cawa-93/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'">
    <meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">
    <title>Electron Issue #29319</title>
  </head>
  <body>
    <ol>
      <li>Open browser developer tools</li>
      <li>Go to <b>Application</b> -> <b>Storage</b> </li>
      <li>Enable <b>"Simulate custom storage quota"</b>. 1MB for example.</li>
      <li>Push the data in the IndexedDB below several times to Exceeded quota</li>
      <li>Expected Behavior: Alert with <code>QuotaExceededError</code>
    </ol>


    <form>
      <label>How many Items push to IndexedDB?
        <input type="number" value="10000">
        <button>Push data to IndexedDB</button>
      </label>
    </form>

    <p id="storage-stat">
      Storage quota: <span id="quota"></span>.<br>
      Storage usage: <span id="usage"></span> (<span id="usage-percent"></span>%)
    </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} = require('electron')
const path = require('path')

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
  })

  // 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.

## preload.js
// Empty

## renderer.js
function updateStorestat() {
  return navigator.storage.estimate().then(estimate => {
    console.log({estimate})
    document.body.querySelector('#quota').textContent = estimate.quota
    document.body.querySelector('#usage').textContent = estimate.usage
    document.body.querySelector('#usage-percent').textContent = estimate.usage * 100 / estimate.quota
  })
}

updateStorestat()


document.querySelector('form').addEventListener('submit', async (event) => {
  event.preventDefault()

  pushDataToIdb(document.querySelector('input').valueAsNumber)
  .then(updateStorestat)
  .catch(e => alert(e))
})


function pushDataToIdb(arraySize = 10000) {
  const dataPlacehonder = new Array(arraySize).fill('text-data-placeholder')

  return new Promise((resolve, reject) => {
      const request = window.indexedDB.open("MyTestDatabase", 1);

      request.onerror = event => reject(event.target.error)

      request.onupgradeneeded = function(event) {
        var db = event.target.result;
        db.createObjectStore("test-data", { keyPath: "index", autoIncrement: true });
      };


      request.onsuccess = function(event) {
          db = event.target.result;

          db.onerror = event => reject(event.target.error)

          var transaction = db.transaction(["test-data"], "readwrite");

          transaction.onerror = event => reject(event.target.error)
          transaction.onabort = event => reject(event.target.error)
          transaction.oncomplete = () => resolve()

          var objectStore = transaction.objectStore("test-data");

          var request = objectStore.add(dataPlacehonder);
          request.onerror = event => reject(event.target.error)

      };
  })
}

## styles.css
/* Empty */
	<!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'">
	<meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">
	<title>Electron Issue #29319</title>
	</head>
	<body>
	<ol>
	<li>Open browser developer tools</li>
	<li>Go to <b>Application</b> -> <b>Storage</b> </li>
	<li>Enable <b>"Simulate custom storage quota"</b>. 1MB for example.</li>
	<li>Push the data in the IndexedDB below several times to Exceeded quota</li>
	<li>Expected Behavior: Alert with <code>QuotaExceededError</code>
	</ol>


	<form>
	<label>How many Items push to IndexedDB?
	<input type="number" value="10000">
	<button>Push data to IndexedDB</button>
	</label>
	</form>

	<p id="storage-stat">
	Storage quota: <span id="quota"></span>.<br>
	Storage usage: <span id="usage"></span> (<span id="usage-percent"></span>%)
	</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} = require('electron')
	const path = require('path')

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	})

	// 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.
	function updateStorestat() {
	return navigator.storage.estimate().then(estimate => {
	console.log({estimate})
	document.body.querySelector('#quota').textContent = estimate.quota
	document.body.querySelector('#usage').textContent = estimate.usage
	document.body.querySelector('#usage-percent').textContent = estimate.usage * 100 / estimate.quota
	})
	}

	updateStorestat()


	document.querySelector('form').addEventListener('submit', async (event) => {
	event.preventDefault()

	pushDataToIdb(document.querySelector('input').valueAsNumber)
	.then(updateStorestat)
	.catch(e => alert(e))
	})



	function pushDataToIdb(arraySize = 10000) {
	const dataPlacehonder = new Array(arraySize).fill('text-data-placeholder')

	return new Promise((resolve, reject) => {
	const request = window.indexedDB.open("MyTestDatabase", 1);

	request.onerror = event => reject(event.target.error)

	request.onupgradeneeded = function(event) {
	var db = event.target.result;
	db.createObjectStore("test-data", { keyPath: "index", autoIncrement: true });
	};


	request.onsuccess = function(event) {
	db = event.target.result;

	db.onerror = event => reject(event.target.error)

	var transaction = db.transaction(["test-data"], "readwrite");

	transaction.onerror = event => reject(event.target.error)
	transaction.onabort = event => reject(event.target.error)
	transaction.oncomplete = () => resolve()

	var objectStore = transaction.objectStore("test-data");

	var request = objectStore.add(dataPlacehonder);
	request.onerror = event => reject(event.target.error)

	};
	})
	}