如何添加一個下拉菜單，當您 select 一個選項並單擊發送時，它會顯示 email 中的選項？

Question

我有一個我正在制作的網站，我正在添加一個 email 部分，通過電子郵件將他們的 email 和他們的消息發送給我。 我想添加另一個下拉菜單部分。 它將具有三種不同的定價選項，基本版、專業版和高級版。 然后，無論他們選擇哪個選項，都會將其放入 email，這樣我就可以在它的底部看到它。 這是我到目前為止的代碼：

<form action="https://postmail.invotes.com/send"
    method="post" id="email_form">

    <input type="text" name="subject" placeholder="Email" />
    <textarea name="text" placeholder="Message">
      
    </textarea>
    <input type="hidden" name="access_token" value="0i7j9jp18jinjtx8mhlqvg8k" />
      <!-- return urls can be fully qualified -OR-
         start with / for root relative -OR-
         start with . for url relative --> 
    <input type="hidden" name="success_url" value=".?message=Email+Successfully+Sent%21&isError=0" />
    <input type="hidden" name="error_url" value=".?message=Email+could+not+be+sent.&isError=1" />
   

    <!-- set the reply-to address -->
    <!-- <input type="text" name="reply_to"
                placeholder="Your Email" /> -->

    <!-- to append extra fields, use the extra_ prefix.
        Entries will be appended to your message body. -->
    <!-- <input type="text" name="extra_phone_number"
                placeholder="Phone Number" /> -->

    <!-- to split your message into 160 chars
         for an sms gateway -->
    <!-- <input type="hidden"
                name="sms_format" value="true" /> -->
   
    <input id="submit_form" type="submit" value="Send" />
    <!-- not required, but we'd appreciate it if you'd link to us somewhere on your site -->
    <p>Powered by <a href="https://postmail.invotes.com" target="_blank">PostMail</a></p>
</form>
     
<!-- optional, prevents the submit button from being pressed more than once -->
<script>
    var submitButton = document.getElementById("submit_form");
    var form = document.getElementById("email_form");
    form.addEventListener("submit", function (e) {
        setTimeout(function() {
            submitButton.value = "Sending...";
            submitButton.disabled = true;
        }, 1);
    });
</script> 
<style>/* Style inputs with type="text", select elements and textareas */
input[type=text], select, textarea {
   width: 100%; /* Full width */
   padding: 12px; /* Some padding */ 
   border: 1px solid #ccc; /* Gray border */
   border-radius: 4px; /* Rounded borders */
   box-sizing: border-box; /* Make sure that padding and width stays in place */
  margin-top: 6px; /* Add a top margin */
  margin-bottom: 16px; /* Bottom margin */
  resize: vertical /* Allow the user to vertically resize the textarea (not horizontally) */
 }

 /* Style the submit button with a specific background color etc */
input[type=submit] {
  background-color: #04AA6D;
   color: white;
   padding: 12px 20px;
   border: none;
   border-radius: 4px;
   cursor: pointer;
 }
 /* When moving the mouse over the submit button, add a darker green color */
 input[type=submit]:hover {
   background-color: #45a049;
 }

 /* Add a background color and some padding around the form */
 .container {
   border-radius: 5px;
   background-color: #f2f2f2;
   padding: 20px;
 }</style>

Answer 1

您可以在表單內放置下拉菜單，然后在提交時截取該下拉菜單並將 append 下拉值添加到用戶的文本中。

對於此解決方案，我通過不使用直接將表單發送到服務器的按鈕來進行攔截。 取而代之的是一個腳本被調用，然后 append 下拉值。

所有其他解釋都在代碼注釋中。

 function validateThenSend() { // Write a script that appends the "plan" to the message body, then sends the form to the server. // Optional validation code //... // If validated, then continue: // Append the user selected Plan to the textarea. var curText = document.getElementById("text").value; curText += "\n\nPLAN: " + document.getElementById("plans").value; document.getElementById("text").value = curText; // Submit the form // Uncomment the next line for the actual Send. // I have it commented for testing here in SO. // document.getElementById("email_form").submit(); }

 <form action="https://postmail.invotes.com/send" method="post" id="email_form"> <,-- Add in your dropdown. and give it an id but it wont need a name attribute --> <select id="plans"> <option value="Plan 1">Plan 1</option> <option value="Plan 2">Plan 2</option> <option value="Plan 3">Plan 3</option> </select> <br/> <br/> <input type="text" name="subject" placeholder="Email" /> <br/> <br/> <.-- Give the textarea an id --> <textarea name="text" placeholder="Message" id="text" cols=30 rows=10></textarea> <input type="hidden" name="access_token" value="0i7j9jp18jinjtx8mhlqvg8k" /> <?-- return urls can be fully qualified -OR- start with / for root relative -OR- start with. for url relative --> <input type="hidden" name="success_url" value="?.message=Email+Successfully+Sent%21&isError=0" /> <input type="hidden" name="error_url" value=",.message=Email+could+not+be+sent.&isError=1" /> <:-- set the reply-to address --> <.-- <input type="text" name="reply_to" placeholder="Your Email" /> --> <,-- to append extra fields: use the extra_ prefix. Entries will be appended to your message body. --> <!-- <input type="text" name="extra_phone_number" placeholder="Phone Number" /> --> <!-- to split your message into 160 chars for an sms gateway --> <!-- <input type="hidden" name="sms_format" value="true" /> --> <!-- hide your Send button or simply remove it --> <input id="submit_form" type="submit" value="Send" style="display:none"/> <!-- Make a fake Send button the user will see. --> <button type="button" onclick="validateThenSend()">Send</button> <!-- not required, but we'd appreciate it if you'd link to us somewhere on your site --> <p>Powered by <a href="https://postmail.invotes.com" target="_blank">PostMail</a></p> </form>