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

Try a simple way:

if($('input[readonly="readonly"]')){
   alert("foo");
}

Answer 2

You can just use the attribute selector and then test the length:

$('input[readonly]').length == 0 // --> ok
$('input[readonly]').length > 0  // --> not ok