javascript - Modify the style of the selected radio option

Question

Modify the style of the selected single option, but after adding the style, the modified option style still exists, that is, two selected styles appear at the same time. The following is my code. How should you modify it?

<p class="choice">
                            <label>
                                <input type="radio" class="a" name="1"><span class="aFont">aaaaa</span>
                            </label>
                            <label>
                                <input type="radio" class="b" name="1"><span class="bFont">bbbbb</span>
                            </label>
                            <label>
                                <input type="radio" class="c" name="1"><span class="cFont">ccccc</span>
                            </label>
                            <label>
                                <input type="radio" class="d" name="1"><span class="dFont">ddddd</span>
                            </label>
                        </p>
<script>
        $(document).ready(function(){
            $(".choice input[type = 'radio']").on("click",function(){
                if ($(".choice input:checked")){
                    $(this).siblings().css("background","red");
                }
            });
        });
</script>

Answer 1

    <p class="choice">
        <label>
            <input type="radio" class="a" name="1"><span class="aFont">aaaaa</span>
        </label>
        <label>
            <input type="radio" class="b" name="1"><span class="bFont">bbbbb</span>
        </label>
        <label>
            <input type="radio" class="c" name="1"><span class="cFont">ccccc</span>
        </label>
        <label>
            <input type="radio" class="d" name="1"><span class="dFont">ddddd</span>
        </label>
    </p>
<script>
        $(document).ready(function(){
            $(".choice input[type = 'radio']").on("click",function(){
                if ($(".choice input:checked")){
                    $(this).parent().css("background" , "green").siblings().css("background","red");
                }
            });
        });
</script>

The one you selected is input, not label. Note $(this).parent().css("background","green").siblings()

Answer 2

The code has not been tested. The idea is to remove all background colors first, and then add a background color to the clicked one. Your if judgment is not needed

<script>
        $(document).ready(function(){
            $(".choice input[type = 'radio']").on("click",function(){
                   $(".choice input[type = 'radio']").css("background","");
                   $(this).css("background","red");
            });
        });
</script>