javascript - 点击添加 HTML 元素

Question

我被jquery困住了，其中我试图添加动态html元素(单击+)，单击(-)也应该将其删除。每个元素应该有唯一的名称和 ID，例如“name_1”、“name_2”...

但这似乎并不符合我的意愿。

这是我的代码:

$(document).ready(function() {
  var maxField = 10;
  var addButton = $('.add_button');
  var wrapper = $('.field_wrapper');
  var fieldHTML = $('.field_wrapper1').html();
  var x = 1;
  $('.add_button').click(function() {
    if (x < maxField) {
      x++;
      $('.field_wrapper').append('<div class="field_wrapper1" style = "display:none;margin:20px;"><div><strong>*Upload New Contract Copy :</strong><input type="text" name="text_1" id = "text_1" value="" maxlength="50"/><strong><font color="#ff0000">* </font>Upload New Contract Copy :</strong><input type="file" name="pdf_1" id="pdf_1" accept="application/pdf" /><a href="javascript:void(0);" class="remove_button" title="Remove field"><img src="http://www.allintravellocal.com/images/minus_img.jpg"/></a><label for="contract_copy_pdf" class="err" id="err_lbl_contract_copy_pdf"></label></div></div>');
    }
  });
  $(wrapper).delegate('.remove_button', 'click', function(e) {
    e.preventDefault();
    $(this).parent('div').remove();
    x--;
  });
});

<div class="field_wrapper">
  <div>
    <strong><font color='#ff0000'>* </font>Upload New Contract Copy :</strong>
    <input type="text" name="contract_copy_text_1" id="contract_copy_text_1" value="" maxlength="50" />
    <strong><font color='#ff0000'>* </font>Upload New Contract Copy :</strong>
    <input type="file" name="contract_copy_pdf_1" id="contract_copy_pdf_1" accept="application/pdf" />&nbsp;&nbsp;&nbsp;&nbsp;(*.pdf)
    <a href="javascript:void(0);" class="add_button" title="Add field">
      <img src="http://www.allintravellocal.com/images/plus_img.jpg" />
    </a>
    <label for="contract_copy_pdf" class="err" id="err_lbl_contract_copy_pdf"></label>
  </div>
</div>

这是我的 fiddle :

Demo

Answer 1

它按预期工作，但需要修改的地方很少:

<强> DEMO

• You have set display:none to your added element and even though its getting appended its not getting shown in the UI. So just remove that property as below:

$('.field_wrapper').append('<div class="field_wrapper1" style = "margin:20px;">... }

• Use .on instead of .delegate if you are using jquery.js > 1.7 because As of jQuery 1.7, .delegate() has been superseded by the .on() method according to this and so the below code changes

更改

$(wrapper).on('click','.remove_button', function(e){ 
     e.preventDefault();
     $(this).parent('div').remove();
     x--;
});