JAVASCRIPT

Convert form data to JavaScript object with jQuery

$.fn.getForm2obj = function() {
  var _ = {};
  $.map(this.serializeArray(), function(n) {
    const keys = n.name.match(/[a-zA-Z0-9_]+|(?=[])/g);
    if (keys.length > 1) {
      let tmp = _;
      pop = keys.pop();
      for (let i = 0; i < keys.length, j = keys[i]; i++) {
        tmp[j] = (!tmp[j] ? (pop == '') ? [] : {} : tmp[j]), tmp = tmp[j];
      }
      if (pop == '') tmp = (!Array.isArray(tmp) ? [] : tmp), tmp.push(n.value);
      else tmp[pop] = n.value;
    } else _[keys.pop()] = n.value;
  });
  return _;
}

$('form').getForm2obj();