CODEWITHSUNDEEP
javascriptjqueryjsp
itsme
itsme

Reputation: 135

jquery - scope getting lost in variable

I am developing application which will get some dynamic content which is irrelevant to my question. and the question is

 var pat;
 $.post('venki/path.jsp', { nam:nam } , function(data) {
     pat=data;
     alert(pat); //it will displayed the received code form path.jsp   
 });
 alert(pat);// it will not keep the data received from path.jsp

Now I need to not lose the scope.

For example:

var pat=0;

$.post(
     pat = 1    
);

alert(pat);

It should alert 1 and not o

In java, i should use static. In jquery, how to declare static variables.

Got an answer: Its simple and very useful and no need to worry about synchronous. the answer is tricky...

Upvotes: 0

Views: 264

Answers (2)

Milind Anantwar
Milind Anantwar

Reputation: 82241

it is because post request is not completed when you are alerting pat value. To ensure that value is modified, alert it inside post success function:

var pat;
 $.post('venki/path.jsp', { nam:nam } , function(data) {
    pat=data;
    alert(pat); //modified value   
  });

Upvotes: 4

imkrisna
imkrisna

Reputation: 853

If i'm not mistaken, the $.post is async so the pat is not losing it's scope but executed before the pat=data executed

To make it synchronous call look at this question: how to make a jquery "$.post" request synchronous

Upvotes: 3

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