为什么$（本）AJAX调用后未定义 [英] How come $(this) is undefined after ajax call

问题描述

我在做一个Ajax请求时，一个锚标记被点击一个ID设置为HREF。顺便说一句，这个锚标记是动态创建的。

I am doing an ajax request when an anchor tag is clicked with an ID set to href. Btw, this anchor tag is dynamically created.

<a href="983" class="commentDeleteLink">delete</a>

在锚标记被点击以下code执行：

When the anchor tag is clicked the following code is executed:

    $('.commentDeleteLink').live('click', function(event) {
        event.preventDefault();
        var result = confirm('Proceed?');

        if ( result ) {
            $.ajax({
                url: window.config.AJAX_REQUEST,
                type: "POST",
                data: { action       : 'DELCOMMENT',
                        comment      : $('#commentText').val(),
                        comment_id   : $(this).attr('href') },
                success: function(result) {
                    alert($(this).attr('href'));
                    //$(this).fadeOut(slow);
                }
            });
        }
    });

当我试图显示$（本）.attr（HREF），它说这是不确定。我真正想要做的是淡出锚标记，但是当我调查了$ a的值（这）是不确定。

When I tried to display $(this).attr('href') it says it's "undefined". What I really want to do is fadeOut the anchor tag but when I investigated the value of $(this) it is "undefined".

出了什么问题与上面的代码段？

What could be wrong with the snippet above?

推荐答案

您应该尝试

$('.commentDeleteLink').live('click', function(event) {
    event.preventDefault();
    var result = confirm('Proceed?');
    var that = this;
    if ( result ) {
        $.ajax({
            url: window.config.AJAX_REQUEST,
            type: "POST",
            data: { action       : 'DELCOMMENT',
                    comment      : $('#commentText').val(),
                    comment_id   : $(this).attr('href') },
            success: function(result) {
                alert($(that).attr('href'));
                //$(that).fadeOut(slow);
            }
        });
    }
});

由于这在回调不被点击的元素，你应该缓存这在变量是，你可以重新使用，是不理智的情况下

because this in the callback is not the clicked element, you should cache this in a variable that that you can re-use and is not sensible to the context

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