我的想法是在单击“添加”按钮时最多创建 20 个 block (它包含一些输入字段)，如果您点击“添加”按钮，则可以添加新 block ，这已成功完成。现在我想删除在单击“添加”按钮时创建的 block 。
例如:如果用户使用“添加”按钮创建了 5 个区 block 。如果用户点击 block 2 中的“减号”按钮，则 block 2 应从列表中删除， block 的计数应相应更新。 
http://www.w3schools.com/code/tryit.asp?filename=FADO51NINJMD
<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var i = 1;
$(document).ready(function () {
$("#commentForm").validate();
});
function add()
{
var objTo = document.getElementById('room_fileds')
var divtest = document.createElement("div");
var label = document.createElement('label');
label.innerHTML = '<h5 class="label">Block '+i+'<input type="button" value="Minus" onclick="minus()"></h5>';
divtest.appendChild(label);
var length = $('#Length').clone().attr('id', 'Length' + i).attr('name', 'Length' + i);
var attribute = $('#Attribute').clone().attr('id', 'Attribute' + i).attr('name', 'Attribute' + i);
var column = $('#Column').clone().attr('id', 'Column' + i).attr('name', 'Column' + i);
length.appendTo(divtest);
attribute.appendTo(divtest);
column.appendTo(divtest);
objTo.appendChild(divtest);
i++
}
function minus()
{
}
</script>
</head>
<body>
<form id="commentForm" method="post" action="">
<div id="room_fileds">
Static Field
<input type="text" name="Length" maxlength="2" id="Length" onkeypress="return isNumberKey(event);" placeholder="Field 1 Length" class="form-control required">
<input type="text" name="Attribute" id="Attribute" placeholder="Field 1 Attribute" class="form-control" required>
<select name="Column" id="Column" class="required" >
<option selected value="">Field Column </option>
<option value="1">YES</option>
<option value="2">NO</option>
</select>
</div>
<br><br>
<input class="submit" type="submit" value="Submit1">
<input type="button" value="Add" onclick="add()">
</form>
</body>
</html>
最佳答案
创建div节点时设置id
divtest.setAttribute("id", "div" + i);
对于 minus 函数，在 onclick 中传递创建的 id 数字
label.innerHTML = '<h5 class="label">Block '+i+'<input type="button" onclick="minus('+i+')" value="Minus"></h5>';
并设置minus函数为
function minus(_id)
{
var _div_id = "div" + _id;
var _div_elem = document.getElementById(_div_id);
_div_elem.parentNode.removeChild(_div_elem);
}
var i = 1;
$(document).ready(function () {
//$("#commentForm").validate();
});
function add()
{
var objTo = document.getElementById('room_fileds')
var divtest = document.createElement("div");
divtest.setAttribute("id","div" + i);
var label = document.createElement('label');
label.innerHTML = '<h5 class="label">Block '+i+'<input type="button" onclick="minus('+i+')" value="Minus"></h5>';
divtest.appendChild(label);
var length = $('#Length').clone().attr('id', 'Length' + i).attr('name', 'Length' + i);
var attribute = $('#Attribute').clone().attr('id', 'Attribute' + i).attr('name', 'Attribute' + i);
var column = $('#Column').clone().attr('id', 'Column' + i).attr('name', 'Column' + i);
length.appendTo(divtest);
attribute.appendTo(divtest);
column.appendTo(divtest);
objTo.appendChild(divtest);
i++
}
function minus(_id)
{
var _div_id = "div" + _id;
var _div_elem = document.getElementById(_div_id);
_div_elem.parentNode.removeChild(_div_elem);
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<form id="commentForm" method="post" action="">
<div id="room_fileds">Static Field
<input type="text" name="Length" maxlength="2" id="Length" onkeypress="return isNumberKey(event);" placeholder="Field 1 Length" class="form-control required">
<input type="text" name="Attribute" id="Attribute" placeholder="Field 1 Attribute" class="form-control" required>
<select name="Column" id="Column" class="required" >
<option selected value="">Field Column </option>
<option value="1">YES</option>
<option value="2">NO</option>
</select>
</div><br><br>
<input class="submit" type="submit" value="Submit1">
<input type="button" value="Add" onclick="add()">
</form>关于javascript - 如何从 div 级别删除动态生成的字段？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40945689/