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title: Bundlers
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SheetJS predates ECMAScript modules and most bundler tools. As best practices
have evolved, stress testing SheetJS libraries have revealed bugs in bundlers
and other tools. This demo collects various notes and provides basic examples.
:::note pass
Issues should be reported to the respective bundler projects. Typically it is
considered a bundler bug if the tool cannot properly handle JS libraries.
:::
The following tools are covered in separate pages:
## Dojo
Integration details are included [in the "AMD" installation](/docs/getting-started/installation/amd#dojo-toolkit)
Complete Examples are included [in the "Dojo" demo](/docs/demos/frontend/dojo)
## Snowpack
Snowpack was a development tool built by the AstroJS team.
:::caution pass
Snowpack is no longer maintained. The developers recommend [ViteJS](/docs/demos/frontend/bundler/vitejs)
:::
Snowpack works with no caveats.
Complete Example (click to show)
:::note Tested Deployments
This demo was tested in the following environments:
| Version | Date |
|:--------|:-----------|
| `3.8.8` | 2024-04-14 |
:::
0) Initialize a new project:
```bash
mkdir sheetjs-snowpack
cd sheetjs-snowpack
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 --save 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
import { utils, version, writeFileXLSX } from 'xlsx';
document.getElementById("xport").addEventListener("click", async() => {
/* fetch JSON data and parse */
const url = "https://docs.sheetjs.com/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"));
/* 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));
/* 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");
});
```
3) Create a small HTML page that loads the script. Save to `index.html`:
```html title="index.html"
SheetJS Presidents Demo
```
:::note pass
Unlike other bundlers, Snowpack requires a full page including `HEAD` element.
:::
4) Build for production:
```bash
npx snowpack@3.8.8 build
```
5) Start a local HTTP server, then go to `http://localhost:8080/`
```bash
npx http-server build/
```
Click on "Click here to export" to generate a file.
## WMR
WMR was a development tool built by the PreactJS team.
:::caution pass
WMR is no longer maintained. The developers recommend [ViteJS](/docs/demos/frontend/bundler/vitejs)
:::
WMR works with no caveats.
Complete Example (click to show)
:::note Tested Deployments
This demo was tested in the following environments:
| Version | Date |
|:--------|:-----------|
| `3.8.0` | 2024-04-14 |
:::
0) Initialize a new project:
```bash
mkdir sheetjs-wmr
cd sheetjs-wmr
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 --save 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
import { utils, version, writeFileXLSX } from 'xlsx';
document.getElementById("xport").addEventListener("click", async() => {
/* fetch JSON data and parse */
const url = "https://docs.sheetjs.com/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"));
/* 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));
/* 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");
});
```
3) Create a small HTML page that loads the script. Save to `index.html`:
```html title="index.html"
SheetJS Presidents Demo
```
4) Build for production:
```bash
npx wmr@3.8.0 build
```
5) Start a local HTTP server in `dist` folder and go to `http://localhost:8080/`
```bash
npx http-server dist/
```
Click on "Click here to export" to generate a file.
#### Browserify
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/browserify)**
#### Bun
**[The exposition has been moved to a separate page.](/docs/getting-started/installation/bun#bundling)**
#### esbuild
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/esbuild)**
#### Parcel
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/parcel)**
#### RequireJS
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/requirejs)**
#### Rollup
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/rollup)**
#### SWC
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/swcpack)**
#### SystemJS
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/systemjs)**
#### Vite
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/vitejs)**
#### Webpack
**[The exposition has been moved to a separate page.](/docs/demos/frontend/bundler/webpack)**