electron主进程和渲染进程之间的通信

主进程 (main.js)

const { app, BrowserWindow, ipcMain } = require("electron");
const path = require("node:path");
// 导入fs模块
const fs = require("fs");const createWindow = () => {const win = new BrowserWindow({width: 800,height: 600,webPreferences: {preload: path.join(__dirname, "preload.js"),},});win.loadFile("index.html");
};
app.whenReady().then(() => {createWindow();
});// 主进程接收渲染进程发送的消息
ipcMain.on("message-from-renderer", (event, data) => {let baseDir = "D:\\"; //保存的根路径let FileLocation = "001.text"; //文件名const url = path.join(baseDir, FileLocation);// 调用fs.writeFile() 写入文件内容fs.writeFile(url, data, function (err) {if (err) {return console.log("File write error" + err.message);}console.log("File write success");// 收到消息后给子窗口child回复消息event.sender.send("reply-msg-child", "我是父窗口，我接收到了子窗口的消息");});
});

预加载脚本 (preload.js)

const { contextBridge, ipcRenderer } = require("electron");contextBridge.exposeInMainWorld("versions", {node: process.versions.node,chrome: process.versions.chrome,electron: process.versions.electron,
});contextBridge.exposeInMainWorld("api", {send: (channel, data) => {ipcRenderer.send(channel, data);},receive: (channel, func) => {ipcRenderer.on(channel, (event, ...args) => func(...args));},
});

渲染进程 (index.html 和 renderer.js)

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><metahttp-equiv="Content-Security-Policy"content="default-src 'self'; script-src 'self'"/><metahttp-equiv="X-Content-Security-Policy"content="default-src 'self'; script-src 'self'"/><title>Hello from Electron renderer!</title></head><body><p id="info"></p><button id="btn1">点击</button></body><script src="./renderer.js"></script>
</html>

const information = document.getElementById("info");
console.log(window);
information.innerText = `This app is using Chrome (v${versions.chrome}), Node.js (v${versions.node}), and Electron (v${versions.electron})`;const btn1 = document.getElementById("btn1");btn1.onclick = function () {// 发送消息到主进程window.api.send("message-from-renderer", "Hello from Renderer Process");
};// 接收来自主进程的回应
window.api.receive("reply-msg-child", (args) => {alert(args);
});