send

Send an asynchronous message to the main process via channel, along with arguments. Arguments will be serialized with the Structured Clone Algorithm, just like window.postMessage, so prototype chains will not be included. Sending Functions, Promises, Symbols, WeakMaps, or WeakSets will throw an exception.

NOTE: Sending non-standard JavaScript types such as DOM objects or special Electron objects will throw an exception.

Since the main process does not have support for DOM objects such as ImageBitmap, File, DOMMatrix and so on, such objects cannot be sent over Electron's IPC to the main process, as the main process would have no way to decode them. Attempting to send such objects over IPC will result in an error.

The main process handles it by listening for channel with the ipcMain module.

If you need to transfer a MessagePort to the main process, use ipcRenderer.postMessage.

If you want to receive a single response from the main process, like the result of a method call, consider using ipcRenderer.invoke.