'Default radio button option with jquery

I am trying to hide/show different divs using the method shown here.

<style>
    .box{
        color: #fff;
        padding: 20px;
        display: none;
        margin-top: 20px;
    }
    .red{ background: #ff0000; }
    .green{ background: #228B22; }
    .blue{ background: #0000ff; }
    label{ margin-right: 15px; }
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $('input[type="radio"]').click(function(){
        var inputValue = $(this).attr("value");
        var targetBox = $("." + inputValue);
        $(".box").not(targetBox).hide();
        $(targetBox).show();
    });
});
</script>
</head>
<body>
    <div>
        <label><input type="radio" name="colorRadio" value="red" checked = "checked"> red</label>
        <label><input type="radio" name="colorRadio" value="green"> green</label>
        <label><input type="radio" name="colorRadio" value="blue"> blue</label>
    </div>
    <div class="red box">You have selected <strong>red radio button</strong> so i am here</div>
    <div class="green box">You have selected <strong>green radio button</strong> so i am here</div>
    <div class="blue box">You have selected <strong>blue radio button</strong> so i am here</div>
</body>

I would like to have the red button clicked by default when the page loads. However if I just change the label to this:

<label><input type="radio" name="colorRadio" value="red" checked = "checked"> red</label>

It shows as clicked:

but I have to click it again to actually load the red div:

Is there an elegant way to fix that so it is showing the red div when the page loads?

Thanks a lot, Alex

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'Default radio button option with jquery

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