javascript - How to disable <select> based on other <select> on Select2.js -


i'm having little trouble disabling "select" input.

i need disable "cidade" whenever nothing selected on "estado".

here's code: 

<select id="estado" class="select_customized">     <option></option>     <option value="sp">são paulo</option>     <option value="mg">minas gerais</option>     <option value="rj">rio de janeiro</option>  </select>  <select id="cidade" class="select_customized">      <option></option>      <option value="sao-paulo">são paulo</option>      <option value="minas-gerais">minas gerais</option>      <option value="rio-de-janeiro">rio de janeiro</option>  </select>

and here's script i'm using: 

$("#cidade").select2("enable", false);       $("#estado").on('change',function(){      var is_empty = $('#estado').is(":empty");          if(is_empty){              $("#cidade").select2("enable", false);           }          else {              $("#cidade").select2("enable", true);           }      });

this kinda works, whenever choose on "estado" input, , clear again, "cidade" not disable again... suggestions?

you want use select2 call check if selection box empty, instead of going original #estado box created (since hidden select2).

your call:

var is_empty = $('#estado').is(":empty");

then can changed like:

var is_empty = $('#estado').select2("val") == "";

and did job me. note actual comparison above differ bit depending on example if using multi-valued selection box.


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