Pass a variable from a get query in javascript

Question

I am trying to pass the value of a parameter outside a $.get jQuery in javascript. I read that I should somehow do that in synchronous mode but I couldn't find a solution.

Here is my code:

var flag;
var t = $.get("mutalyzer.php?id="+variation.value, function(data) {
    flag=data;
});
document.write(flag);

where I get undefined as a result.

Thanks!

Put the document.write() inside the $.get() callback, and don't take suggestions to use synchronous ajax seriously. — Pointy
– Pointy, Commented Apr 1, 2013 at 13:37

bipen · Accepted Answer · 2013-04-01 13:37:57Z

3

write it inside the callback function

try this

var t = $.get("mutalyzer.php?id="+variation.value, function(data) {
   //this is the callback function and runs when get gets  completed
   flag=data;
   document.write(flag); 
 });

answered Apr 1, 2013 at 13:37

bipen

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3 Comments

Pointy Over a year ago

it should be noted that calling document.write() in there will indeed show the value returned, but the net result will be that that will be all that's left of the original page.

user2232230 Over a year ago

HI, actually i want to use the variable flag in other functions in my code, not only print it.

bipen Over a year ago

then you need to pass that inside the callback function..... calling it outside is not a good idea since you function may get called before the ajax returns something

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