基于单选按钮选择的运行总平均值

Question

我正在尝试根据用户的单选按钮选择获得运行总平均值（实时显示在我的跨度中），但我不确定如何在 javascript 中完成此操作。

看看我到目前为止所拥有的：

<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=1>never
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=2>sometimes
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=3>regularly
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=4>always
    <br>
</form>
<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onchange="getAverage()"  value=1>never
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=2>sometimes
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=3>regularly
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=4>always
    <br>
</form>
<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=1>never
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=2>sometimes
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=3>regularly
    <input type="radio" class="check" name="choose" onchange="getAverage()" value=4>always
    <br>
</form>

<br>
<div>Your average score is: <span id="score"></span></div>

<br>
<br>
<script>
    function getAverage() {
        var i;
        var total = 0;
        var value = document.querySelector('input[name="choose"]:checked').value;
        var count = document.querySelectorAll(".check:checked").length;

    }
</script>

Answer 1

 var btns = document.querySelectorAll('input[name="choose"]'); btns.forEach( function( btn) { btn.onclick = function () { var average = 0; btns.forEach( function( btn ) { average = btn.checked ? (average + parseInt(btn.value)): average; }); document.getElementById("score").innerText = average; } });

 <form> <p>Question here</p> <input type="radio" class="check" name="choose" value=1>never <input type="radio" class="check" name="choose" value=2>sometimes <input type="radio" class="check" name="choose" value=3>regularly <input type="radio" class="check" name="choose" value=4>always <br> </form> <form> <p>Question here</p> <input type="radio" class="check" name="choose" value=1>never <input type="radio" class="check" name="choose" value=2>sometimes <input type="radio" class="check" name="choose" value=3>regularly <input type="radio" class="check" name="choose" value=4>always <br> </form> <form> <p>Question here</p> <input type="radio" class="check" name="choose" value=1>never <input type="radio" class="check" name="choose" value=2>sometimes <input type="radio" class="check" name="choose" value=3>regularly <input type="radio" class="check" name="choose" value=4>always <br> </form> <br> <div>Your average score is: <span id="score"></span></div> <br> <br>

Answer 2

我假设您想在用户单击按钮时更新平均值。

<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=1>never
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=2>sometimes
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=3>regularly
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=4>always
    <br>
</form>
<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)"  value=1>never
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=2>sometimes
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=3>regularly
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=4>always
    <br>
</form>
<form>
    <p>Question here</p>
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=1>never
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=2>sometimes
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=3>regularly
    <input type="radio" class="check" name="choose" onclick="updateAverage(this)" value=4>always
    <br>
</form>

<br>
<div>Your average score is: <span id="score"></span></div>

<br>
<br>
<script>
    function averageTracker(display) {
        let counter = 0;
        let total = 0;
        return function(radioButton) {
            counter += 1;
            total += parseInt(radioButton.value);
            display.innerHTML = (total * 1.0) / counter;
        }
    }
    const updateAverage = averageTracker(document.getElementById("score"));
</script>

Answer 3

感谢您的回复，我解决了这个问题。 这是最终的 Javascript 代码。

      function getAverage() {
        var btns = document.querySelectorAll('input[name="choose"]');
        btns.forEach(function(btn) {
          btn.onclick = function() {
            var average = 0;
            btns.forEach(function(btn) {
              average = btn.checked ? average + parseInt(btn.value) : average;
            });
            var count = document.querySelectorAll(".check:checked").length;
            var totalAverage = average / count;
            document.getElementById("score").innerText = Math.round(
              totalAverage
            );
            var answer = document.getElementById("score").innerHTML;
          };
        });
      }