Variable with json type is not stored

Camunda 7 Topics Discussion & Questions
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Hello, I have a Camunda 7.15.0. I’m trying to save object with json type into variables by using this example: https://camunda.com/blog/2015/02/json-everywhere-how-to-use-json-in/, but variable with json type isn’t created. If I change type to another like String or whatever, variable will be created and storing, but I need json type to interact with variable during working with diagram.

test_json_variables.bpmn (3.2 KB)

html code

<form role="form" class="form-horizontal">
    <script cam-script type="text/form-script">

        var customer = $scope.customer = {};
  
      camForm.on('form-loaded', function () {
        // declare a 'json' variable 'customer'
        camForm.variableManager.createVariable({
          name: 'customer',
          type: 'json',
          value: customer
        });
      });
  
    </script>
    <div class="control-group">
        <label class="control-label" for="firstName">First Name</label>
        <div class="controls">
            <input id="firstName" class="form-control" type="text" ng-model="customer.firstName" required />
        </div>
    </div>

</form>