text: const {app,BrowserWindow}=require('electron')
  const path=require('path')
  const url =require('url')
  
  let win
  
  function createWindow(){
      win = new BrowserWindow({width:800,height:600}),
      win.loadURL(url.format({
          pathname:path.join(__dirname,'index.html'),
          protocol:'file:',
          slashes:true
      }))
  
  
      //win.webContents.openDevTools()
  
      win.on('close',()=>{
          win=null
      })
      }
  
      app.on('ready',createWindow)
  
      app.on('window-all-closed',()=>{
          if(process.platform !=="darwin"){
              app.quit()
          }
      })
  
      app.on('activate',()=>{
          if(win===null){
              createWindow()
          }
      })
  