xmedeko/index.html

## 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="default-src 'self'; script-src 'self'">
    <title>Electron fs.rmSync EPERM bug</title>
  </head>
  <body>
    <p>
      Node.js <span id="node-version"></span>
      Electron <span id="electron-version"></span>
    <p>

    <p>Electron.js fs.rmSync EPERM bug<p>
    <p>See https://github.com/electron/electron/issues/52253</p>
    <p>
      <button id="create-file-btn">Create RO file</button>&nbsp;
      <br>
      <br>
      <button id="remove-file-sync-btn">Remove RO file sync</button>
      &nbsp;&nbsp;&nbsp;
      <button id="remove-file-btn">Remove RO file</button>
      &nbsp;&nbsp;&nbsp;
      <button id="remove-file-main-sync-btn">Remove RO file in main sync</button>
      <br>
      <br>
      <textarea id="out" rows="10" cols="80"></textarea>
    <p>

    <!-- 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, ipcMain } = require('electron')
const path = require('node:path')
const fs = require('node:fs')

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

  // 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()
})

ipcMain.handle('rm-sync', async (_event, filePath) => {
  fs.rmSync(filePath)
})

## package.json
{
  "name": "glossy-vest-settle-feue2",
  "productName": "glossy-vest-settle-feue2",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "xmedeko",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "43.0.0"
  }
}

## preload.js
const { ipcRenderer } = require("electron");
const path = require('path')
const fs = require('fs')
const fsPromises = require('fs/promises')

window.addEventListener('DOMContentLoaded', () => {
  fillVersions()
  const outEl = document.getElementById('out')

  const fullPath = path.resolve('testfile.txt')
  outEl.value = `File path: ${fullPath}`

  document.getElementById('create-file-btn').addEventListener('click', () => {
    try {
      fs.writeFileSync('testfile.txt', 'AAA', { mode: 0o444 }) // read-only for all
      out.value = `File created.\n${fullPath}`
    } catch (err) {
      console.error(err)
      out.value = `Create file error.\n${fullPath}\n${err}`
    }
  })

  document.getElementById('remove-file-sync-btn').addEventListener('click', () => {
    try {
      fs.rmSync('testfile.txt')
      out.value = `File removed.\n${fullPath}`
    } catch (err) {
      console.error(err)
      out.value = `Remove file error.\n${fullPath}\n${err}`
    }
  })

  document.getElementById('remove-file-btn').addEventListener('click', async () => {
    try {
      await fsPromises.rm('testfile.txt')
      out.value = `File removed.\n${fullPath}`
    } catch (err) {
      console.error(err)
      out.value = `Remove file error.\n${fullPath}\n${err}`
    }
  })

  document.getElementById('remove-file-main-sync-btn').addEventListener('click', async () => {
    try {
      await ipcRenderer.invoke('rm-sync', fullPath)
      out.value = `File removed.\n${fullPath}`
    } catch (err) {
      console.error(err)
      out.value = `Remove file error.\n${fullPath}\n${err}`
    }
  })

})

function fillVersions() {
  const replaceText = (selector, text) => {
    const element = document.getElementById(selector)
    if (element) element.innerText = text
  }

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

## 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.
 */
	<!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="default-src 'self'; script-src 'self'">
	<title>Electron fs.rmSync EPERM bug</title>
	</head>
	<body>
	<p>
	Node.js <span id="node-version"></span>
	Electron <span id="electron-version"></span>
	<p>

	<p>Electron.js fs.rmSync EPERM bug<p>
	<p>See https://github.com/electron/electron/issues/52253</p>
	<p>
	<button id="create-file-btn">Create RO file</button>
	<br>
	<br>
	<button id="remove-file-sync-btn">Remove RO file sync</button>

	<button id="remove-file-btn">Remove RO file</button>

	<button id="remove-file-main-sync-btn">Remove RO file in main sync</button>
	<br>
	<br>
	<textarea id="out" rows="10" cols="80"></textarea>
	<p>

	<!-- 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, ipcMain } = require('electron')
	const path = require('node:path')
	const fs = require('node:fs')

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

	// 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()
	})

	ipcMain.handle('rm-sync', async (_event, filePath) => {
	fs.rmSync(filePath)
	})
	{
	"name": "glossy-vest-settle-feue2",
	"productName": "glossy-vest-settle-feue2",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "xmedeko",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "43.0.0"
	}
	}
	const { ipcRenderer } = require("electron");
	const path = require('path')
	const fs = require('fs')
	const fsPromises = require('fs/promises')

	window.addEventListener('DOMContentLoaded', () => {
	fillVersions()
	const outEl = document.getElementById('out')

	const fullPath = path.resolve('testfile.txt')
	outEl.value = `File path: ${fullPath}`

	document.getElementById('create-file-btn').addEventListener('click', () => {
	try {
	fs.writeFileSync('testfile.txt', 'AAA', { mode: 0o444 }) // read-only for all
	out.value = `File created.\n${fullPath}`
	} catch (err) {
	console.error(err)
	out.value = `Create file error.\n${fullPath}\n${err}`
	}
	})

	document.getElementById('remove-file-sync-btn').addEventListener('click', () => {
	try {
	fs.rmSync('testfile.txt')
	out.value = `File removed.\n${fullPath}`
	} catch (err) {
	console.error(err)
	out.value = `Remove file error.\n${fullPath}\n${err}`
	}
	})

	document.getElementById('remove-file-btn').addEventListener('click', async () => {
	try {
	await fsPromises.rm('testfile.txt')
	out.value = `File removed.\n${fullPath}`
	} catch (err) {
	console.error(err)
	out.value = `Remove file error.\n${fullPath}\n${err}`
	}
	})

	document.getElementById('remove-file-main-sync-btn').addEventListener('click', async () => {
	try {
	await ipcRenderer.invoke('rm-sync', fullPath)
	out.value = `File removed.\n${fullPath}`
	} catch (err) {
	console.error(err)
	out.value = `Remove file error.\n${fullPath}\n${err}`
	}
	})

	})

	function fillVersions() {
	const replaceText = (selector, text) => {
	const element = document.getElementById(selector)
	if (element) element.innerText = text
	}

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