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" />
    <meta
      http-equiv="Content-Security-Policy"
      content="default-src 'self'; script-src 'self'"
    />
    <meta
      http-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);
});