Jquery check box to select and uncheck the example

Function:

A: when you click the checkbox, select all the subcheckboxes, and then click to uncheck all the checkboxes

B: if one child check box is selected, the parent check box is selected. If all children check boxes are not selected, the parent check box is not selected

function selectAll(mainId,klass){
 $("." + klass).each(function(){
     if($("#" + mainId).attr("checked")== "checked"){
      $(this).attr("checked", "checked");
     }
     else{
      $(this).removeAttr("checked");
     }
 });
}

The above implementation selects and unchecks all subboxes, and the implementation of the data receives an array of check boxes in the controller

function checkSonCheckBox(father,son){
 $("."+son).click(function(){
  if($(this).attr("checked")== "checked"){
   $(this).addClass("checked");
  }else{
   $(this).removeClass("checked");
  }
  if($("."+son).hasClass("checked")){
   $("#"+father).attr("checked","checked");
//      Console.log (" at least one child check box selected!" );
  }else{
   $("#"+father).removeAttr("checked");
//      Console. Log (" all child checkboxes not selected!" );
  }
 });
};

The above implementation allows one child check box to be selected so that all child check boxes are not selected so that the parent check box is not selected