如何在BrowserWindow (电子)中打开标记文件？

const { app, BrowserWindow, dialog } = require('electron');
const fs = require('fs');

let mainWindow;

app.on('ready', () => {
  mainWindow = new BrowserWindow({
    webPreferences: {
      nodeIntegration: true
    }
  });

  // 打开文件选择对话框
  dialog.showOpenDialog(mainWindow, {
    properties: ['openFile'],
    filters: [
      { name: '标记文件', extensions: ['html', 'htm'] }
    ]
  }).then(result => {
    if (!result.canceled) {
      const filePath = result.filePaths[0];
      
      // 读取文件内容
      fs.readFile(filePath, 'utf-8', (err, data) => {
        if (err) throw err;
        
        // 加载文件内容到BrowserWindow中
        mainWindow.loadURL(`file://${filePath}`);
      });
    }
  });
});