【发布时间】：2019-05-20 02:25:35
【问题描述】：
我正在模态表单上创建动态 div，并使用关闭按钮破坏它们，到目前为止工作正常。 然后，我添加了一个按钮来添加新的 divs/forms 项目，但是这次关闭按钮回调没有被调用并关闭模式而不是破坏 div 本身。从 addNewRow 创建行时，不会调用回调函数。代码如下：
console.log("hello");
var myModal = $('#exampleModal');
var myForm = $('#exampleModal #myForm');
var value = $('#redactorArea3').val();
var result = jQuery.parseJSON(value);
var recordsCounter = 0;
for (var index in result){
var obj = result[index];
var mydiv = '<div id="pepe'+index+'" class="input-group mb-3">';
for (var property in obj){
var attrName = property;
var attrValue = obj[property];
//myForm.append('<div class="form-group"><label>'+attrName+'</label><textarea class="form-control" id="exampleFormControlTextarea1" rows="1">'+ attrValue +'</textarea></div>');
mydiv += '<div class="input-group-prepend"><span class="input-group-text">'+attrName+'</span></div><input type="text" class="form-control" id="field'+index+'" value="'+attrValue+'">';
}
mydiv += '<button id="remove' + index + '" class="btn btn-danger remove-me" >-</button></div>';
myForm.append( mydiv);
recordsCounter++;
}
function addNewRow(){
recordsCounter++;
var mydiv = '<div id="pepe'+recordsCounter+'" class="input-group mb-3">';
mydiv += '<div class="input-group-prepend"><span class="input-group-text"></span></div><input type="text" class="form-control" id="field'+recordsCounter+'">';
mydiv += '<div class="input-group-prepend"><span class="input-group-text"></span></div><input type="text" class="form-control" id="field'+recordsCounter+'">';
mydiv += '<button id="remove' + recordsCounter + '" class="btn btn-danger remove-me" >-</button></div>';
myForm.append( mydiv);
console.log("add row");
}
$('.remove-me').click(function(e){
console.log("remove me");
e.preventDefault();
var fieldNum = this.id.charAt(this.id.length-1);
var fieldID = "#field" + fieldNum;
var pepeId = "#pepe" + fieldNum;
$(this).remove();
$(fieldID).remove();
$(pepeId).remove();
recordsCounter--;
});<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<title>Mara test</title>
</head>
<body>
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
Show modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Database management</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<div class="data_list">
<ul>
</ul>
<form id="myForm">
<div id="formItems">
</div>
</form>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
<button type="button" class="btn btn-success" onclick="addNewRow();">+</button>
</div>
</div>
</div>
</div>
<!-- Modal -->
<div class="d-none">
<textarea id="redactorArea3" class="text-justify">[{"name": "S","price": "20.00"},{"name":"M","price": "20.00"},{"name":"L","price": "20.00"},{"name":"XL","price": "20.00"},{"name":"2XL","price": "21.00"},{"name":"3XL","price": "22.00"}]</textarea>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="mara.js"></script>
</body>
</html>【问题讨论】：
-
您如何定义未被调用的事件？很可能是因为在添加事件之后添加了行。对于动态创建的元素，您需要使用 .on() 将事件委托给父元素。
-
还有一个建议：如果您在问题中创建一个（非）工作代码示例，它会让人们更容易很多来帮助您。在您上面的代码示例中，很多重要的细节都被遗漏了，例如您如何设置事件处理程序、HTML 等。
-
谢谢，我刚刚添加了完整的代码。通风口链接到引导类
-
好的，所以请注意这里的代码：
$('.remove-me').click(...)您正在将事件附加到从选择器$('.remove-me')返回的所有元素，但这绝不会包括当时尚不存在的动态元素那行代码运行。为了绑定到未来的元素，您需要将事件处理程序委托到父元素或更高元素。在这种情况下，您可以尝试$('.input-group.mb-3).on('click', '.remove-me, function(e) {...})
标签： javascript forms bootstrap-4