Closing application and notifying renderer process

user_1173674 0
Viewed 6088

I have an Electron application that needs to save some data when it's closed by the user (e.g. just after the user clicked on the "Close" button).

The data is available at the renderer process, so it should be notified before the application dies.

The Electron API for Browser Window mentions a close method, but it seems this is done by the main process, not the renderer one (if I'm not mistaken).

I tried using WebContents.send from the main process to notify the renderer process, but it seems that, because the message is asynchronous, the application is closed before the renderer process has the time to actually perform the operations.

electron
3 Answers

On the Main process:

    const ipc = require('electron').ipcMain;
    let status = 0;

    mainWindow.on('close', function (e) {
    if (status == 0) {
      if (mainWindow) {
        e.preventDefault();
        mainWindow.webContents.send('app-close');
      }
    }
  })

ipc.on('closed', _ => {
  status = 1;
  mainWindow = null;
  if (process.platform !== 'darwin') {
    app.quit();
  }
})

On the renderer process:

const electron = require('electron');
const ipc = electron.ipcRenderer;

ipc.on('app-close', _ => {

        //do something here...

        ipc.send('closed');
    });
user_114892200
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