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Jquery select change

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攒了一身酷
攒了一身酷 2021-02-19 08:12
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  • 生来不讨喜
    2021-02-19 08:35

    The 2nd alert will return null, because <select> has no attribute prefix.

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  • 粉色の甜心
    2021-02-19 08:41

    What is it you are expecting exactly?

    I find that the second alert - alert( $(this).attr('prefix') ); is the one causing a problem. As is, you get an alert of the prefix number, then an alert of null (caused by the second alert).

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  • 悲&欢浪女
    2021-02-19 08:55

    In your code, $(this) refers to the <select>, not the option. The prefix attribute does not exist on the <select>

    This will cause the problem with the second example.

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  • 清酒与你
    2021-02-19 08:56

    You probably wanted .val() not .attr('prefix'), to obtain selected value of <select>.

    $(document).ready(function() {  
    $('#Nazione').change(function(){

        alert( $(this).find("option:selected").attr('prefix') );
        alert( $(this).val('prefix') );
    });
  });
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