electron/docs/api/structures/ipc-renderer-event.md

IpcRendererEvent Object extends Event

• sender IpcRenderer - The IpcRenderer instance that emitted the event originally
• senderId Integer - The webContents.id that sent the message, you can call event.sender.sendTo(event.senderId, ...) to reply to the message, see ipcRenderer.sendTo for more information. This only applies to messages sent from a different renderer. Messages sent directly from the main process set event.senderId to 0.
• senderIsMainFrame boolean (optional) - Whether the message sent via ipcRenderer.sendTo was sent by the main frame. This is relevant when nodeIntegrationInSubFrames is enabled in the originating webContents.
• ports MessagePort[] - A list of MessagePorts that were transferred with this message