sheetjs/docs.sheetjs.com
1
Fork 4
Code Issues Pull Requests 1 Projects Releases Wiki Activity

neu

Browse Source
This commit is contained in:
SheetJS 2022-09-02 01:52:23 -04:00
parent 28b752eafc
commit ca17e104e0
5 changed files with 252 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.spelling
View File

@ -185,6 +185,7 @@ Nashorn
NativeScript
NestJS
NetSuite
NeutralinoJS
NextJS
NoSQL
NodeJS

238
docz/docs/03-demos/03-desktop.md
View File

@ -534,7 +534,7 @@ const filters = [
// ... other desired formats ...
];
async function saveFile() {
async function saveFile(wb) {
/* show save file dialog */
const selected = await save({
title: "Save to Spreadsheet",
@ -761,3 +761,239 @@ async function exportFile(wb) {
// The demo shows a success message at this point
}
```
## NeutralinoJS
The [Standalone build](../getting-started/installation/standalone) can be added
to the entry `index.html`
This demo was tested against "binaries" `4.7.0` and "client" `3.6.0`
:::note
NeutralinoJS currently does not provide the equivalent of NodeJS `fs` module.
The raw `Neutralino.filesystem` and `Neutralino.os` methods are used.
:::
The `os` and `filesystem` modules must be enabled in `neutralino.conf.json`.
The starter already enables `os` so typically one line must be added:
```json title="neutralino.config.json"
"nativeAllowList": [
"app.*",
"os.*",
// highlight-next-line
"filesystem.*",
"debug.log"
],
```
The "Complete Example" creates an app that looks like the screenshot:
![SheetJS NeutralinoJS MacOS screenshot](pathname:///neu/macos.png)
:::caution
At the time of writing, `filters` did not work as expected on MacOS. They have
been omitted in the example and commented in the code snippets
:::
<details><summary><b>Complete Example</b> (click to show)</summary>
The app core state will be the HTML table. Reading files will add the table to
the window. Writing files will parse the table into a spreadsheet.
1) Create a new NeutralinoJS app:
```bash
npx @neutralinojs/neu create sheetjs-neu
cd sheetjs-neu
```
2) Download the standalone script and place in `resources/js/main.js`:
```bash
curl -L -o resources/js/xlsx.full.min.js https://cdn.sheetjs.com/xlsx-latest/package/dist/xlsx.full.min.js
```
3) Add the highlighted lines to `neutralino.conf.json` in `nativeAllowList`:
```json title="neutralino.config.json"
"nativeAllowList": [
"app.*",
// highlight-start
"os.*",
"filesystem.*",
// highlight-end
"debug.log"
],
```
4) Set up skeleton app and print version info:
- Edit `resources/index.html` and replace the `<body>` with the code below:
```html title="resources/index.html"
<body>
<div id="neutralinoapp">
<h1>SheetJS × NeutralinoJS</h1>
<button onclick="importData()">Import Data</button>
<button onclick="exportData()">Export Data</button>
<div id="info"></div>
</div>
<script src="js/neutralino.js"></script>
<!-- Load the browser build and make XLSX available to main.js -->
<script src="js/xlsx.full.min.js"></script>
<script src="js/main.js"></script>
</body>
```
- Append the following code to `resources/styles.css` to center the table:
```css title="resources/styles.css"
#info {
width:100%;
text-align: unset;
}
table {
margin: 0 auto;
}
```
- Print the version number in the `showInfo` method of `resources/js/main.js`:
```js title="resources/js/main.js"
${NL_APPID} is running on port ${NL_PORT} inside ${NL_OS}
<br/><br/>
<span>server: v${NL_VERSION} . client: v${NL_CVERSION}</span>
// highlight-start
<br/><br/>
<span>SheetJS version ${XLSX.version}</span>
// highlight-end
`;
```
5) Run the app:
```bash
npx @neutralinojs/neu run
```
You should see `SheetJS Version ` followed by the library version number.
6) Add the following code to the bottom of `resources/js/main.js`:
```js
(async() => {
const ab = await (await fetch("https://sheetjs.com/pres.numbers")).arrayBuffer();
const wb = XLSX.read(ab);
const ws = wb.Sheets[wb.SheetNames[0]];
document.getElementById('info').innerHTML = XLSX.utils.sheet_to_html(ws);
})();
```
Save the source file, close the app and re-run the command from step 5.
When the app loads, a table should show in the main screen.
7) Add `importFile` and `exportFile` to the bottom of `resources/js/main.js`:
```js
async function importData() {
/* show open dialog */
const [filename] = await Neutralino.os.showOpenDialog('Open a spreadsheet');
/* read data */
const ab = await Neutralino.filesystem.readBinaryFile(filename);
const wb = XLSX.read(ab);
/* make table */
const ws = wb.Sheets[wb.SheetNames[0]];
document.getElementById('info').innerHTML = XLSX.utils.sheet_to_html(ws);
}
async function exportData() {
/* show save dialog */
const filename = await Neutralino.os.showSaveDialog('Save to file');
/* make workbook */
const tbl = document.getElementById('info').querySelector("table");
const wb = XLSX.utils.table_to_book(tbl);
/* make file */
const bookType = filename.slice(filename.lastIndexOf(".") + 1);
const data = XLSX.write(wb, { bookType, type: "buffer" });
await Neutralino.filesystem.writeBinaryFile(filename, data);
}
```
Save the source file, close the app and re-run the command from step 5.
When the app loads, click the "Import File" button and select a spreadsheet to
see the contents. Click "Export File" and enter `SheetJSNeu.xlsx` to write.
8) Build production apps:
```bash
npx @neutralinojs/neu run
```
Platform-specific programs will be created in the `dist` folder.
</details>
### Reading Files
There are two steps to reading files: obtaining a path and reading binary data:
```js
const filters = [
{name: "Excel Binary Workbook", extensions: ["xlsb"]},
{name: "Excel Workbook", extensions: ["xlsx"]},
]
async function openFile() {
/* show open file dialog */
const [filename] = await Neutralino.os.showOpenDialog(
'Open a spreadsheet',
{ /* filters, */ multiSelections: false }
);
/* read data into an ArrayBuffer */
const ab = await Neutralino.filesystem.readBinaryFile(filename);
/* parse with SheetJS */
const wb = XLSX.read(ab);
return wb;
}
```
This method can be called from a button click or other event.
### Writing Files
There are two steps to writing files: obtaining a path and writing binary data:
```js
const filters = [
{name: "Excel Binary Workbook", extensions: ["xlsb"]},
{name: "Excel Workbook", extensions: ["xlsx"]},
]
async function saveFile(wb) {
/* show save file dialog */
const filename = await Neutralino.os.showSaveDialog(
'Save to file',
{ /* filters */ }
);
/* Generate workbook */
const bookType = filename.slice(filename.lastIndexOf(".") + 1);
const data = XLSX.write(wb, { bookType, type: "buffer" });
/* save data to file */
await Neutralino.filesystem.writeBinaryFile(filename, data);
}
```

8
docz/docs/03-demos/33-localfile.md
View File

@ -339,6 +339,14 @@ const wb = XLSX.readFile("sheetjs.numbers");
XLSX.writeFile(wb, "sheetjs.xlsx");
```
:::note
Any script using `XLSX.readFile` requires the `--allow-read` permission.
Any script using `XLSX.writeFile` requires the `--allow-write` permission.
:::
### Bun
Bun requires the `fs` module:

12
docz/docs/03-demos/45-git.md
View File

@ -162,7 +162,7 @@ the source data or artifacts from the `postprocess` script changed.
### Post-Processing Data
:::caution
:::warning
The `flat-postprocessing` library includes a number of utilities for different
data formats. The `readXLSX` helper uses SheetJS under the hood.
@ -175,17 +175,17 @@ releases, the examples import from the SheetJS CDN:
import * as XLSX from 'https://cdn.sheetjs.com/xlsx-latest/package/xlsx.mjs';
```
The official registry endpoint <https://deno.land/x/sheetjs> is out of date.
[This is a known registry bug](https://github.com/denoland/dotland/issues/2072)
:::
#### Post-Process Script
The first argument to the post-processing script is the filename. The file can
be read with `XLSX.readFile` directly. On the export side, `writeCSV` from the
`flat` library can write data generated from `XLSX.utils.sheet_to_csv`:
be read with `XLSX.readFile` directly. `XLSX.utils.sheet_to_csv` generates CSV:
```ts title="postprocess.ts"
import { writeCSV } from "https://deno.land/x/flat/mod.ts";
// @deno-types="https://cdn.sheetjs.com/xlsx-latest/package/types/index.d.ts"
import * as XLSX from 'https://cdn.sheetjs.com/xlsx-latest/package/xlsx.mjs';
/* load the codepage support library for extended support with older formats */
import * as cptable from 'https://cdn.sheetjs.com/xlsx-latest/package/dist/cpexcel.full.mjs';
@ -206,7 +206,7 @@ const csv = XLSX.utils.sheet_to_csv(first_sheet);
/* write CSV */
// highlight-next-line
await writeCSV(out_file, csv);
Deno.writeFileSync(out_file, new TextEncoder().encode(csv));
```

BIN
docz/static/neu/macos.png Normal file
View File

Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 98 KiB