localStorage：自动选中商店复选框

I have something like this in php:

    if(isset($_POST['submit']){ 
            $check = in_array($row['service_object_id'], $values) ? 'checked' : ''; 
    }                       
    echo '<input type="checkbox" class="faChkRnd" id="'.$row['service_object_id'].'" name="list[]" value="'.$row['service_object_id'].'" '.$check.'>';

Each time I press a submit button, it will check the checkboxes with values inside $check. It's working good but I want to store the checkboxes checked in localStorage automatically after pressing the button.

I already use this script to store them after click, but it won't work automatically :

    <script type = "text/javascript"> 
$('.faChkRnd').on('click', function() {
  var fav, favs = [];
  $('.faChkRnd').each(function() { // run through each of the checkboxes
    fav = {id: $(this).attr('id'), value: $(this).prop('checked')};
    favs.push(fav);
  });
  localStorage.setItem("favorites", JSON.stringify(favs));
});

$(document).ready(function() {
  var favorites = JSON.parse(localStorage.getItem('favorites'));
  if (!favorites.length) {return};
  console.debug(favorites);

  for (var i=0; i<favorites.length; i++) {
    console.debug(favorites[i].value == 'on');
    $('#' + favorites[i].id ).prop('checked', favorites[i].value);
  }
});
</script>

Any ideas ? Thank you !

you shound check type of favorites[i].value. string or boolean !?

string :

if(favorites[i].value == "true") {
    $('#' + favorites[i].id ).prop('checked',true);
}

boolean :

$('#' + favorites[i].id ).prop('checked',favorites[i].value);

example :

string : https://jsfiddle.net/utm4za2p/1/

boolean : https://jsfiddle.net/utm4za2p/3/

You can use submit method.
You have a form with the submit button and you have to change it to just a regular button.

And you should put

$('.yourForm').submit()  

to the end of click handler where you save the values to the localStorage.

Because when you press the submit button it may triggered before your click handler.
You need save values first and then submit form.