jQuery implements statistics on the number of selected check boxes_jquery

The code is very brief and the function is very simple, but it is very practical. I will not explain it in detail here and just go to the code

jQuery code:

Copy code The code is as follows:

function countNum(){
                  //alert($('input[name=check]:checked').length);
        var arrays = new Array();
            var items = document.getElementsByName("check");
              for(var i=0;i If(items[i].checked){
                       arrays.push(items[i].value);
                                                                                                                  }
             alert(arrays.length);
}

HTML code:

Copy code The code is as follows:

Partners in the project who have the same needs can refer to it. If you have a better way, please contact me.