问如何将函数转换为JQuery插件

EN

function probe_Validity(element) {
  var validate = true;
  $(".required-label").remove();

  var warnings = {
    text: "Please enter Name"
  };

  element.find(".required").each(function() {
    var form_Data = $(this);

    if (form_Data.prop("type").toLowerCase() === 'text' && form_Data.val() === '') {
      form_Data.after('<div class="required-label">' + warnings.text + '</div>').addClass('required-active');
      validate = false;
    }
    if (validate) {
      return true;
    } else {
      return false;
    }

    $(function() {
      $(".required").on("focus click", function() {
        $(this).removeClass('required-active');
        $(this).next().remove();
      });
    });
  });
}