Select next/prev radio button with external button

问题

I'm making a sort of slideshow form, and when user click's the next image slides in, but also the radio button must be selected. I got the sliding working, and the 'next button' is working as well, but I'm kinda stuck with the 'prev' button. Don't see why it doesn't work.

(fiddle)

This is what I got so far, HTML:

<form>
<div>
    <div class="button prev">&#60;</div>
    <ul>
        <li>
            <input type="radio" id="choise_1" name="first_choise" checked="checked"/>
            <label for="choise_1">One</label>
        </li>
        <li>
            <input type="radio" id="choise_2" name="first_choise"/>
            <label for="choise_2">Two</label>
        </li>
        <li>
            <input type="radio" id="choise_3" name="first_choise"/>
            <label for="choise_3">Three</label>
        </li>
    </ul>
    <div class="button next">&#62;</div>
</div>
<div>
    <div class="button prev">&#60;</div>
    <ul>
        <li>
            <input type="radio" id="choise_1" name="second_choise" checked="checked"/>
            <label for="choise_1">One</label>
        </li>
        <li>
            <input type="radio" id="choise_2" name="second_choise"/>
            <label for="choise_2">Two</label>
        </li>
        <li>
            <input type="radio" id="choise_3" name="second_choise"/>
            <label for="choise_3">Three</label>
        </li>
    </ul>
    <div class="button next">&#62;</div>
</div></form>

jQuery:

$(document).ready(function(){
$('.prev').click(function(){
    $(this).next().find('input:checked').parent().prev().children('input').attr("checked", true);
    $(this).next().find('input:checked').last().removeAttr("checked");
});

$('.next').click(function(){
    $(this).prev().find('input:checked').parent().next().children('input').attr("checked", true);
    $(this).prev().find('input:checked').eq(0).parent().prev().children('input').removeAttr("checked");
});});

回答1:

It can be simplified to

$(document).ready(function(){
    $('.prev').click(function(){
        $(this).parent().find('input:checked').parent().prev().children('input').prop("checked", true);
    });

    $('.next').click(function(){
        $(this).parent().find('input:checked').parent().next().children('input').prop("checked", true);
    });
});

Demo: Fiddle

Same using :has-selector

$(document).ready(function(){
    $('.prev').click(function(){
        $(this).parent().find('li:has(input:checked)').prev().children('input').prop("checked", true);
    });

    $('.next').click(function(){
        $(this).parent().find('li:has(input:checked)').next().children('input').prop("checked", true);
    });
});

Demo: Fiddle

回答2:

You can use .prop() instead of .attr() and you can simplify to this:

$(document).ready(function(){
   $('.prev').click(function(){
      $(this).next().find(':checked').parent().prev().find('input').prop("checked", true);
   });

   $('.next').click(function(){
      $(this).prev().find(':checked').parent().next().find('input').prop("checked", true);
   });
});

来源：https://stackoverflow.com/questions/22683322/select-next-prev-radio-button-with-external-button

标签

jquery

html

radio-button