如何用克隆生成id并将其放入文本框的值

Question

请帮助解决这个问题，每次用户通过按下按钮克隆行时我都需要增加 id，现在克隆工作正常但是 id = 的问题，我需要为每个克隆生成新的 id 并将其放入文本框的值 "file id" 还要检查代码 here jsfiddle

<html>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.3.1.min.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>   
<script>
$(document).ready(function(){
$( ".add-row" ).click(function(){
    var $clone = $( "ul.personal-details" ).first().clone();
    $clone.append( "<button type='button' class='remove-row'>-</button>" );
    $clone.insertBefore( ".add-row" );
});
$( ".form-style-9" ).on("click", ".remove-row", function(){
    $(this).parent().remove();
});
});
</script>
</head>
<body>
<span class="form-style-9">
<ul class="personal-details">
    <table class="stretch" border="0">
        <tr>
            <td><label for="fname">File ID</label>
            <input name="fileid2[]" type="text" class="stretchnights" id="fileid2" value=""></td>       
<td>
<label for="fname">First Name</label>
<input  name="fname[]"  type="text" class="stretch" size="15"  maxlength="30" required >
            </td>
            <td>
                    <label for="lname">Last Name</label>
                    <input  name="lname[]"  type="text" class="stretch" size="15" maxlength="30" required  >
                </td>
           </tr>
    </table>
    </ul>
    <button type="button" class="add-row">+ New Client</button>
   <table width="25%" border="0"> <tr> <input type="submit" name="Submit" value="Insert"></tr></table>
  </span>
</body>
</html>

Answer 1

1st: select 使用 $clone.find('.stretchnights');

克隆中的输入

2nd: 每次点击addrow按钮时id加1 你需要在点击事件外设置一个变量 var id=0 把0改成任意数字需要从

开始

3rd: 使用 .attr('id' , newid) 更改输入 ID 并使用 .val(newid) 更改其值 你可以在只有一行

4th: 使用 id++

完成追加后将 id 加一

$(document).ready(function(){
  var id = 0;    // change 0 to the number you want to start with
  $( ".add-row" ).click(function(){
      var $clone = $( "ul.personal-details" ).first().clone();
      var $input = $clone.find('.stretchnights');
      $input.val('fileid'+id).attr('id' , 'fileid'+id)  // change fileid with any string you want 
      $clone.append( "<button type='button' class='remove-row'>-</button>" );
      $clone.insertBefore( ".add-row" );
      id++; // increase id by 1
  });
  $( ".form-style-9" ).on("click", ".remove-row", function(){
      $(this).parent().remove();
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span class="form-style-9">
<ul class="personal-details">
    <table class="stretch" border="0">
        <tr>
            <td><label for="fname">File ID</label>
            <input name="fileid2[]" type="text" class="stretchnights" id="fileid2" value="fileid2"></td>        
<td>
<label for="fname">First Name</label>
<input  name="fname[]"  type="text" class="stretch" size="15"  maxlength="30" required >
            </td>
            <td>
                    <label for="lname">Last Name</label>
                    <input  name="lname[]"  type="text" class="stretch" size="15" maxlength="30" required  >
                </td>
           </tr>
    </table>
    </ul>
    <button type="button" class="add-row">+ New Client</button>
   <table width="25%" border="0"> <tr> <input type="submit" name="Submit" value="Insert"></tr></table>
  </span>

如何用克隆生成id并将其放入文本框的值

how to generate id with clone and put it value of textbox

jquery

clone