Galkon/index.html Secret

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
    <meta http-equiv="Content-Security-Policy" content="script-src 'self'">
    <title>Display ordering bug</title>
  </head>
  <body>
    <button id="screenshot-by-index" style="margin-bottom: 16px">Capture Screenshot by Display Index</button>
    <button id="screenshot-by-id" style="margin-bottom: 16px">Capture Screenshot by Display ID</button>

    <img id="preview" src="" style="display: none; max-width: 100vw; max-height: 100vh;"></img>

    <!-- You can also require other files to run in this process -->
    <script src="./renderer.js"></script>
  </body>
</html>

## main.js
// Modules to control application life and create native browser window
const { app, BrowserWindow, screen, desktopCapturer, ipcMain } = require('electron')
const path = require('node:path')

const getActiveDisplayBounds = () => {
  const cursorPoint = screen.getCursorScreenPoint()
  const display = screen.getDisplayNearestPoint(cursorPoint)
  return {
    display,
    bounds: {
      x: display.workArea.x + 1,
      y: display.workArea.y + 1,
      width: display.workArea.width - 2,
      height: display.workArea.height - 2
    }
  }
}

const getScreenshotByDisplayIndex = async () => {
  const {display, bounds} = getActiveDisplayBounds()
  const displays = screen.getAllDisplays()
  const displayIndex = displays.findIndex((disp) => disp.id === display.id)

  const thumbnailSize = {
    width: bounds.width,
    height: bounds.height
  }

  console.info('Display index:', displayIndex)
  console.info('Screen display ID by index:', displays[displayIndex].id)

  // then we get the screen sources we can capture
  const sources = await desktopCapturer.getSources({
    types: ['screen'],
    thumbnailSize: thumbnailSize
  })

  // then we get the source for the display the overlay is on
  const source = sources[displayIndex]
  console.log('Source display ID by index:', source.display_id)
  return source.thumbnail.toDataURL()
}

const getScreenshotByDisplayId = async () => {
  const {display, bounds} = getActiveDisplayBounds()

  const thumbnailSize = {
    width: bounds.width,
    height: bounds.height
  }

  // then we get the screen sources we can capture
  const sources = await desktopCapturer.getSources({
    types: ['screen'],
    thumbnailSize: thumbnailSize
  })

  // then we get the source for the display the overlay is on
  const source = sources.find(s => s.display_id == display.id)
  return source.thumbnail.toDataURL()
}

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js')
    }
  })

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  // Open the DevTools.
  // mainWindow.webContents.openDevTools()
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.whenReady().then(() => {
  createWindow()

  app.on('activate', function () {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.
ipcMain.handle('screenshotByIndex', async () => {
  return await getScreenshotByDisplayIndex()
})
ipcMain.handle('screenshotById', async () => {
  return await getScreenshotByDisplayId()
})

## package.json
{
  "name": "jumbled-swing-trouble-bw6qw",
  "productName": "jumbled-swing-trouble-bw6qw",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "Galkon",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "30.0.2"
  }
}

## preload.js
const { contextBridge, ipcRenderer}  = require('electron')

/**
 * The preload script runs before `index.html` is loaded
 * in the renderer. It has access to web APIs as well as
 * Electron's renderer process modules and some polyfilled
 * Node.js functions.
 *
 * https://www.electronjs.org/docs/latest/tutorial/sandbox
 */
window.addEventListener('DOMContentLoaded', () => {
  const replaceText = (selector, text) => {
    const element = document.getElementById(selector)
    if (element) element.innerText = text
  }

  for (const type of ['chrome', 'node', 'electron']) {
    replaceText(`${type}-version`, process.versions[type])
  }
})

contextBridge.exposeInMainWorld('screenshotByIndex', async () => {
  return ipcRenderer.invoke('screenshotByIndex')
})

contextBridge.exposeInMainWorld('screenshotById', async () => {
  return ipcRenderer.invoke('screenshotById')
})

## renderer.js
/**
 * This file is loaded via the <script> tag in the index.html file and will
 * be executed in the renderer process for that window. No Node.js APIs are
 * available in this process because `nodeIntegration` is turned off and
 * `contextIsolation` is turned on. Use the contextBridge API in `preload.js`
 * to expose Node.js functionality from the main process.
 */
const captureScreenshot = async (byId = false) => {
    const dataUrl = byId ? (await window.screenshotById()) : (await window.screenshotByIndex())
    const img = document.getElementById("preview")
    img.src = dataUrl
    img.style.display = "flex"
    return dataUrl
}

window.addEventListener('DOMContentLoaded', () => {
    const btn1 = document.getElementById('screenshot-by-index')
    btn1.onclick = () => captureScreenshot(false)

    const btn2 = document.getElementById('screenshot-by-id')
    btn2.onclick = () => captureScreenshot(true)
})
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
	<meta http-equiv="Content-Security-Policy" content="script-src 'self'">
	<title>Display ordering bug</title>
	</head>
	<body>
	<button id="screenshot-by-index" style="margin-bottom: 16px">Capture Screenshot by Display Index</button>
	<button id="screenshot-by-id" style="margin-bottom: 16px">Capture Screenshot by Display ID</button>

	<img id="preview" src="" style="display: none; max-width: 100vw; max-height: 100vh;"></img>

	<!-- You can also require other files to run in this process -->
	<script src="./renderer.js"></script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const { app, BrowserWindow, screen, desktopCapturer, ipcMain } = require('electron')
	const path = require('node:path')

	const getActiveDisplayBounds = () => {
	const cursorPoint = screen.getCursorScreenPoint()
	const display = screen.getDisplayNearestPoint(cursorPoint)
	return {
	display,
	bounds: {
	x: display.workArea.x + 1,
	y: display.workArea.y + 1,
	width: display.workArea.width - 2,
	height: display.workArea.height - 2
	}
	}
	}

	const getScreenshotByDisplayIndex = async () => {
	const {display, bounds} = getActiveDisplayBounds()
	const displays = screen.getAllDisplays()
	const displayIndex = displays.findIndex((disp) => disp.id === display.id)

	const thumbnailSize = {
	width: bounds.width,
	height: bounds.height
	}

	console.info('Display index:', displayIndex)
	console.info('Screen display ID by index:', displays[displayIndex].id)

	// then we get the screen sources we can capture
	const sources = await desktopCapturer.getSources({
	types: ['screen'],
	thumbnailSize: thumbnailSize
	})

	// then we get the source for the display the overlay is on
	const source = sources[displayIndex]
	console.log('Source display ID by index:', source.display_id)
	return source.thumbnail.toDataURL()
	}

	const getScreenshotByDisplayId = async () => {
	const {display, bounds} = getActiveDisplayBounds()

	const thumbnailSize = {
	width: bounds.width,
	height: bounds.height
	}

	// then we get the screen sources we can capture
	const sources = await desktopCapturer.getSources({
	types: ['screen'],
	thumbnailSize: thumbnailSize
	})

	// then we get the source for the display the overlay is on
	const source = sources.find(s => s.display_id == display.id)
	return source.thumbnail.toDataURL()
	}

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	webPreferences: {
	preload: path.join(__dirname, 'preload.js')
	}
	})

	// and load the index.html of the app.
	mainWindow.loadFile('index.html')

	// Open the DevTools.
	// mainWindow.webContents.openDevTools()
	}

	// This method will be called when Electron has finished
	// initialization and is ready to create browser windows.
	// Some APIs can only be used after this event occurs.
	app.whenReady().then(() => {
	createWindow()

	app.on('activate', function () {
	// On macOS it's common to re-create a window in the app when the
	// dock icon is clicked and there are no other windows open.
	if (BrowserWindow.getAllWindows().length === 0) createWindow()
	})
	})

	// Quit when all windows are closed, except on macOS. There, it's common
	// for applications and their menu bar to stay active until the user quits
	// explicitly with Cmd + Q.
	app.on('window-all-closed', function () {
	if (process.platform !== 'darwin') app.quit()
	})

	// In this file you can include the rest of your app's specific main process
	// code. You can also put them in separate files and require them here.
	ipcMain.handle('screenshotByIndex', async () => {
	return await getScreenshotByDisplayIndex()
	})
	ipcMain.handle('screenshotById', async () => {
	return await getScreenshotByDisplayId()
	})
	{
	"name": "jumbled-swing-trouble-bw6qw",
	"productName": "jumbled-swing-trouble-bw6qw",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "Galkon",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "30.0.2"
	}
	}
	const { contextBridge, ipcRenderer} = require('electron')

	/**
	* The preload script runs before `index.html` is loaded
	* in the renderer. It has access to web APIs as well as
	* Electron's renderer process modules and some polyfilled
	* Node.js functions.
	*
	* https://www.electronjs.org/docs/latest/tutorial/sandbox
	*/
	window.addEventListener('DOMContentLoaded', () => {
	const replaceText = (selector, text) => {
	const element = document.getElementById(selector)
	if (element) element.innerText = text
	}

	for (const type of ['chrome', 'node', 'electron']) {
	replaceText(`${type}-version`, process.versions[type])
	}
	})

	contextBridge.exposeInMainWorld('screenshotByIndex', async () => {
	return ipcRenderer.invoke('screenshotByIndex')
	})

	contextBridge.exposeInMainWorld('screenshotById', async () => {
	return ipcRenderer.invoke('screenshotById')
	})
	/**
	* This file is loaded via the <script> tag in the index.html file and will
	* be executed in the renderer process for that window. No Node.js APIs are
	* available in this process because `nodeIntegration` is turned off and
	* `contextIsolation` is turned on. Use the contextBridge API in `preload.js`
	* to expose Node.js functionality from the main process.
	*/
	const captureScreenshot = async (byId = false) => {
	const dataUrl = byId ? (await window.screenshotById()) : (await window.screenshotByIndex())
	const img = document.getElementById("preview")
	img.src = dataUrl
	img.style.display = "flex"
	return dataUrl
	}

	window.addEventListener('DOMContentLoaded', () => {
	const btn1 = document.getElementById('screenshot-by-index')
	btn1.onclick = () => captureScreenshot(false)

	const btn2 = document.getElementById('screenshot-by-id')
	btn2.onclick = () => captureScreenshot(true)
	})