Dynamically get radio button group name using jQue

2020-08-13 06:07发布

问题:

I would like to ask if there is a way to get a radio button group name dynamically i.e. optimize the following 2 click functions into one by having [name=some_variable].

I tried:

$('input:radio').click(function() {
    alert($('input:radio:checked').attr('name'));
});

but it always returns me the name of the first radio button group clicked.

$(document).ready(function(){
    $('input:radio[name=q1]').click(function() {
        var ans1 = $('input[name=q1]:radio:checked').val();
        getUserAnswer(1, ans1);
    });

    $('input:radio[name=q2]').click(function() {
        var ans2 = $('input[name=q2]:radio:checked').val();                 
        getUserAnswer(2, ans2);
    });                             
});

<body>
    <ol>
        <li><p>Q1<br />
            <input type="radio" id="q1A" name="q1" value="A" />Q1 A<br />
            <input type="radio" id="q1B" name="q1" value="B" />Q1 B<br />
            <input type="radio" id="q1C" name="q1" value="C" />Q1 C<br />
            <input type="radio" id="q1D" name="q1" value="D" />Q1 D<br />
        </p></li>
        <li><p>Q2<br />
            <input type="radio" id="q2A" name="q2" value="A" />Q2 A<br />
            <input type="radio" id="q2B" name="q2" value="B" />Q2 B<br />
            <input type="radio" id="q2C" name="q2" value="C" />Q2 C<br />
            <input type="radio" id="q2D" name="q2" value="D" />Q2 D<br />           
        </p></li>
    </ol>
</body>

回答1:

$('input:radio').click(function() { 
  console.log($(this).attr('name')); 
});

You are selecting new set of elements on click, but you need the attr of the current element so, you need to refer to it with 'this'

回答2:

Something like the following should work:

$('input').click(function() {
    var thisName = $(this).attr('name');
    var qNum = thisName.substring(1);
    var ans2 = $('input[name=' + thisName + ']:radio:checked').val();
    getUserAnswer(thisName, ans2);
});