vite-sheet
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---
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title: ViteJS
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sidebar_class_name: red
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sidebar_label: ViteJS
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description: Make static websites from spreadsheets using ViteJS. Seamlessly integrate data into your website using SheetJS. Empower non-technical people to write content from Excel.
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pagination_prev: demos/net/index
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pagination_next: demos/mobile/index
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sidebar_custom_props:
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type: bundler
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---
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# ViteJS Spreadsheet Plugins
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import current from '/version.js';
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import CodeBlock from '@theme/CodeBlock';
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[ViteJS](https://vitejs.dev/) is a modern build tool for generating static sites.
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It has a robust JavaScript-powered plugin system[^1]
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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 ViteJS and SheetJS to pull data from a spreadsheet and display
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the content in an HTML table. We'll explore how to load SheetJS in a ViteJS
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plugin and compare a few different data loading strategies.
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The ["Complete Demo"](#complete-demo) section includes a complete website powered
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by an XLSX spreadsheet.
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:::note
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This demo covers static asset imports. For processing files in the browser, the
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@ -16,25 +34,21 @@ This demo covers static asset imports. For processing files in the browser, the
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:::
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## Loaders
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## Plugins
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ViteJS supports static asset imports, but the default raw loader interprets data
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ViteJS supports static asset imports[^2], but the default raw loader interprets data
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as UTF-8 strings. This corrupts binary formats like XLSX and XLS, but a custom
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loader can override the default behavior.
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:::note Recommendation
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For simple tables of data, ["Pure Data Loader"](#pure-data-loader) is strongly
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For simple tables of data, ["Pure Data Plugin"](#pure-data-plugin) is strongly
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recommended. The heavy work is performed at build time and the generated site
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only includes the raw data.
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For more complex parsing or display logic, ["Base64 Loader"](#base64-loader) is
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For more complex parsing or display logic, ["Base64 Plugin"](#base64-plugin) is
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preferable. Since the raw parsing logic is performed in the page, the library
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will be included in the final bundle.
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:::
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### Pure Data Loader
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### Pure Data Plugin
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For a pure static site, a plugin can load data into an array of row objects. The
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SheetJS work is performed in the plugin. The library is not loaded in the page!
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@ -54,6 +68,8 @@ flowchart LR
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aoo --> |main.js\nfrontend code| html
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```
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This ViteJS plugin will read spreadsheets using the SheetJS `read` method[^3]
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and generate arrays of row objects with `sheet_to_json`[^4]:
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```js title="vite.config.js"
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import { readFileSync } from 'fs';
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@ -77,19 +93,20 @@ export default defineConfig({
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});
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```
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This loader uses the query `sheetjs`:
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In frontend code, the loader will look for all modules with a `?sheetjs`
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query string. The default export is an array of row objects:
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```js title="main.js"
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import data from './data.xlsx?sheetjs';
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document.querySelector('#app').innerHTML = `<div><pre>
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${data.map(row => JSON.stringify(row)).join("\n")}
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${data.map(row => JSON.stringify(row)).join("\n")}
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</pre></div>`;
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```
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### Base64 Loader
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### Base64 Plugin
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This loader pulls in data as a Base64 string that can be read with `XLSX.read`.
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This plugin pulls in data as a Base64 string that can be read with `read`[^5].
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While this approach works, it is not recommended since it loads the library in
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the front-end site.
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@ -108,6 +125,9 @@ flowchart LR
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aoo --> |main.js\nfrontend code| html
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```
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This ViteJS plugin will read spreadsheet files and export the data as a Base64
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string. SheetJS is not imported in the plugin:
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```js title="vite.config.js"
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import { readFileSync } from 'fs';
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import { defineConfig } from 'vite';
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@ -130,7 +150,7 @@ export default defineConfig({
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```
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When importing using the `b64` query, the raw Base64 string will be exposed.
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This can be read directly with `XLSX.read` in JS code:
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`read` will process the Base64 string using the `base64` input type[^6]:
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```js title="main.js"
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import { read, utils } from "xlsx";
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@ -138,7 +158,7 @@ import { read, utils } from "xlsx";
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/* reference workbook */
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import b64 from './data.xlsx?b64';
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/* parse workbook and export first sheet to CSV */
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const wb = read(b64);
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const wb = read(b64, { type: "base64" });
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const wsname = wb.SheetNames[0];
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const csv = utils.sheet_to_csv(wb.Sheets[wsname]);
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@ -152,10 +172,13 @@ ${csv}
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:::note
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This demo was tested on 2023 May 24 against `vite v4.3.8`.
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This demo was tested on 2023 June 06 against `vite v4.3.9`.
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:::
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The demo walks through the process of creating a new ViteJS website from scratch.
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A Git repository with the completed site can be cloned[^7].
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### Initial Setup
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1) Create a new site with the `vue-ts` template and install the SheetJS package:
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@ -261,6 +284,13 @@ JSON.parse('[{"Name":"Bill Clinton","Index":42}
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Searching for `BESSELJ` should reveal no results. The SheetJS scripts are not
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included in the final site!
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:::note
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ViteJS also supports "Server-Side Rendering". In SSR, only the HTML table
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would be added to the final page. Details are covered in the ViteJS docs[^8].
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:::
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### Base64 Test
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8) Run the dev server:
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@ -316,3 +346,13 @@ Searching for `BESSELJ` should match the code:
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```
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The SheetJS library is embedded in the final site.
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[^1]: See ["Using Plugins"](https://vitejs.dev/guide/using-plugins.html) in the ViteJS documentation.
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[^2]: See ["Static Asset Handling"](https://vitejs.dev/guide/assets.html) in the ViteJS documentation.
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[^3]: See [`sheet_to_json` in "Utilities"](/docs/api/utilities/#array-output)
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[^4]: See [`read` in "Parsing Options"](/docs/api/parse-options)
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[^5]: See [`read` in "Parsing Options"](/docs/api/parse-options)
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[^6]: See [the "base64" type in "Parsing Options"](/docs/api/parse-options#input-type)
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[^7]: See [`SheetJS/sheetjs-vite`](https://git.sheetjs.com/sheetjs/sheetjs-vite/) on the SheetJS git server.
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[^8]: See ["Server-Side Rendering"](https://vitejs.dev/guide/ssr.html) in the ViteJS documentation.
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@ -38,13 +38,8 @@ remove the field is to use a `projection` to suppress the ID:
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```js
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/* generate an array of objects from a collection */
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const aoo = await collection.find({}, {projection:{_id:0}}).toArray();
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```
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Worksheets can be generated from the result using `json_to_sheet`:
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```js
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/* generate a worksheet from a collection */
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const aoo = await collection.find({}, {projection:{_id:0}}).toArray();
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const ws = utils.json_to_sheet(aoo);
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```
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@ -83,7 +83,7 @@ const config = {
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position: 'right',
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},
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{
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href: 'https://git.sheetjs.com/sheetjs/sheetjs',
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href: 'https://git.sheetjs.com/sheetjs/sheetjs/issues',
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label: 'Source',
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position: 'right',
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},
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