Prototype - 表單請求() 方法

此方法是一種便捷的方式，用於透過Ajax.Request將表單序列化並提交到表單操作屬性的URL。options引數傳遞給Ajax.Request例項，允許覆蓋HTTP方法並指定附加引數。

傳遞給request()的選項將與底層的Ajax.Request選項智慧地合併：

如果表單具有method屬性，則其值將用於Ajax.Request method選項。如果將method選項傳遞給request()，則它優先於表單的method屬性。如果兩者都沒有指定，則method預設為“POST”。
在parameters選項中指定的鍵值對（作為雜湊或查詢字串）將與序列化表單引數合併（並優先於它們）。

語法

formElement.request([options]);

返回值

它返回一個新的Ajax.Request。

示例1

考慮以下示例：

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function postIt() {
            var form = $('example'); 
            form.request(); //done - it's posted
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />

      <form id = "example" action = "#" onsubmit = "return false">
         <fieldset>
            <legend>User info</legend>
            <div>
               <label for = "username">Username:</label> 
               <input name = "username" id = "username" value = "Sulien" type = "text">
            </div>
            <div><label for = "age">Age:</label> 
               <input name = "age" id = "age" value = "23" size = "3" type = "text">
            </div>
            <div>
               <label for = "hobbies">Your hobbies are:</label>
               <select name = "hobbies" id = "hobbies" multiple = "multiple">
                  <option>coding</option>
                  <option>swimming</option>
                  <option>hiking</option>
                  <option>drawing</option>
               </select>
            </div>
         </fieldset>
      </form>
      <br />
      
      <input type = "button" value = "Post It" onclick = "postIt();"/>
   </body>
</html>

輸出

示例2

可能還有另一個示例，您可以在回撥函式中執行某些操作：

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function postIt() {
            var form = $('example'); 
            form.request({
               onComplete: function() { alert('Form data saved!') }
            })
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />

      <form id = "example" action = "#" onsubmit = "return false">
         <fieldset>
            <legend>User info</legend>
            <div>
               <label for = "username">Username:</label> 
               <input name = "username" id = "username" value = "Sulien" type = "text">
            </div>
            <div>
               <label for = "age">Age:</label> 
               <input name = "age" id = "age" value = "23" size = "3" type = "text">
            </div>
            <div>
               <label for = "hobbies">Your hobbies are:</label>
               <select name = "hobbies" id = "hobbies" multiple = "multiple">
                  <option>coding</option>
                  <option>swimming</option>
                  <option>hiking</option>
                  <option>drawing</option>
               </select>
            </div>
         </fieldset>
      </form>
      <br />
      
      <input type = "button" value = "Post It" onclick = "postIt();"/>
   </body>
</html>

輸出

示例3

這是一個更進一步的示例，展示瞭如何透過在選項中簡單地使用method和parameters來覆蓋HTTP方法並新增一些引數。在這個示例中，我們將方法設定為GET，並設定兩個固定引數：interests和hobbies。後者已存在於表單中，但此值將優先。

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function postIt() {
            var form = $('example'); 
            form.request({
               method: 'get',
               
               parameters: { 
                  interests:'JavaScript', 
                  'hobbies[]':['programming', 'music'] 
               },
               onComplete: function() { alert('Form data saved!') }
            })
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />

      <form id = "example" action = "#" onsubmit = "return false">
         <fieldset>
            <legend>User info</legend>
            <div>
               <label for = "username">Username:</label> 
               <input name = "username" id = "username" value = "Sulien" type = "text">
            </div>
            <div>
               <label for = "age">Age:</label> 
               <input name = "age" id = "age" value = "23" size = "3" type = "text">
            </div>
            <div>
               <label for = "hobbies">Your hobbies are:</label>
               <select name = "hobbies[]" id = "hobbies" multiple = "multiple">
                  <option>coding</option>
                  <option>swimming</option>
                  <option>hiking</option>
                  <option>drawing</option>
               </select>
            </div>
         </fieldset>
      </form>
      <br />
      
      <input type = "button" value = "Post It" onclick = "postIt();"/>
   </body>
</html>

輸出

prototype_form_management.htm

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