使用jquery或javascript单击按键上的按钮

Question

I am developing a shopping cart using codeigniter. In my cart page I need to update my cart on change in quantity of the item. I am getting the results with the help of button click. But my issue is that I need to get the same result on my key up. For that on key up corresponding button should be clicked

View page

    <td>
     <?php echo form_input(array('name' => $items['rowid']."_qty",'id' => $items['rowid']."_qty", 'value' => $items['qty'], 'maxlength' => '3', 'size' => '5'));  ?>
<button class="btn btn-success " id= "<?php echo $items['rowid']."_qty" ?>" onclick="update_cart('<?=$items['rowid'];?>')" >update</button>
 <script>
  $("#<?php echo $items['rowid']."_qty" ?>").keyup(function(event){

     $("#<?php echo $items['rowid']."_qty" ?>").click();

      });
       </script>
    </td>

Script for update cart

function update_cart(itemid)
{ 
  var qty= document.getElementById(itemid+"_qty").value;
        $.ajax({
            type: 'POST',
            url: '<?php echo site_url("ajax_controller1/update_cart/'+itemid+'/'+qty+'")?>',
            data: { id:itemid }, 
            success:function(response){
              $("#shoppingcart_container").html(response);
$(".total").click();

     }
  });

} 

I just need to click currosponding button on change in quantity input field This is my Demo URL My website link

Answer 1

No need to add extra code to trigger click event. You can directly put update_cart with your form_input as

<?php 
    echo form_input(array(
            'name' => $items['rowid']."_qty",
            'id' => $items['rowid']."_qty", 
            'value' => $items['qty'], 
            'maxlength' => '3', 
            'size' => '5',
            'onkeyup' => "update_cart('".$items['rowid']."')"
        )
    );  
?>

Replace <td> tag with above code and try