AJAX列表更新,获取新元素和计数 [英] AJAX list update, get new elements and count
问题描述
我有这个HTML列表
< ul id ='usernameList'>
< li class ='username'> John< / li>
< li class ='username'> Mark< / li>
< / ul>
以及通过AJAX添加新名称的表单,以逗号分隔的多个添加。响应是一个名称列表
[{name:David,newUser:yes},{name:Sara,newUser:是},{name:Mark,newUser:no}]
我正在尝试插入此名称在列表中按字母顺序排序,如 http://jsfiddle.net/VQu3S/7/ 这是我的AJAX提交
var form = $('# formUsername');
form.submit(function(){
$ .ajax({
type:form.attr('method'),
url:form.attr('action') ,
数据:form.serialize(),
dataType:json,
beforeSend:function(){
//
},
成功:function(data){
var listUsernames = $('#usernameList');
var numUsernames = listUsernames.children()。length;
$。每个(数据,函数(i,用户){
if(user.newUser ==yes){
var htmlUser =< li class ='username'> + user.name +< / li>;
var added = false;
$(。username,listUsernames).each(function(){
if($(this).text()> user.name){
$(htmlUser).insertBefore($(this));
added = true;
}
});
if(!added)
$(htmlUser).appendTo($(listUsernames));
}
// HERE I DO alert('numUsernames')
//我在发送表格之前得到相同数量的用户
//如何在此更新listUsernames和numUsernames的值?
});
}
});
返回false;
});
我的问题是,如何在添加项目后更新listUsernames和numUsernames的值。
您需要在此时更新 numUsernames
。
在你评论的地方添加:
numUsernames = listUsernames.children()。长度;
listUsernames
已经有更新的子项,如它是对父元素的引用。
编辑:Re:你的评论如下:
这应该可行:
$(。username,listUsernames).each(function(){
if($(this ).text()> user.name){
$(htmlUser).insertBefore($(this));
added = true;
return false; // stop` .each `loop。
}
});
I have this html list
<ul id='usernameList'>
<li class='username'>John</li>
<li class='username'>Mark</li>
</ul>
and a form to add new names via AJAX, multiple add separated by commas. The response is a list with the names
[{name:David, newUser:yes}, {name:Sara, newUser:yes}, {name:Mark, newUser:no}]
I'm trying to insert this names sorted alphabetically in the list, like this example http://jsfiddle.net/VQu3S/7/
This is my AJAX submit
var form = $('#formUsername');
form.submit(function () {
$.ajax({
type: form.attr('method'),
url: form.attr('action'),
data: form.serialize(),
dataType: "json",
beforeSend: function () {
//
},
success: function (data) {
var listUsernames = $('#usernameList');
var numUsernames = listUsernames.children().length;
$.each(data, function(i, user) {
if(user.newUser == "yes"){
var htmlUser = "<li class='username'>" + user.name + "</li>";
var added = false;
$(".username", listUsernames).each(function(){
if ($(this).text() > user.name) {
$(htmlUser).insertBefore($(this));
added = true;
}
});
if(!added)
$(htmlUser).appendTo($(listUsernames));
}
// HERE I DO alert('numUsernames')
// I get the same number of users before sending form
// How can I update here the value of listUsernames and numUsernames?
});
}
});
return false;
});
My question is, how I can update the value of listUsernames and numUsernames after adding an item.
You just need to update numUsernames
at that point.
Add this where your comments are:
numUsernames = listUsernames.children().length;
listUsernames
already has the updated children, as it's a reference to the parent element.
Edit: Re: your comment below:
This should probably work:
$(".username", listUsernames).each(function(){
if ($(this).text() > user.name) {
$(htmlUser).insertBefore($(this));
added = true;
return false; // stop `.each` loop.
}
});
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