jquery：如果语句在ajax成功函数内不起作用

I have a success function in my AJAX which returns the response text from a python script which can be either "SUCCESS" or "EMPTY". Now I want to place an if-loop inside the success function, but the if-loop is not working. I am getting the correct data from my python script because my alert statement is working fine and printing "SUCCESS". But it does not enter the ifloop

我在我的AJAX中有一个成功函数，它从python脚本返回响应文本，该脚本可以是“SUCCESS”或“EMPTY”。现在我想在成功函数中放置一个if循环，但是if循环不起作用。我从我的python脚本中获取正确的数据，因为我的警报语句工作正常并打印“SUCCESS”。但它没有进入ifloop

I have tried a bunch of things but the control is not entering the if-loop, could anyone please tell me what I am doing wrong:

我已经尝试了很多东西，但是控件没有进入if循环，有人可以告诉我我做错了什么：

submitHandler: function (form) {

                $.ajax({
                    type: 'post',
                    url: '/cgi-bin/getdataworld.py',
                    data: $(form).serialize(),

                    success: function(data) {
                            //document.write(result);
                            console.log("result is "+data);
                            alert(data);

                            if(data === "SUCCESS"){
                            window.location = 'index.html';
                               }
                           else{
                                 alert("NO DATA PRESENT");
                               }


                    },

                    error: function (responseData) {
                console.log('Ajax request not recieved!');
            }

                });

                return false;
            }

3 个解决方案

#1

This means that what you're responding with isn't "SUCCESS". It probably has a line break or other whitespace before or after it, maybe more than one.

这意味着你所回应的不是“成功”。它可能在它之前或之后有一个换行符或其他空格，也许不止一个。

Perhaps:

也许：

if (/^\s*SUCCESS\s*$/.test(data)) {
    // Success
}

Or use jQuery's $.trim:

或者使用jQuery的$ .trim：

if ($.trim(data) === "SUCCESS") {
    // Success
}

Also be sure that you're not replying with "Success" or "success", as string comparisons are case-sensitive.

还要确保您没有回复“成功”或“成功”，因为字符串比较区分大小写。

If you're not sure:

如果你不确定：

if (/^\s*SUCCESS\s*$/i.test(data)) {
    // Success
}

要么

if ($.trim(data).toUpperCase() === "SUCCESS") {
    // Success
}

#2

check if you don't have any additional spaces before/after "SUCCESS"

检查“SUCCESS”之前/之后是否没有任何额外空格

And also try to change

并尝试改变

if(data === "SUCCESS"){

至

if(data == "SUCCESS"){

#3

-1

submitHandler: function (form) {

            $.ajax({
                type: 'post',
                url: '/cgi-bin/getdataworld.py',
                data: $(form).serialize(),

                success: function(data1) {
                        //document.write(result);
                        console.log("result is "+data1);
                        alert(data1);

                        if(data1 == "SUCCESS"){
                        window.location = 'index.html';
                           }
                       else{
                             alert("NO DATA PRESENT");
                           }


                },

                error: function (responseData) {
            console.log('Ajax rariequest not recieved!');
        }

            });

            return false;
        }

try this here two things i noticed one is === in if statement and other you are using data as variable some time its conflicts in some browser

在这里尝试这两件事我注意到一个是===在if语句和其他你使用数据作为变量一段时间它在某些浏览器中的冲突

#1