// run this in the terminal to save the state of all inputs
// in your browser's LocalStorage:
[].forEach.call(document.querySelectorAll("input"), function(el) {
  localStorage.setItem(el.name, el.value);
});

// then refresh the page and run this to restore your form values:
[].forEach.call(document.querySelectorAll("input"), function(el) {
  el.value = localStorage.getItem(el.name);
});