chore: initial linting fixes for JS in docs/fiddles (#37689)

docs/fiddles/system/protocol-handler/launch-app-from-URL-in-another-app/main.js

@@ -2,14 +2,14 @@
 const { app, BrowserWindow, ipcMain, shell, dialog } = require('electron')
 const path = require('path')
 
-let mainWindow;
+let mainWindow
 
 if (process.defaultApp) {
   if (process.argv.length >= 2) {
     app.setAsDefaultProtocolClient('electron-fiddle', process.execPath, [path.resolve(process.argv[1])])
   }
 } else {
-    app.setAsDefaultProtocolClient('electron-fiddle')
+  app.setAsDefaultProtocolClient('electron-fiddle')
 }
 
 const gotTheLock = app.requestSingleInstanceLock()
@@ -24,7 +24,7 @@ if (!gotTheLock) {
       mainWindow.focus()
     }
 
-    dialog.showErrorBox('Welcome Back', `You arrived from: ${commandLine.pop().slice(0,-1)}`)
+    dialog.showErrorBox('Welcome Back', `You arrived from: ${commandLine.pop().slice(0, -1)}`)
   })
 
   // Create mainWindow, load the rest of the app, etc...
@@ -43,7 +43,7 @@ function createWindow () {
     width: 800,
     height: 600,
     webPreferences: {
-      preload: path.join(__dirname, 'preload.js'),
+      preload: path.join(__dirname, 'preload.js')
     }
   })
 

docs/fiddles/system/protocol-handler/launch-app-from-URL-in-another-app/preload.js

@@ -6,6 +6,6 @@ const { contextBridge, ipcRenderer } = require('electron')
 contextBridge.exposeInMainWorld(
   'shell',
   {
-    open: () => ipcRenderer.send('shell:open'),
+    open: () => ipcRenderer.send('shell:open')
   }
-)
+)

docs/fiddles/system/protocol-handler/launch-app-from-URL-in-another-app/renderer.js

@@ -4,5 +4,5 @@
 
 // Binds the buttons to the context bridge API.
 document.getElementById('open-in-browser').addEventListener('click', () => {
-  shell.open();
-});
+  window.shell.open()
+})