j查询克隆表单在同一页面中不起作用两次

jQuery clone form not working twice in the same page

本文关键字：不起作用 两次 一页 查询 表单      更新时间：2023-09-26

我正在尝试在同一页面中两次使用相同的表单，表单工作一次但不是两次，我认为问题出在 id 或其他方面，但我不确定我不太擅长 JavaScript

感谢帮助。

<!DOCTYPE html>
<html>
<head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

    <script>


    $(function () {
    $('#btnAdd').click(function () {
        var num     = $('.clonedInput').length, // Checks to see how many "duplicatable" input fields we currently have
            newNum  = new Number(num + 1),      // The numeric ID of the new input field being added, increasing by 1 each time
            newElem = $('#entry' + num).clone().attr('id', 'entry' + newNum).fadeIn('slow'); // create the new element via clone(), and manipulate it's ID using newNum value

        // H2 - section
        newElem.find('.heading-reference').attr('id', 'ID' + newNum + '_reference').attr('name', 'ID' + newNum + '_reference').html('Entry #' + newNum);
        // Title - select
        newElem.find('.label_ttl').attr('for', 'ID' + newNum + '_title');
        newElem.find('.select_ttl').attr('id', 'ID' + newNum + '_title').attr('name', 'ID' + newNum + '_title').val('');
        // First name - text
        newElem.find('.label_fn').attr('for', 'ID' + newNum + '_first_name');
        newElem.find('.input_fn').attr('id', 'ID' + newNum + '_first_name').attr('name', 'ID' + newNum + '_first_name').val('');


    // Insert the new element after the last "duplicatable" input field
        $('#entry' + num).after(newElem);
        $('#ID' + newNum + '_title').focus();
    // Enable the "remove" button. This only shows once you have a duplicated section.
        $('#btnDel').attr('disabled', false);
    // Right now you can only add 4 sections, for a total of 5. Change '5' below to the max number of sections you want to allow.
        if (newNum == 5)
        $('#btnAdd').attr('disabled', true).prop('value', "You've reached the limit"); // value here updates the text in the 'add' button when the limit is reached 
    });
    $('#btnDel').click(function () {
    // Confirmation dialog box. Works on all desktop browsers and iPhone.
        if (confirm("Are you sure you wish to remove this section? This cannot be undone."))
            {
                var num = $('.clonedInput').length;
                // how many "duplicatable" input fields we currently have
                $('#entry' + num).slideUp('slow', function () {$(this).remove();
                // if only one element remains, disable the "remove" button
                    if (num -1 === 1)
                $('#btnDel').attr('disabled', true);
                // enable the "add" button
                $('#btnAdd').attr('disabled', false).prop('value', "add section");});
            }
        return false; // Removes the last section you added
    });
    // Enable the "add" button
    $('#btnAdd').attr('disabled', false);
    // Disable the "remove" button
    $('#btnDel').attr('disabled', true);
});



    </script>
</head>
<body>
    <div id="wrapper">
    <div class="sign-up_box">
        <form action="#" method="post" id="sign-up_area">
            <div id="entry1" class="clonedInput">
                <h2 id="reference" name="reference" class="heading-reference">Entry #1</h2>

               <fieldset>
                    <label class="label_ln" for="last_name">Last name:</label>
                    <input class="input_ln" type="text" name="last_name" id="last_name" value="">
                </fieldset>
            </div><!-- end #entry1 -->
            <div id="addDelButtons">
                <input type="button" id="btnAdd" value="add section"> <input type="button" id="btnDel" value="remove section above">
            </div>


            <fieldset class="form-actions">
                <input type="submit" value="Submit">
            </fieldset>
        </form>
    </div><!-- end sign-up_box -->
  </div>



      <div id="wrapper">
    <div class="sign-up_box">
        <form action="#" method="post" id="sign-up_area">
            <div id="entry1" class="clonedInput">
                <h2 id="reference" name="reference" class="heading-reference">Entry #1</h2>

               <fieldset>
                    <label class="label_ln" for="last_name">Last name:</label>
                    <input class="input_ln" type="text" name="last_name" id="last_name" value="">
                </fieldset>
            </div><!-- end #entry1 -->
            <div id="addDelButtons">
                <input type="button" id="btnAdd" value="add section"> <input type="button" id="btnDel" value="remove section above">
            </div>


            <fieldset class="form-actions">
                <input type="submit" value="Submit">
            </fieldset>
        </form>
    </div><!-- end sign-up_box -->
  </div>



    </body>
</html>

Id 标签在 HTML 文档中必须是唯一的，否则它们将无法正常工作。您可能希望使用"class"而不是"id"，并使用jQuery类选择器来选择适当的字段，具体取决于您要执行的操作。

以下是一些与此相关的现有StackOverflow问题：

在多个 HTML 标记中使用相同的 ID？

具有相同 ID 的多个元素响应一个 CSS ID 选择器

JavaScript 重复 ID 冲突

您不能简单地克隆具有 id 属性的元素。任何单个页面上都不能有两个具有相同 id 的元素。因此，请相应地更改克隆元素的 ids，以及在代码中对它们的引用。

相关文章：