JavaScript阻止网页关闭

1. 页面既无法关闭，也无法刷新

window.onbeforeunload = (e) => {
  console.log('I do not want to be closed')

  // Unlike usual browsers that a message box will be prompted to users, returning
  // a non-void value will silently cancel the close.
  // It is recommended to use the dialog API to let the user confirm closing the
  // application.
  e.returnValue = false
}

2. 页面无法关闭

let canQuit = false;

mainWindow.on('close', (event) => {

if (!canQuit) {

    event.preventDefault();}

});