jQuery-从.post返回的数据的选择器

问题描述

我正在做一个简单的jQuery帖子:

I am doing a simple jQuery post:

$.post('/form.html',
            $("#form").serialize(),
            function(data, textStatus) {
//Selector for finding a field in the data
});

如何处理针对变量数据的选择器?

How do I process a selector against the variable data?

我需要查找html中存在的特定ID邮寄回来了吗?

I need to look for a specific id that exists within the htmlreturned from the post call?

推荐答案

数据是否为HTML块，其中包含带有id的HTML元素?

Is the data a block of HTML that has an HTML element with an id?

例如，假设帖子返回的数据如下

For example, say the data returned from the post looks like

"<div><p id='firstParagraph'>Some text</p><input type='hidden' id='hiddenField' value="42">Some more text</p></div>"

并说您只想提取"hiddenField"元素的值.你可以做

and say that you just want to pull out the value of the "hiddenField" element. You can do

$.post('/form.html',
            $("#form").serialize(),
            function(data, textStatus) {
                  var hiddenValue = $("#hiddenField", $(data) ).val();
                  //hiddenValue now equals "42"
});

选择器中的$(data)部分正在创建一个上下文，选择器将在其中运行. $("#hiddenField", $(data) ).val()与执行$(data).find("#hiddenField").val()完全相同.

The $(data) part in the selector is creating a context in which the selector will operate. $("#hiddenField", $(data) ).val() is the exact equivalent of doing $(data).find("#hiddenField").val().

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