sheetjs_sheetjs/demos/electron/README.md

Electron

This library is compatible with Electron and should just work out of the box. The demonstration uses Electron 18.2.0. The library is added via require from the renderer process.

The library can also be required from the main process, as shown in this demo to render a version string in the About dialog on OSX.

The standard HTML5 FileReader techniques from the browser apply to Electron. This demo includes a drag-and-drop box as well as a file input box, mirroring the SheetJS Data Preview Live Demo

The core data in this demo is an editable HTML table. The readers build up the table using sheet_to_html (with editable:true option) and the writers scrape the table using table_to_book.

The demo project is structured for electron-forge:

• npm start will start the app.
• npm run make will build a standalone app.

The standalone app was tested on an Intel Mac (darwin-x64).

Reading and Writing Files

Since electron provides an fs implementation, readFile and writeFile can be used in conjunction with the standard dialog windows. For example:

/* from app code, require('electron').remote calls back to main process */
var dialog = require('electron').remote.dialog;

/* show a file-open dialog and read the first selected file */
var o = dialog.showOpenDialog({ properties: ['openFile'] });
var workbook = XLSX.readFile(o[0]);

/* show a file-save dialog and write the workbook */
var o = dialog.showSaveDialog();
XLSX.writeFile(workbook, o);

Breaking Changes in Electron

The first version of this demo used Electron 1.7.5.

Electron 9.0.0 and later require the preference nodeIntegration: true in order to require('XLSX') in the renderer process.

Electron 12.0.0 and later also require worldSafeExecuteJavascript: true and contextIsolation: true.

Electron 14+ must use @electron/remote instead of remote.