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How to validate file is selected or not on ajax processed jquery validation

I am trying to do jquery validation on file upload for file is select or not. I want when user click on upload before submit check file is selected or not. if not stop ajax request. Any Idea to validate it?

$videoForm['profile_photos']['images']['field_photo'] = array(     '#parents' => array('video', 'field_photo'),     '#id' => 'field_photo',     '#type' => 'managed_file',     '#title' => 'Photo <em>(optional)</em>',     '#field_name' => 'field_photo',     '#process' => array(     'm_customer_profile_image_remove',     'm_customer_profile_image_upload',               'file_managed_file_process',         'customer_profile_image_preview',     ),     '#upload_location' => 'public://' . $user->uid,     '#limit_validation_errors' => array(array('video', 'field_photo')),     '#upload_validators' => array(         'file_validate_size' => array(64*1024*1024),         'file_validate_extensions' => array('gif jpeg jpg png')     ) );
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How to validate file is selected or not on ajax processed jquery validation

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