html - jquery appending value to input field -

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i'm trying add dynamically 1 input field values jquery. passed value won't appended target. code looks follows 

//on click popup modal form     $(document).on('click', '#form', function(e) {         e.preventdefault();                   $('<div></div>').load($(this).attr('href')).dialog({             title: $(this).attr('title'),             //autoopen: false,             modal: true,                         draggable: true,             width:900,             position: ['top',50],              close: function(event, ui)              {                  $(this).dialog('destroy').remove()             }          }); //this value should appended 1 of input field, value exists on alert not getting appended         $('input#inputprepend cashback').val( $(this).closest('tr').children('td.cashback').text() );      });

notes:

//this value picked jquery datatable clicked row $(this).closest('tr').children('td.cashback').text() //this input field getting created inside of modal $('input#inputprepend cashback')

html

 <div class="formrow fluid">           <span class="grid12">       <span class="grid2"><label class="form">cashback</label></span>       <span class="grid3">         <div class="input-prepend">            <span class="add-on">€</span>               <input style="width:120px;height:30px; position relative; top:-10px"type="text"  id="inputprepend cashback" type="text"  readonly="readonly" value="" />         </div>     </span>     </span>                 </div>

in example:

$('input#inputprepend cashback').val( $(this).closest('tr').children('td.cashback').text() );

$(this) refers document, not $('input#inputprepend cashback')

you can use instead:

var $input =  $('input#inputprepend cashback'); $input.val( $input.closest('tr').children('td.cashback').text() );

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