根据另一个表单域预先填充值HTML表单输入(单选按钮)

<input type="radio" name="option" value="option1"> Option 1
<input type="radio" name="option" value="option2"> Option 2
<input type="radio" name="option" value="option3"> Option 3

<input type="text" name="input1" id="input1" value="">

<script>
    var option1 = "预先填充的值1";
    var option2 = "预先填充的值2";
    var option3 = "预先填充的值3";

    var input1 = document.getElementById("input1");

    document.getElementsByName("option").forEach(function(radio) {
        radio.addEventListener("change", function() {
            if (this.value === "option1") {
                input1.value = option1;
            } else if (this.value === "option2") {
                input1.value = option2;
            } else if (this.value === "option3") {
                input1.value = option3;
            }
        });
    });
</script>