JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input name="field1" type="text" value="test" />
    <input name="field2" type="checkbox" value="4" checked />
    <textarea name="field3">Test Value</textarea>
</form>

JavaScript

jQuery.fn.MakeIntoFields = function() {
  var arr = this.serializeArray();
  var props = {};
  $.each(arr, function(i, f) {
    props[f.name] = f.value;
  });
  return props;
};

var PostData = $("form").MakeIntoFields();

alert(PostData["field1"]);
alert(PostData.field2);