How I can add and remove the attribute “readonly”?

Question

$(document).ready(function() {
  //Check City Value
  var city_value = parseInt($(\"#city\").val());
  if( city_value == 0) {
     $(\"#state\").attr(\"readonly\", true)         


        

Answer 1

While the readonly property takes a boolean value, the readonly attribute takes a string value. You should use the code that you have commented out:

$("#rate").attr("readonly", "readonly");