electron

// 区分生产和开发环境
if (app.isPackaged) {
    win.loadFile('dist/index.html');
} else {
    win.loadURL('http://localhost:8888/');
}

// main.js 主进程
mainWindow.webContents.send('update-counter', 234)

// preload.js 渲染进程 暴露到window.electronAPI
contextBridge.exposeInMainWorld('electronAPI', {
  handleCounter: (callback) => ipcRenderer.on('update-counter', callback) // 监听主进程事件
});

// renderer.js 预加载脚本
window.electronAPI.handleCounter((event, value) => {
  // value: 234
  const oldValue = Number(counter.innerText)
  const newValue = oldValue + value
  counter.innerText = newValue
  event.sender.send('counter-value', newValue)
})

// main.js
ipcMain.on('set-title', (event, title) => {
    const webContents = event.sender
    const win = BrowserWindow.fromWebContents(webContents)
    win.setTitle(title)
})

// preload.js
contextBridge.exposeInMainWorld('electronAPI', {
  setTitle: (title) => ipcRenderer.send('set-title', title)
})

// renderer.js JS脚本
window.electronAPI.setTitle(title)

const {
  app, BrowserWindow, Menu, ipcMain, session,
} = require('electron');
const path = require('path');
const os = require('os');

session.defaultSession.on('will-download', (event, item, webContents) => {
    const fileName = item.getFilename();
    const _path = path.join(os.homedir(), `Downloads/${fileName}`);
    item.setSavePath(_path);
    item.once('done', (event, state) => {
        if (state === 'completed') {
            require('fs').chmodSync(_path, 0o444);
            // const message = `下载完成，保存至${_path}`;
            console.log(`downloadCompleted: ${_path}`);
            win.webContents.send('downloadCompleted', _path);
        }
        console.log(`Download status: ${state}`);
    });
});