使用jQuery将子动态添加到ul

Question

I want to add a custum li to an ol with jquery event, this is my code

success: function(data) {
            if (data != ''){
                $ulSub = $("#firstList");
                                $("#Pushtype_destinationList").val(crit1);
                $.each(data.dataa, function (i,item) {
           $str="";

                    for(var key in item){ if(key != 'id'){$str+= item[key]} }
                    $ulSub.append( '<li class="ui-widget-content " id="'+item.id +'" >' +$str+'</li>');

                });
            }
        }

and my code in html given as follow

 <ol class="selected" id="firstList">
                <li class="ui-widget-content ">text 1</li>
                <li class="ui-widget-content ">text 2</li>

            </ol>

and the function jquery that add an element li from the first ol to the second ol is as

    jQuery('ol#firstList li').click(function() {

       $(this).toggleClass('selected');

      $('#result').html($('#firstList .selected').clone())

   });

until now every thing work great, but when I clic on a new element add dynamically by using this function

 ( `for(var key in item){ if(key != 'id'){$str+= item[key]} }
                            $ulSub.append( '<li class="ui-widget-content " id="'+item.id +'" >' +$str+'</li>');

                        });)   

this element cannot be added to the second <ol id="result>

as you see here, when the element text1 and text2 are added when i clic on them, but the other element which are added dynamically not

any help please

Answer 1

It happens because you only assign your event handler to items already existing in the DOM by the time your event handler assignment code runs.

Try:

jQuery(document).on('click', 'ol#firstList li', function() {
     $(this).toggleClass('selected');
     $('#result').html($('#firstList .selected').clone())
});

Look jQuery documentation for '.on' for further details.

Answer 2

clear html before each loop like

$ulSub.html('');

PUT fellow code

success: function(data) {
            if (data != ''){
                $ulSub = $("#firstList");
                $("#Pushtype_destinationList").val(crit1);
                $ulSub.html('');
                $.each(data.dataa, function (i,item) {
                $str="";
                for(var key in item){ if(key != 'id'){$str+= item[key]} }
                    $ulSub.append( '<li class="ui-widget-content " id="'+item.id +'" >' +$str+'</li>');

                });
            }
        }