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PODeclaring Variable within AJAX function and Calling It Later (jQuery)
 

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  1. PODeclaring Variable within AJAX function and Calling It Later (jQuery)
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    <p>I've got an AJAX function that works correctly but I can't seem to access variables that I'm declaring within the function later in the page. If you look at the below code, you'll see I alert the variable number_rows within the function which works but when I try to log it outside of the function, it comes back as 'undefined.'</p> <pre><code>var newData = "user_id=" + id; $.ajax({ type: 'POST', // HTTP method POST or GET url: 'ajax.php', //Where to make Ajax calls dataType:'text', // Data type, HTML, json etc. data:newData, //post variables success:function(response){ var number_rows = response; alert(number_rows); }, error:function (xhr, ajaxOptions, thrownError){ alert(xhr + " " + ajaxOptions + " " + thrownError); //throw any errors } }); console.log(number_rows); </code></pre> <p>I understand my scope may be off. I tried to move all of my code within the success function but that causing a bunch of other issues so the easiest thing would be to get the response variable to be a global variable that I could use throughout the rest of the page's code. I also tried something like this:</p> <pre><code>success:function(response){ $('body').append('&lt;span class="ajax_response" id="' + response + '"&gt;&lt;/span&gt;'); } var number_rows = $('.ajax_response').attr('id'); console.log(number_rows); </code></pre> <p>But for some reason it isn't able to pick up the ID value immediately that way. I can confirm that the span does get made with the correct ID value but for some reason it doesn't handle it correctly. Any help with this would be greatly appreciated.</p> <p>Thanks!</p>
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    1. USMillerMedia
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    1. COIt's *a*jax, and even if the variable would be global it would not have a value until the ajax finishes. Moving your code into the success callback function is indeed the way to go.
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      1. USBergi
    2. COAt [jquery learn scope](http://learn.jquery.com/javascript-101/scope/), you will find an answer. And make your xhr synchron.
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      1. USMamuz
    3. COJust make sure that "later" is after the success callback happens and you'll be golden.
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      1. USKevin B
 

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