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import current from '/version.js'; import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; import CodeBlock from '@theme/CodeBlock'; import {useCurrentSidebarCategory} from '@docusaurus/theme-common';

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:

{item.label}{item.customProps?.summary && (" - " + item.customProps.summary)}

Browserify

browserify is compatible with the library and should "just work" with the require form in a main page or in a web worker:

var XLSX = require("xlsx");
// ... use XLSX ...

After installing the NodeJS module, bundling is straightforward:

browserify app.js > browserify.js
uglifyjs browserify.js > browserify.min.js

Web Worker scripts can be bundled using the same approach.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against Browserify 17.0.0

:::

Install the tarball using a package manager:

{`\ npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} {`\ pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} {`\ yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}

Download the following files:

curl -LO https://docs.sheetjs.com/browserify/app.js
curl -LO https://docs.sheetjs.com/browserify/index.html
curl -LO https://docs.sheetjs.com/browserify/xlsxworker.js

Bundle the scripts:

npx browserify app.js > browserify.js
npx browserify xlsxworker.js > worker.js

Spin up a local web server:

npx http-server

Access the site http://localhost:8080/ and use the file input element to select a spreadsheet.

Bun

bun bun is capable of optimizing imported libraries in node_modules. In local testing, a bundled script can save tens of milliseconds per run.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against Bun 0.5.9

:::

Install the tarball using a package manager:

Save the following script to bun.js:

// highlight-next-line
import * as XLSX from 'xlsx';
// highlight-next-line
import * as fs from 'fs';
// highlight-next-line
XLSX.set_fs(fs);

/* 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 = XLSX.utils.json_to_sheet(rows);
const workbook = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(workbook, worksheet, "Dates");

/* fix headers */
XLSX.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 */
XLSX.writeFile(workbook, "Presidents.xlsx");

Bundle the script with bun bun:

bun bun bun.js

This procedure will generate node_modules.bun.

Run the script

bun bun.js

Dojo

Integration details are included in the "AMD" installation

Complete Examples are included in the "Dojo" demo

esbuild

The xlsx.mjs source file uses a subset of ES6 that esbuild understands and is able to transpile for older browsers.

Both the node and browser platforms work out of the box.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against esbuild 0.17.18

:::

Install the tarball using a package manager:

Save the following to esbrowser.js:

// highlight-next-line
import { utils, version, writeFileXLSX } from 'xlsx';

(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");
})();

Create a small HTML page that loads the script. Save to index.html:

<body><script src="esb.browser.js"></script></body>

Create bundle:

npx esbuild@0.17.18 esbrowser.js --bundle --outfile=esb.browser.js

Start a local HTTP server, then go to http://localhost:8080/

npx http-server .

Install the tarball using a package manager:

Save the following to esbnode.js:

// highlight-next-line
import { set_fs, utils, version, writeFile } from 'xlsx';
// highlight-next-line
import * as fs from 'fs';
// highlight-next-line
set_fs(fs);

(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 */
writeFile(workbook, "Presidents.xlsx");
})();

Create bundle:

npx esbuild@0.17.18 esbnode.js --bundle --platform=node --outfile=esb.node.js

Run the bundle:

node esb.node.js

:::note pass

Bundling raw data is supported using the binary loader. For more advanced content workflows, ViteJS is the recommended tool.

:::

Parcel

Parcel should play nice with SheetJS out of the box.

:::warning Parcel Bug

Errors of the form Could not statically evaluate fs call stem from a Parcel bug. Upgrade to Parcel version 1.5.0 or later.

:::

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against parcel 2.8.3

:::

This demo follows the Presidents Example.

Save the following to index.html:

<body>
<h3>SheetJS <span id="vers"></span> export demo</h3>
<button id="xport">Click to Export!</button>
<!-- the script tag must be marked as `type="module"` -->
<!-- highlight-next-line -->
<script type="module">
// ESM-style import from "xlsx"
// highlight-next-line
import { utils, version, writeFileXLSX } from 'xlsx';

document.getElementById("vers").innerText = version;
document.getElementById("xport").onclick = 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");
};
</script>
<body>

Install the SheetJS node module:

Run the Parcel CLI tool:

npx -y parcel@2.8.3 index.html

Access the page listed in the output (typically http://localhost:1234) and click the "Click to Export!" button to generate a file.

RequireJS

The exposition has been moved to a separate page.

Rollup

Rollup requires @rollup/plugin-node-resolve to support NodeJS modules:

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against Rollup 3.21.5

:::

Install the tarball using a package manager:

{`\ npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@3.21.5 @rollup/plugin-node-resolve {`\ pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@3.21.5 @rollup/plugin-node-resolve {`\ yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} rollup@3.21.5 @rollup/plugin-node-resolve

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

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, then go to http://localhost:8080/

npx http-server .

Click on "Click here to export" to generate a file.

Snowpack

Snowpack works with no caveats.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against Snowpack 3.8.8

:::

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");
});

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="./index.js"></script>
  </body>
</html>

:::note pass

Unlike other bundlers, Snowpack requires a full page including HEAD element.

:::

Build for production:

npx snowpack@3.8.8 build

Start a local HTTP server, then go to http://localhost:8080/

npx http-server build/

Click on "Click here to export" to generate a file.

SWC

SWC provides spack for bundling scripts.

:::warning pass

When this demo was last tested, there was a bug affecting 1.2.247 and 1.3 . It is strongly recommended to use @swc/core@1.2.245 until the bug is fixed.

:::

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against SWC 1.2.246

:::

Install the dependencies using a package manager:

{`\ npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} regenerator-runtime @swc/cli @swc/core@1.2.246 {`\ pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} regenerator-runtime @swc/cli @swc/core@1.2.246 {`\ yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`} regenerator-runtime @swc/cli @swc/core@1.2.246

:::note pass

The regenerator-runtime dependency is used for transpiling fetch and is not required if the interface code does not use fetch or Promises.

:::

Save the following to index.js:

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");
});

Create an spack.config.js config file:

const { config } = require('@swc/core/spack');

module.exports = ({
  entry: {
    'web': __dirname + '/index.js',
  },
  output: {
    path: __dirname + '/lib'
  },
  module: {},
});

Build for production:

npx spack

This command will create the script lib/web.js

Create a small HTML page that loads the generated script:

<!DOCTYPE html>
<html lang="en">
  <head></head>
  <body>
    <h1>SheetJS Presidents Demo</h1>
    <button id="xport">Click here to export</button>
    <script src="lib/web.js"></script>
  </body>
</html>

Start a local HTTP server, then go to http://localhost:8080/

npx http-server

Click on "Click here to export" to generate a file.

SystemJS

The exposition has been moved to a separate page.

Vite

ViteJS is compatible with SheetJS versions starting from 0.18.10.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against ViteJS 4.3.5

:::

Create a new ViteJS project:

npm create vite@latest sheetjs-vite -- --template vue-ts
cd sheetjs-vite
npm i

Add the SheetJS dependency:

{\ npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz}

Replace src\components\HelloWorld.vue with:

<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"));

/* 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>

Run npm run dev and test functionality by opening a web browser to http://localhost:5173/ and clicking the button
Run npx vite build and verify the generated pages work by running a local web server in the dist folder:

npx http-server dist/

Access http://localhost:8080 in your web browser and click the export button.

:::note pass

The Vite section of the Content demo covers asset loaders. They are ideal for static sites pulling data from sheets at build time.

:::

Webpack

The exposition has been moved to a separate page.

WMR

WMR works with no caveats.

Complete Example (click to show)

:::note

This demo was last tested on 2023 May 07 against WMR 3.8.0

:::

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");
});

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="./index.js"></script>
  </body>
</html>

Build for production:

npx wmr@3.8.0 build

Start a local HTTP server in dist folder and go to http://localhost:8080/

npx http-server dist/

Click on "Click here to export" to generate a file.

26 KiB Raw Blame History

Browserify

Bun

Dojo

esbuild

Parcel

RequireJS

Rollup

Snowpack

SWC

SystemJS

Vite

Webpack

WMR

26 KiB

Raw Blame History