IPC Communication Between Processes

ipcMain.handle registers a named channel in the main process that responds to requests from the renderer. It accepts an async handler function and its return value becomes the resolved value of the Promise in the renderer, making it ideal for operations like reading files or querying a database.

ipcRenderer.invoke sends a message on a named channel and returns a Promise that resolves with the main process handler's return value. This creates a clean async request-response pattern that works naturally with async/await in both the preload script and React components.