preload.js

const { contextBridge, ipcRenderer } = require('electron');

contextBridge.exposeInMainWorld('ipc', {
	submit: (channel, ...data) => {
		console.log('api send');
		const validChannels = ['toMain'];
		if (validChannels.includes(channel)) {
			ipcRenderer.send(channel, ...data);
		}
	},
	subscribe: (channel, fn) => {
		// debugger;
		console.log('api receive', channel, fn);
		const validChannels = ['fromMain'];
		if (!validChannels.includes(channel)) return () => { };
		const handler = (event, ...args) => fn(...args);
		ipcRenderer.on(channel, handler);
		return () => { ipcRenderer.removeListener(channel, handler); };
	},
	request: async (key, ...args) => ipcRenderer.invoke(key, ...args),
});