Serialize form data to JSON with jQuery

serialize-form-jquery.js

$.fn.serializeFormJSON = function () {
  var o = {};
  var a = this.serializeArray();
  $.each(a, function () {
    if (o[this.name]) {
      if (!o[this.name].push) {
        o[this.name] = [o[this.name]];
      }
      o[this.name].push(this.value || '');
    } else {
      o[this.name] = this.value || '';
    }
  });
  return o;
};

Used:

 $('#form-id').on('submit', function(e) {
        e.preventDefault();
        var json = $(this).serializeFormJSON();
}