Detect when input has a 'readonly' attribute

Question

I want to throw an alert when an input has a \'readonly\' attribute. I have tried this:

  if($(\'input\').attr(\'readonly\') == \'readonly\'){

    alert(\"foo\"         


        

Answer 1

Since JQuery 1.6, always use .prop() Read why here: http://api.jquery.com/prop/

if($('input').prop('readonly')){ }

.prop() can also be used to set the property

$('input').prop('readonly',true);

$('input').prop('readonly',false);