chore: type check JS in docs (#38600)

docs/api/app.md

@@ -960,7 +960,7 @@ app.setJumpList([
         title: 'Tool A',
         program: process.execPath,
         args: '--run-tool-a',
-        icon: process.execPath,
+        iconPath: process.execPath,
         iconIndex: 0,
         description: 'Runs Tool A'
       },
@@ -969,7 +969,7 @@ app.setJumpList([
         title: 'Tool B',
         program: process.execPath,
         args: '--run-tool-b',
-        icon: process.execPath,
+        iconPath: process.execPath,
         iconIndex: 0,
         description: 'Runs Tool B'
       }
@@ -1407,8 +1407,8 @@ const fs = require('fs')
 let filepath
 let bookmark
 
-dialog.showOpenDialog(null, { securityScopedBookmarks: true }, (filepaths, bookmarks) => {
-  filepath = filepaths[0]
+dialog.showOpenDialog(null, { securityScopedBookmarks: true }).then(({ filePaths, bookmarks }) => {
+  filepath = filePaths[0]
   bookmark = bookmarks[0]
   fs.readFileSync(filepath)
 })

docs/api/browser-window.md

@@ -104,6 +104,7 @@ window, you have to set both `parent` and `modal` options:
 ```javascript
 const { BrowserWindow } = require('electron')
 
+const top = new BrowserWindow()
 const child = new BrowserWindow({ parent: top, modal: true, show: false })
 child.loadURL('https://github.com')
 child.once('ready-to-show', () => {
@@ -887,7 +888,7 @@ On Linux the setter is a no-op, although the getter returns `true`.
 
 A `boolean` property that determines whether the window is excluded from the application’s Windows menu. `false` by default.
 
-```js
+```js @ts-expect-error=[11]
 const win = new BrowserWindow({ height: 600, width: 600 })
 
 const template = [
@@ -1490,6 +1491,9 @@ Node's [`url.format`](https://nodejs.org/api/url.html#url_url_format_urlobject)
 method:
 
 ```javascript
+const { BrowserWindow } = require('electron')
+const win = new BrowserWindow()
+
 const url = require('url').format({
   protocol: 'file',
   slashes: true,
@@ -1503,6 +1507,9 @@ You can load a URL using a `POST` request with URL-encoded data by doing
 the following:
 
 ```javascript
+const { BrowserWindow } = require('electron')
+const win = new BrowserWindow()
+
 win.loadURL('http://localhost:8000/post', {
   postData: [{
     type: 'rawData',

docs/api/client-request.md

@@ -95,7 +95,7 @@ The `callback` function is expected to be called back with user credentials:
 * `username` string
 * `password` string
 
-```javascript
+```javascript @ts-type={request:Electron.ClientRequest}
 request.on('login', (authInfo, callback) => {
   callback('username', 'password')
 })
@@ -104,7 +104,7 @@ request.on('login', (authInfo, callback) => {
 Providing empty credentials will cancel the request and report an authentication
 error on the response object:
 
-```javascript
+```javascript @ts-type={request:Electron.ClientRequest}
 request.on('response', (response) => {
   console.log(`STATUS: ${response.statusCode}`)
   response.on('error', (error) => {

docs/api/clipboard.md

@@ -148,10 +148,7 @@ clipboard.
 ```js
 const { clipboard } = require('electron')
 
-clipboard.writeBookmark({
-  text: 'https://electronjs.org',
-  bookmark: 'Electron Homepage'
-})
+clipboard.writeBookmark('Electron Homepage', 'https://electronjs.org')
 ```
 
 ### `clipboard.readFindText()` _macOS_
@@ -226,7 +223,7 @@ clipboard.writeBuffer('public/utf8-plain-text', buffer)
 
 const ret = clipboard.readBuffer('public/utf8-plain-text')
 
-console.log(buffer.equals(out))
+console.log(buffer.equals(ret))
 // true
 ```
 

docs/api/context-bridge.md

@@ -18,7 +18,7 @@ contextBridge.exposeInMainWorld(
 )
 ```
 
-```javascript
+```javascript @ts-nocheck
 // Renderer (Main World)
 
 window.electron.doThing()
@@ -104,7 +104,7 @@ contextBridge.exposeInIsolatedWorld(
 )
 ```
 
-```javascript
+```javascript @ts-nocheck
 // Renderer (In isolated world id1004)
 
 window.electron.doThing()

docs/api/desktop-capturer.md

@@ -10,7 +10,9 @@ title is `Electron`:
 
 ```javascript
 // In the main process.
-const { desktopCapturer } = require('electron')
+const { BrowserWindow, desktopCapturer } = require('electron')
+
+const mainWindow = new BrowserWindow()
 
 desktopCapturer.getSources({ types: ['window', 'screen'] }).then(async sources => {
   for (const source of sources) {
@@ -22,7 +24,7 @@ desktopCapturer.getSources({ types: ['window', 'screen'] }).then(async sources =
 })
 ```
 
-```javascript
+```javascript @ts-nocheck
 // In the preload script.
 const { ipcRenderer } = require('electron')
 

docs/api/dialog.md

@@ -72,7 +72,7 @@ and a directory selector, so if you set `properties` to
 `['openFile', 'openDirectory']` on these platforms, a directory selector will be
 shown.
 
-```js
+```js @ts-type={mainWindow:Electron.BrowserWindow}
 dialog.showOpenDialogSync(mainWindow, {
   properties: ['openFile', 'openDirectory']
 })
@@ -139,7 +139,7 @@ and a directory selector, so if you set `properties` to
 `['openFile', 'openDirectory']` on these platforms, a directory selector will be
 shown.
 
-```js
+```js @ts-type={mainWindow:Electron.BrowserWindow}
 dialog.showOpenDialog(mainWindow, {
   properties: ['openFile', 'openDirectory']
 }).then(result => {

docs/api/incoming-message.md

@@ -89,7 +89,7 @@ tuples. So, the even-numbered offsets are key values, and the odd-numbered
 offsets are the associated values. Header names are not lowercased, and
 duplicates are not merged.
 
-```javascript
+```javascript @ts-type={response:Electron.IncomingMessage}
 // Prints something like:
 //
 // [ 'user-agent',
@@ -100,5 +100,5 @@ duplicates are not merged.
 //   '127.0.0.1:8000',
 //   'ACCEPT',
 //   '*/*' ]
-console.log(request.rawHeaders)
+console.log(response.rawHeaders)
 ```

docs/api/ipc-main.md

@@ -83,14 +83,14 @@ If `listener` returns a Promise, the eventual result of the promise will be
 returned as a reply to the remote caller. Otherwise, the return value of the
 listener will be used as the value of the reply.
 
-```js title='Main Process'
+```js title='Main Process' @ts-type={somePromise:(...args:unknown[])=>Promise<unknown>}
 ipcMain.handle('my-invokable-ipc', async (event, ...args) => {
   const result = await somePromise(...args)
   return result
 })
 ```
 
-```js title='Renderer Process'
+```js title='Renderer Process' @ts-type={arg1:unknown} @ts-type={arg2:unknown}
 async () => {
   const result = await ipcRenderer.invoke('my-invokable-ipc', arg1, arg2)
   // ...

docs/api/ipc-renderer.md

@@ -101,7 +101,7 @@ The main process should listen for `channel` with
 
 For example:
 
-```javascript
+```javascript @ts-type={someArgument:unknown} @ts-type={doSomeWork:(arg:unknown)=>Promise<unknown>}
 // Renderer process
 ipcRenderer.invoke('some-name', someArgument).then((result) => {
   // ...

docs/api/menu.md

@@ -147,7 +147,7 @@ can have a submenu.
 
 An example of creating the application menu with the simple template API:
 
-```javascript
+```javascript @ts-expect-error=[107]
 const { app, Menu } = require('electron')
 
 const isMac = process.platform === 'darwin'
@@ -267,7 +267,7 @@ menu on behalf of the renderer.
 
 Below is an example of showing a menu when the user right clicks the page:
 
-```js
+```js @ts-expect-error=[21]
 // renderer
 window.addEventListener('contextmenu', (e) => {
   e.preventDefault()
@@ -289,7 +289,7 @@ ipcMain.on('show-context-menu', (event) => {
     { label: 'Menu Item 2', type: 'checkbox', checked: true }
   ]
   const menu = Menu.buildFromTemplate(template)
-  menu.popup(BrowserWindow.fromWebContents(event.sender))
+  menu.popup({ window: BrowserWindow.fromWebContents(event.sender) })
 })
 ```
 

docs/api/message-channel-main.md

@@ -17,7 +17,8 @@ Example:
 
 ```js
 // Main process
-const { MessageChannelMain } = require('electron')
+const { BrowserWindow, MessageChannelMain } = require('electron')
+const w = new BrowserWindow()
 const { port1, port2 } = new MessageChannelMain()
 w.webContents.postMessage('port', null, [port2])
 port1.postMessage({ some: 'message' })
@@ -26,9 +27,9 @@ port1.postMessage({ some: 'message' })
 const { ipcRenderer } = require('electron')
 ipcRenderer.on('port', (e) => {
   // e.ports is a list of ports sent along with this message
-  e.ports[0].on('message', (messageEvent) => {
+  e.ports[0].onmessage = (messageEvent) => {
     console.log(messageEvent.data)
-  })
+  }
 })
 ```
 

docs/api/net-log.md

@@ -5,7 +5,7 @@
 Process: [Main](../glossary.md#main-process)
 
 ```javascript
-const { netLog } = require('electron')
+const { app, netLog } = require('electron')
 
 app.whenReady().then(async () => {
   await netLog.startLogging('/path/to/net-log')

docs/api/protocol.md

@@ -36,7 +36,7 @@ To have your custom protocol work in combination with a custom session, you need
 to register it to that session explicitly.
 
 ```javascript
-const { session, app, protocol } = require('electron')
+const { app, BrowserWindow, net, protocol, session } = require('electron')
 const path = require('path')
 
 app.whenReady().then(() => {
@@ -48,7 +48,7 @@ app.whenReady().then(() => {
     callback({ path: path.normalize(path.join(__dirname, url)) })
   })
 
-  mainWindow = new BrowserWindow({ webPreferences: { partition } })
+  const mainWindow = new BrowserWindow({ webPreferences: { partition } })
 })
 ```
 

docs/api/session.md

@@ -82,7 +82,7 @@ Emitted when Electron is about to download `item` in `webContents`.
 Calling `event.preventDefault()` will cancel the download and `item` will not be
 available from next tick of the process.
 
-```javascript
+```javascript @ts-expect-error=[4]
 const { session } = require('electron')
 session.defaultSession.on('will-download', (event, item, webContents) => {
   event.preventDefault()
@@ -198,7 +198,7 @@ cancel the request.  Additionally, permissioning on `navigator.hid` can
 be further managed by using [`ses.setPermissionCheckHandler(handler)`](#sessetpermissioncheckhandlerhandler)
 and [`ses.setDevicePermissionHandler(handler)`](#sessetdevicepermissionhandlerhandler).
 
-```javascript
+```javascript @ts-type={fetchGrantedDevices:()=>(Array<Electron.DevicePermissionHandlerHandlerDetails['device']>)}
 const { app, BrowserWindow } = require('electron')
 
 let win = null
@@ -237,7 +237,7 @@ app.whenReady().then(() => {
   win.webContents.session.on('select-hid-device', (event, details, callback) => {
     event.preventDefault()
     const selectedDevice = details.deviceList.find((device) => {
-      return device.vendorId === '9025' && device.productId === '67'
+      return device.vendorId === 9025 && device.productId === 67
     })
     callback(selectedDevice?.deviceId)
   })
@@ -304,7 +304,7 @@ cancel the request.  Additionally, permissioning on `navigator.serial` can
 be managed by using [ses.setPermissionCheckHandler(handler)](#sessetpermissioncheckhandlerhandler)
 with the `serial` permission.
 
-```javascript
+```javascript @ts-type={fetchGrantedDevices:()=>(Array<Electron.DevicePermissionHandlerHandlerDetails['device']>)}
 const { app, BrowserWindow } = require('electron')
 
 let win = null
@@ -447,7 +447,7 @@ cancel the request.  Additionally, permissioning on `navigator.usb` can
 be further managed by using [`ses.setPermissionCheckHandler(handler)`](#sessetpermissioncheckhandlerhandler)
 and [`ses.setDevicePermissionHandler(handler)`](#sessetdevicepermissionhandlerhandler).
 
-```javascript
+```javascript @ts-type={fetchGrantedDevices:()=>(Array<Electron.DevicePermissionHandlerHandlerDetails['device']>)} @ts-type={updateGrantedDevices:(devices:Array<Electron.DevicePermissionHandlerHandlerDetails['device']>)=>void}
 const { app, BrowserWindow } = require('electron')
 
 let win = null
@@ -486,7 +486,7 @@ app.whenReady().then(() => {
   win.webContents.session.on('select-usb-device', (event, details, callback) => {
     event.preventDefault()
     const selectedDevice = details.deviceList.find((device) => {
-      return device.vendorId === '9025' && device.productId === '67'
+      return device.vendorId === 9025 && device.productId === 67
     })
     if (selectedDevice) {
       // Optionally, add this to the persisted devices (updateGrantedDevices needs to be implemented by developer to persist permissions)
@@ -741,15 +741,17 @@ Sets download saving directory. By default, the download directory will be the
 Emulates network with the given configuration for the `session`.
 
 ```javascript
+const win = new BrowserWindow()
+
 // To emulate a GPRS connection with 50kbps throughput and 500 ms latency.
-window.webContents.session.enableNetworkEmulation({
+win.webContents.session.enableNetworkEmulation({
   latency: 500,
   downloadThroughput: 6400,
   uploadThroughput: 6400
 })
 
 // To emulate a network outage.
-window.webContents.session.enableNetworkEmulation({ offline: true })
+win.webContents.session.enableNetworkEmulation({ offline: true })
 ```
 
 #### `ses.preconnect(options)`
@@ -967,7 +969,7 @@ Additionally, the default behavior of Electron is to store granted device permis
 If longer term storage is needed, a developer can store granted device
 permissions (eg when handling the `select-hid-device` event) and then read from that storage with `setDevicePermissionHandler`.
 
-```javascript
+```javascript @ts-type={fetchGrantedDevices:()=>(Array<Electron.DevicePermissionHandlerHandlerDetails['device']>)}
 const { app, BrowserWindow } = require('electron')
 
 let win = null
@@ -1015,9 +1017,9 @@ app.whenReady().then(() => {
   win.webContents.session.on('select-hid-device', (event, details, callback) => {
     event.preventDefault()
     const selectedDevice = details.deviceList.find((device) => {
-      return device.vendorId === '9025' && device.productId === '67'
+      return device.vendorId === 9025 && device.productId === 67
     })
-    callback(selectedPort?.deviceId)
+    callback(selectedDevice?.deviceId)
   })
 })
 ```
@@ -1105,32 +1107,32 @@ macOS does not require a handler because macOS handles the pairing
 automatically.  To clear the handler, call `setBluetoothPairingHandler(null)`.
 
 ```javascript
-
-const { app, BrowserWindow, ipcMain, session } = require('electron')
-
-let bluetoothPinCallback = null
+const { app, BrowserWindow, session } = require('electron')
+const path = require('path')
 
 function createWindow () {
+  let bluetoothPinCallback = null
+
   const mainWindow = new BrowserWindow({
     webPreferences: {
       preload: path.join(__dirname, 'preload.js')
     }
   })
+
+  mainWindow.webContents.session.setBluetoothPairingHandler((details, callback) => {
+    bluetoothPinCallback = callback
+    // Send a IPC message to the renderer to prompt the user to confirm the pairing.
+    // Note that this will require logic in the renderer to handle this message and
+    // display a prompt to the user.
+    mainWindow.webContents.send('bluetooth-pairing-request', details)
+  })
+
+  // Listen for an IPC message from the renderer to get the response for the Bluetooth pairing.
+  mainWindow.webContents.ipc.on('bluetooth-pairing-response', (event, response) => {
+    bluetoothPinCallback(response)
+  })
 }
 
-// Listen for an IPC message from the renderer to get the response for the Bluetooth pairing.
-ipcMain.on('bluetooth-pairing-response', (event, response) => {
-  bluetoothPinCallback(response)
-})
-
-mainWindow.webContents.session.setBluetoothPairingHandler((details, callback) => {
-  bluetoothPinCallback = callback
-  // Send a IPC message to the renderer to prompt the user to confirm the pairing.
-  // Note that this will require logic in the renderer to handle this message and
-  // display a prompt to the user.
-  mainWindow.webContents.send('bluetooth-pairing-request', details)
-})
-
 app.whenReady().then(() => {
   createWindow()
 })

docs/api/touch-bar.md

@@ -87,12 +87,12 @@ const { TouchBarLabel, TouchBarButton, TouchBarSpacer } = TouchBar
 let spinning = false
 
 // Reel labels
-const reel1 = new TouchBarLabel()
-const reel2 = new TouchBarLabel()
-const reel3 = new TouchBarLabel()
+const reel1 = new TouchBarLabel({ label: '' })
+const reel2 = new TouchBarLabel({ label: '' })
+const reel3 = new TouchBarLabel({ label: '' })
 
 // Spin result label
-const result = new TouchBarLabel()
+const result = new TouchBarLabel({ label: '' })
 
 // Spin button
 const spin = new TouchBarButton({

docs/api/web-contents.md

@@ -68,7 +68,7 @@ async function lookupTargetId (browserWindow) {
   await wc.debugger.attach('1.3')
   const { targetInfo } = await wc.debugger.sendCommand('Target.getTargetInfo')
   const { targetId } = targetInfo
-  const targetWebContents = await webContents.fromDevToolsTargetId(targetId)
+  const targetWebContents = await wc.fromDevToolsTargetId(targetId)
 }
 ```
 
@@ -906,9 +906,9 @@ e.g. the `http://` or `file://`. If the load should bypass http cache then
 use the `pragma` header to achieve it.
 
 ```javascript
-const { webContents } = require('electron')
+const win = new BrowserWindow()
 const options = { extraHeaders: 'pragma: no-cache\n' }
-webContents.loadURL('https://github.com', options)
+win.webContents.loadURL('https://github.com', options)
 ```
 
 #### `contents.loadFile(filePath[, options])`
@@ -938,6 +938,7 @@ an app structure like this:
 Would require code like this
 
 ```js
+const win = new BrowserWindow()
 win.loadFile('src/index.html')
 ```
 
@@ -1074,7 +1075,9 @@ when this process is unstable or unusable, for instance in order to recover
 from the `unresponsive` event.
 
 ```js
-contents.on('unresponsive', async () => {
+const win = new BrowserWindow()
+
+win.webContents.on('unresponsive', async () => {
   const { response } = await dialog.showMessageBox({
     message: 'App X has become unresponsive',
     title: 'Do you want to try forcefully reloading the app?',
@@ -1082,8 +1085,8 @@ contents.on('unresponsive', async () => {
     cancelId: 1
   })
   if (response === 0) {
-    contents.forcefullyCrashRenderer()
-    contents.reload()
+    win.webContents.forcefullyCrashRenderer()
+    win.webContents.reload()
   }
 })
 ```
@@ -1110,8 +1113,9 @@ Injects CSS into the current web page and returns a unique key for the inserted
 stylesheet.
 
 ```js
-contents.on('did-finish-load', () => {
-  contents.insertCSS('html, body { background-color: #f00; }')
+const win = new BrowserWindow()
+win.webContents.on('did-finish-load', () => {
+  win.webContents.insertCSS('html, body { background-color: #f00; }')
 })
 ```
 
@@ -1125,9 +1129,11 @@ Removes the inserted CSS from the current web page. The stylesheet is identified
 by its key, which is returned from `contents.insertCSS(css)`.
 
 ```js
-contents.on('did-finish-load', async () => {
-  const key = await contents.insertCSS('html, body { background-color: #f00; }')
-  contents.removeInsertedCSS(key)
+const win = new BrowserWindow()
+
+win.webContents.on('did-finish-load', async () => {
+  const key = await win.webContents.insertCSS('html, body { background-color: #f00; }')
+  win.webContents.removeInsertedCSS(key)
 })
 ```
 
@@ -1148,7 +1154,9 @@ this limitation.
 Code execution will be suspended until web page stop loading.
 
 ```js
-contents.executeJavaScript('fetch("https://jsonplaceholder.typicode.com/users/1").then(resp => resp.json())', true)
+const win = new BrowserWindow()
+
+win.webContents.executeJavaScript('fetch("https://jsonplaceholder.typicode.com/users/1").then(resp => resp.json())', true)
   .then((result) => {
     console.log(result) // Will be the JSON object from the fetch call
   })
@@ -1259,7 +1267,8 @@ Sets the maximum and minimum pinch-to-zoom level.
 > **NOTE**: Visual zoom is disabled by default in Electron. To re-enable it, call:
 >
 > ```js
-> contents.setVisualZoomLevelLimits(1, 3)
+> const win = new BrowserWindow()
+> win.webContents.setVisualZoomLevelLimits(1, 3)
 > ```
 
 #### `contents.undo()`
@@ -1350,12 +1359,12 @@ can be obtained by subscribing to [`found-in-page`](web-contents.md#event-found-
 Stops any `findInPage` request for the `webContents` with the provided `action`.
 
 ```javascript
-const { webContents } = require('electron')
-webContents.on('found-in-page', (event, result) => {
-  if (result.finalUpdate) webContents.stopFindInPage('clearSelection')
+const win = new BrowserWindow()
+win.webContents.on('found-in-page', (event, result) => {
+  if (result.finalUpdate) win.webContents.stopFindInPage('clearSelection')
 })
 
-const requestId = webContents.findInPage('api')
+const requestId = win.webContents.findInPage('api')
 console.log(requestId)
 ```
 
@@ -1435,6 +1444,7 @@ Use `page-break-before: always;` CSS style to force to print to a new page.
 Example usage:
 
 ```js
+const win = new BrowserWindow()
 const options = {
   silent: true,
   deviceName: 'My-Printer',
@@ -1731,8 +1741,9 @@ For example:
 
 ```js
 // Main process
+const win = new BrowserWindow()
 const { port1, port2 } = new MessageChannelMain()
-webContents.postMessage('port', { message: 'hello' }, [port1])
+win.webContents.postMessage('port', { message: 'hello' }, [port1])
 
 // Renderer process
 ipcRenderer.on('port', (e, msg) => {

docs/api/web-frame-main.md

@@ -128,8 +128,9 @@ For example:
 
 ```js
 // Main process
+const win = new BrowserWindow()
 const { port1, port2 } = new MessageChannelMain()
-webContents.mainFrame.postMessage('port', { message: 'hello' }, [port1])
+win.webContents.mainFrame.postMessage('port', { message: 'hello' }, [port1])
 
 // Renderer process
 ipcRenderer.on('port', (e, msg) => {

docs/api/web-frame.md

@@ -96,13 +96,12 @@ with an array of misspelt words when complete.
 
 An example of using [node-spellchecker][spellchecker] as provider:
 
-```javascript
+```javascript @ts-expect-error=[2,6]
 const { webFrame } = require('electron')
 const spellChecker = require('spellchecker')
 webFrame.setSpellCheckProvider('en-US', {
   spellCheck (words, callback) {
     setTimeout(() => {
-      const spellchecker = require('spellchecker')
       const misspelled = words.filter(x => spellchecker.isMisspelled(x))
       callback(misspelled)
     }, 0)

docs/api/webview-tag.md

@@ -255,7 +255,7 @@ The `webview` tag has the following methods:
 
 **Example**
 
-```javascript
+```javascript @ts-expect-error=[3]
 const webview = document.querySelector('webview')
 webview.addEventListener('dom-ready', () => {
   webview.openDevTools()
@@ -776,7 +776,7 @@ Fired when the guest window logs a console message.
 The following example code forwards all log messages to the embedder's console
 without regard for log level or other properties.
 
-```javascript
+```javascript @ts-expect-error=[3]
 const webview = document.querySelector('webview')
 webview.addEventListener('console-message', (e) => {
   console.log('Guest page logged a message:', e.message)
@@ -797,7 +797,7 @@ Returns:
 Fired when a result is available for
 [`webview.findInPage`](#webviewfindinpagetext-options) request.
 
-```javascript
+```javascript @ts-expect-error=[3,6]
 const webview = document.querySelector('webview')
 webview.addEventListener('found-in-page', (e) => {
   webview.stopFindInPage('keepSelection')
@@ -900,7 +900,7 @@ Fired when the guest page attempts to close itself.
 The following example code navigates the `webview` to `about:blank` when the
 guest attempts to close itself.
 
-```javascript
+```javascript @ts-expect-error=[3]
 const webview = document.querySelector('webview')
 webview.addEventListener('close', () => {
   webview.src = 'about:blank'
@@ -920,7 +920,7 @@ Fired when the guest page has sent an asynchronous message to embedder page.
 With `sendToHost` method and `ipc-message` event you can communicate
 between guest page and embedder page:
 
-```javascript
+```javascript @ts-expect-error=[4,7]
 // In embedder page.
 const webview = document.querySelector('webview')
 webview.addEventListener('ipc-message', (event) => {