CODEWITHSUNDEEP
jqueryajaxjsonvariables
Sebastien
Sebastien

Reputation: 2679

Jquery - Store Ajax jSON response as variable

I'm trying to get the result of an ajax request to set in a variable which I can access outside that request. I've tried this JQuery - Storing ajax response into global variable but my variable beer remains undefined outside the $.getJSON and $.ajax functions (I tried both).

Here is my code and where I am able to see the results from the console.log(beer).

var beer;
$.getJSON(jsonUrl, function (json) {
    beer = json;
    console.log(beer); // returns beer
});
console.log(beer); // returns undefined

var beer = (function () {
    var result;

    $.ajax({
        url: jsonUrl,
        success: function (data) {
            result = data;
            console.log(beer); // returns beer

        }
    });
    console.log(result); // returns undefined
    if (result) return result;
})();
console.log(beer); // returns undefined

Upvotes: 17

Views: 44316

Answers (3)

userlond
userlond

Reputation: 3834

Suggest the code below:

var beer = $.ajax({
    url: jsonUrl,
    async: false,
    dataType: 'json'
}).responseJSON;

The key moments are:

  1. set async to false, to return result as variable, not call success callback asynchronious
  2. set dataType to json to parse server response string as json

Upvotes: 10

chprpipr
chprpipr

Reputation: 2039

That's an asynchronous request, so it gets fired off, but your script doesn't wait around for a response before it moves on. If you need to wait on a ajax request to finish, try something like this:

var beer;
$.getJSON(jsonUrl,function(json){
    beer = json;   
    checkDrink();                
});         

function checkDrink() {
    console.log(beer);
}

Upvotes: 21

Jaime
Jaime

Reputation: 6814

The problem is that you're trying to access the data before it actually comes back from the server, the 'success' function is actually a callback that gets called when the ajax call finishes successfully. The $.ajax (or $.get) functions return inmediatly...

You would need to somehow signal to the interested functions that you got the data into the 'beer' var inside your success callback

Upvotes: 1

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