Question

form posting is a very common operation on web site, and for better user experience,
we need prevent user from mistaken close the window or click a wrong link, just like this page 🙂

So is there a standard way or gem to do it in rails?

Answer 1

var edited = false;

$('#formId :input').change(function() {
    if(!edited) {
      edited = true;
    }
});

window.onbeforeunload = preventUser();

function preventUser() {
  if(edited) {
    alert("Are you sure?");
  }
}