How to prevent the application from closing?

Question

Windows

Good afternoon, tell me if there is a solution?
Need to prevent the browser in which the tab is open from closing?

Answer 1

prevent closing the browser - no way. but you can display an alert when you try to close the tab:

window.onunload = function()
{
    return confirm('Вы хотите покинуть сайт?')
}
window.onbeforeunload = function(){
    return confirm('Точно хотите выйти?');
}

but even so, some browsers ignore it.