Trying To Send Data From One Electron Window To Another Via Ipc

Building my first electron app and I'd like the workflow to be as follows: mainWindow opens -> user clicks 'open' button -> 2nd window opens -> user enters input/hits sub

Solution 1:

Your call order is not right when sending input back to renderer.js. You call

win.webContents.send('input-received', data)

when index.html is not yet re-loaded into win!

To fix this you should swap the calls and make sure that the content is ready when you send ipc message

ipcMain.on('input-broadcast', (evt, data) => {
    console.log('input-broadcast happened in main')
    win.loadURL(url.format({
        pathname: path.join(__dirname, 'index.html'),
        protocol: 'file:',
        slashes: true
    }))
    win.webContents.once('dom-ready', () => {
        win.webContents.send('input-received', data)
    })
})