Question

How can I assign a variable(var) to a json object which is returned from ajax call to the server? I need to access that object in the rest of the body.

For example, I’ve try this, I don’t know it’s correct.

var selectValues=$(document).ready(function() {
    $.ajax({
                  type: "POST",
                  url: "http://10.0.2.2/mobileajax/callajax.php",
                  data: ({name: theName}),
                  cache: false,
                  dataType: "text",
                  success: onSuccess
                });
})


var $vendor = $('select.mobile-vendor');
var $model = $('select.model');
$vendor.change(
              function() {
                  $model.empty().append(function() {
                      var output = '';
                      $.each(selectValues[$vendor.val()], function(key, value) {
                          output += '<option>' + key + '</option>';
                      });
                      return output;
                  });
              }).change();

// bonus: how to access the download link
$model.change(function() {
    $('a#download-link').attr('href', selectValues[$vendor.val()][$model.val()]).show();
});

Note that, variable selectValues is used in the rest of the body.

Answer 1

I think you should do the whole code inside the $(document).ready(function() function and then make the ajax call synchronous. Because now the ajax call will be made when the document is ready, but the other code will be run directly without waiting for the document to be ready. Also the ajax call is asynchronous by default, so you should make it synchronous and assign the selectValues variable inside the success function of the ajax call. It will become something like this:

$(document).ready(function() {
        var selectValues;
        $.ajax({
              type: "POST",
              url: "http://10.0.2.2/mobileajax/callajax.php",
              data: ({name: theName}),
              cache: false,
              dataType: "text",
              async: false,
              success: function(data) {
                selectValues = data
              }
            });

            var $vendor = $('select.mobile-vendor');
            var $model = $('select.model');
            $vendor.change(
                          function() {
                              $model.empty().append(function() {
                                  var output = '';
                                  $.each(selectValues[$vendor.val()], function(key, value) {
                                      output += '<option>' + key + '</option>';
                                  });
                                  return output;
                              });
                          }).change();

            // bonus: how to access the download link
            $model.change(function() {
                $('a#download-link').attr('href', selectValues[$vendor.val()][$model.val()]).show();
            });
})