jquery - codeigniter image resize not changing without page refresh -


i'm trying crop image via ajax. after ajax call, checked target file directory, , image file cropped expected. when try show file using $('#upload_cover').css('background-image', 'url('+res.img_src+')');, file shown before cropped. if refresh page , put same file path, shows cropped image.

why that? how can show image after cropped without refreshing page?

this code:

the ajax call:

var formdata = $(this).closest('form').serializearray(); console.log('formdata', formdata); $.ajax({     url: '/uploader/resize_img',     type: 'post',     data: formdata,     datatype: 'json',     success: function(res) {         console.log('success resize img', res);         $('#upload_cover').css('background-image', "url("+res.img_src+")");     },     error: function(err) {         console.log('error resize img', err.responsetext);     } });

console.log('formdata', formdata):

0 : {name: "csrftokengotravelly", value: "somerandomhash"} 1 : {name: "x_axis", value: "29"} 2 : {name: "y_axis", value: "50.5"} 3 : {name: "width", value: "154"} 4 : {name: "height", value: "149"} 5 : {name: "rotate", value: "0"} 6 : {name: "scalex", value: "1"} 7 : {name: "scaley", value: "1"} 8 : {name: "img_src", value: "/assets/img/user/ca6f717ab7d023224229ff0d12f2344d.jpg"}

php function resize image:

public function resize_img() {     if ( ! $this->input->is_ajax_request())     {         show_404();     }      $result = array(         'status' => 0,         'message' => '',     );      $this->load->library('image_lib');      try     {         $config['image_library'] = 'gd2';          $x_axis = $this->input->post('x_axis');         $y_axis = $this->input->post('y_axis');         $width = $this->input->post('width');         $height = $this->input->post('height');         $rotate = $this->input->post('rotate');         $scalex = $this->input->post('scalex');         $scaley = $this->input->post('scaley');         $img_src = $this->input->post('img_src');          if (empty($img_src) || !file_exists('.'.$img_src))         {             throw new exception('source image file not found.');         }         $config['source_image'] = '.'.$img_src;          if ($x_axis)         {             $config['x_axis'] = (int)$x_axis;         }         if ($y_axis)         {             $config['y_axis'] = (int)$y_axis;         }         if ($width)         {             $config['width'] = (int)$width;         }         if ($height)         {             $config['height'] = (int)$height;         }          $this->image_lib->clear();         $this->image_lib->initialize($config);          if ( ! empty($config['rotate']))         {             if ( ! $this->image_lib->rotate())             {                 throw new exception("failed processing image file. ".$this->image_lib->display_errors());             }             $result['message'] .= "image rotated successfully. ";         }          if ($x_axis && $y_axis && $width && $height)         {             if ( ! $this->image_lib->crop())             {                 throw new exception("failed processing image file. ".$this->image_lib->display_errors());             }             $result['message'] .= "image cropped successfully. ";         }          $result['status'] = 1;          $result['img_src'] = $img_src;         $pos = strrpos($config['source_image'], '/');         $result['filename'] = substr($config['source_image'], $pos+1); // abc123.jpg     }     catch (exception $e)     {         $result['message'] = $e->getmessage();     }      echo json_encode($result); } // end public function resize_img($params)


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