Question

我如何将输入类型ID“电子邮件”中的值放入警报框？
我认为其余的代码可以正常工作，我无法使警报框显示我的电子邮件表单中的值。
也使用引导程序进行一些很酷的设计。

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <title>Hello, world!</title>
  </head>
  <body>
   <div class="container">
      <div class="box">
<form class="text-center border border-light p-5">

    <p class="h4 mb-4">CHANGE E-MAIL</p>

    <p>Input Old E-mail and New E-mal</p>
    <!-- Name -->
    <input type="email" id="email1" class="form-control mb-4" placeholder="E-mail">

    <!-- Email -->
    <input type="email" name="email" id="email" class="form-control mb-4" placeholder="E-mail">

    <!-- Sign in button -->
    <button class="btn btn-dark btn-block" id="tombol_form" type="submit" onclick = "check();">SUBMIT</button>
</form>
</div>
      </div>       
      </div>
  </div>

    <!-- Optional JavaScript -->
    <script type="text/javascript">
        var email=document.getElementById("email").value;

      function check() {
        alert ("Success your email change to: " +email)
       
      
        }
    </script>
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

Answer 1

您只需要在check函数中获取输入值，否则，它是在网站加载时获得的，而不是在单击按钮时获得的。

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <title>Hello, world!</title>
  </head>
  <body>
   <div class="container">
      <div class="box">
<form class="text-center border border-light p-5">

    <p class="h4 mb-4">CHANGE E-MAIL</p>

    <p>Input Old E-mail and New E-mal</p>
    <!-- Name -->
    <input type="email" id="email1" class="form-control mb-4" placeholder="E-mail">

    <!-- Email -->
    <input type="email" name="email" id="email" class="form-control mb-4" placeholder="E-mail">

    <!-- Sign in button -->
    <button class="btn btn-dark btn-block" id="tombol_form" type="submit" onclick = "check();">SUBMIT</button>
</form>
</div>
      </div>       
      </div>
  </div>

    <!-- Optional JavaScript -->
    <script type="text/javascript">
        

      function check() {
        var email=document.getElementById("email").value; //Moved this into the 'check'-function
        alert ("Success your email change to: " +email)     
      }
    </script>
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

将输入值添加到警报对话框

1 个答案: