Question

我目前有两个下拉框，我想知道是否有人可以协助如何在用户按下按钮后将两个输出值合并为一个句子。

这是我目前正在使用的代码：

＆＃13;

<!DOCTYPE html>
<html>
    <body>

        <form action="action_page.php">
            <select id="selectcars" name="cars">
                <option value="volvo" selected>Volvo</option>
                <option value="saab">Saab</option>
                <option value="fiat">Fiat</option>
                <option value="audi">Audi</option>
            </select>
        </form>
        <div class="text-for-car" id="volvo">Your text for "Volvo"</div>
        <div class="text-for-car" id="saab">Your text for "Saab"</div>
        <div class="text-for-car" id="fiat">Your text for "Fiat"</div>
        <div class="text-for-car" id="audi">Your text for "Audi"</div>
        <style>
            .text-for-car {display: none;}
            #volvo {display: block;}
        </style>
        <script>
            document.getElementById("selectcars").addEventListener("change", function () {
                var id = this.options[this.selectedIndex].value;
                var texts = document.getElementsByClassName("text-for-car");
                for (var i = 0; i < texts.length; i++) {
                if (texts[i].id == id) texts[i].style.display = "block";
                else texts[i].style.display = "none";
                }
            })
        </script>
        <form>
            <select id="selectcars2" name="cars2">
                <option value="volvo2" selected>Volvo</option>
                <option value="saab2">Saab</option>
                <option value="fiat2">Fiat</option>
                <option value="audi2">Audi</option>
            </select>
        </form>
        <div class="text-for-car2" id="volvo2">Your text for "Volvo"</div>
        <div class="text-for-car2" id="saab2">Your text for "Saab"</div>
        <div class="text-for-car2" id="fiat2">Your text for "Fiat"</div>
        <div class="text-for-car2" id="audi2">Your text for "Audi"</div>
        <style>
            .text-for-car2 {display: none;}
            #volvo2 {display: block;}
        </style>
        <script>
            document.getElementById("selectcars2").addEventListener("change", function () {
                var id2 = this.options[this.selectedIndex].value;
                var texts2 = document.getElementsByClassName("text-for-car2");
                for (var i = 0; i < texts2.length; i++) {
                if (texts2[i].id == id2) texts2[i].style.display = "block";
                else texts2[i].style.display = "none";
                }
            })
        </script>
    </body>
</html>

＆＃13;

有任何帮助吗？提前谢谢！

Answer 1

您的演示有点长，我不想将所有内容分开，但我在那里做了一个快速演示，可以帮助您解决问题。

http://codepen.io/paulcredmond/pen/JRxqPG

<label for="car">Car</label>
<select id="car">
  <option value="Ford">Ford</option>
  <option value="Fiat">Fiat</option>
  <option value="Volvo">Volvo</option>
</select>

<label for="engine">Engine</label>
<select id="engine">
  <option value="1.4 Petrol">1.4 Petrol</option>
  <option value="1.6 Petrol">1.6 Petrol</option>
  <option value="2.0 TDI">2.0 TDI</option>
</select>

<p>You have chosen a <span class="car">Ford </span> with a <span class="engine">1.4 Petrol</span> engine.</p>

$('#car').on('change', function() {
  var s = $(this).val();
  console.log(s);
  $('p .car').text(s);
});

$('#engine').on('change', function() {
  var s = $(this).val();
  console.log(s);
  $('p .engine').text(s);
});

带按钮的多个下拉菜单

1 个答案: