What is the process for retrieving the AJAX response text?

When it comes to my AJAX development, I rely on prototype and utilize the following code:

somefunction: function(){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
            }
        }
    });
    return result;
}

However, I noticed that "result" ends up being an empty string. In an attempt to resolve this issue, I adjusted the code as follows:

somefunction: function(){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
                return result;
            }
        }

    });

}

Despite making these changes, I still encountered the same problem. How can I access the responseText for use in other methods?

Answer №1

Just a friendly reminder that onComplete is triggered long after the execution of someFunction has completed. To ensure you receive the result at the right time, consider passing a callback function as an argument to someFunction. This callback function will be executed once the process is complete:


somefunction: function(callback){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
                callback(result);
            }
        }
    });

}
somefunction(function(result){
  alert(result);
});

Answer №2

Have you considered including "asynchronous: false" in your script? I found that it worked perfectly for me :)

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