jamiebuilds/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>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using Node.js <span id="node-version"></span>,
    Chromium <span id="chrome-version"></span>,
    and Electron <span id="electron-version"></span>.

    <!-- 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, dialog, BrowserWindow } = require('electron')
const path = require('path')
const fs = require('fs/promises')
const pathCompleteExtname = require('path-complete-extname')


async 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()

  const defaultPath = "file.html.md"
  const defaultExt = pathCompleteExtname(defaultPath)
  const defaultBase = path.basename(defaultPath, defaultExt)

  console.log({ defaultExt, defaultBase })
  const extension = defaultExt.replace(/^\./, "")

  const { canceled, filePath: selectedFilePath } = await dialog.showSaveDialog({
    defaultPath: defaultBase,
    filters: [{ name: `${defaultExt}`, extensions: [extension] }]
  })

  if (canceled) {
    return
  }

  const finalDirname = path.dirname(selectedFilePath)
  const finalBasename = path.basename(selectedFilePath, defaultExt)
  const selectedExtname = pathCompleteExtname(selectedFilePath)
  const finalExtname = selectedExtname === "" ? defaultExt : selectedExtname
  const finalFilePath = path.join(finalDirname, finalBasename + finalExtname)

  console.log({
    selectedFilePath,
    defaultExt,
    finalDirname,
    finalBasename,
    selectedExtname,
    finalExtname,
  })

  await fs.writeFile(finalFilePath, `updated: ${new Date().toISOString()}`)
}

// 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(async () => {
  await createWindow()

  app.on('activate', async 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) {
      await 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.

## package.json
{
  "name": "dangerous-hill-rain-7reyd",
  "productName": "dangerous-hill-rain-7reyd",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "Jamie",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {
    "path-complete-extname": "1.0.0"
  },
  "devDependencies": {
    "electron": "25.0.1"
  }
}

## preload.js
/**
 * The preload script runs before. 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])
  }
})

## 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>Hello World!</title>
	</head>
	<body>
	<h1>Hello World!</h1>
	We are using Node.js <span id="node-version"></span>,
	Chromium <span id="chrome-version"></span>,
	and Electron <span id="electron-version"></span>.

	<!-- 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, dialog, BrowserWindow } = require('electron')
	const path = require('path')
	const fs = require('fs/promises')
	const pathCompleteExtname = require('path-complete-extname')


	async 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()

	const defaultPath = "file.html.md"
	const defaultExt = pathCompleteExtname(defaultPath)
	const defaultBase = path.basename(defaultPath, defaultExt)

	console.log({ defaultExt, defaultBase })
	const extension = defaultExt.replace(/^\./, "")

	const { canceled, filePath: selectedFilePath } = await dialog.showSaveDialog({
	defaultPath: defaultBase,
	filters: [{ name: `${defaultExt}`, extensions: [extension] }]
	})

	if (canceled) {
	return
	}

	const finalDirname = path.dirname(selectedFilePath)
	const finalBasename = path.basename(selectedFilePath, defaultExt)
	const selectedExtname = pathCompleteExtname(selectedFilePath)
	const finalExtname = selectedExtname === "" ? defaultExt : selectedExtname
	const finalFilePath = path.join(finalDirname, finalBasename + finalExtname)

	console.log({
	selectedFilePath,
	defaultExt,
	finalDirname,
	finalBasename,
	selectedExtname,
	finalExtname,
	})

	await fs.writeFile(finalFilePath, `updated: ${new Date().toISOString()}`)
	}

	// 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(async () => {
	await createWindow()

	app.on('activate', async 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) {
	await 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.
	{
	"name": "dangerous-hill-rain-7reyd",
	"productName": "dangerous-hill-rain-7reyd",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "Jamie",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {
	"path-complete-extname": "1.0.0"
	},
	"devDependencies": {
	"electron": "25.0.1"
	}
	}
	/**
	* The preload script runs before. 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])
	}
	})
	/**
	* 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.
	*/