tutorial"](/docs/getting-started/examples/export),
which covers SheetJS library usage in more detail.
:::
:::note Tested Deployments
This demo was tested in the following environments:
| ViteJS | Date |
|:---------|:-----------|
| `5.0.5` | 2023-12-04 |
| `4.5.0` | 2023-12-04 |
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:::
## 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 ViteJS project, `import` statements
can load relevant parts of the library.
```js
import { read, utils, writeFileXLSX } from 'xlsx';
```
:::info pass
ViteJS requires third-party libraries to provide additional `package.json`
metadata. SheetJS library version 0.18.10 added the required metadata.
It is strongly recommended to [upgrade to the latest version](/docs/getting-started/installation/frameworks)
:::
## Complete Example
1) Create a new ViteJS project:
```bash
npm create vite@latest sheetjs-vite -- --template vue-ts
cd sheetjs-vite
npm i
```
2) Add the SheetJS dependency:
<CodeBlock language="bash">{`\
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
</CodeBlock>
3) Replace `src\components\HelloWorld.vue` with:
```html title="src\components\HelloWorld.vue"
<script setup lang="ts">
import { version, utils, writeFileXLSX } from 'xlsx';
interface President {
terms: { "type": "prez" | "viceprez"; }[];
name: { first: string; last: string; }
bio: { birthday: string; }
}
async function xport() {
/* fetch JSON data and parse */
const url = "https://sheetjs.com/data/executive.json";
const raw_data: President[] = await (await fetch(url)).json();
/* filter for the Presidents */
const prez = raw_data.filter(row => row.terms.some(term => term.type === "prez"));
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/* sort by first presidential term */
prez.forEach(row => row.start = row.terms.find(term => term.type === "prez").start);
prez.sort((l,r) => l.start.localeCompare(r.start));
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/* 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");
}
</script>
<template>
<button type="button" @click="xport">Export with SheetJS version {{ version }}</button>
</template>
```
4) Start the development server:
```bash
npm run dev
```
5) Open a web browser to `http://localhost:5173/` and click the export button.
6) Build the production site:
```bash
npx vite build
```
7) Verify the new site by running a local web server in the `dist` folder:
```bash
npx http-server dist
```
8) Access the displayed URL (typically `http://localhost:8080`) in a web browser
and click the export button.