JForm showon attribute does not work in admin site

Question

I have a form field which needs to be shown depending on value selected for another field. For example

<field name="field1" type="list" label="LABEL1" description="DESC1" filter="intval" size="1" default="0" class="form-control">
  <option value="0">Option 0</option>
  <option value="1">Option 1</option>
</field>
<field name="field2" showon="field1:1" type="list" label="LABEL2" description="DESC2" filter="intval" size="1" default="0" class="form-control">
  <option value="3">Option 3</option>
  <option value="4">Option 4</option>
</field>

In my above code, field2 will be shown only when field1 value is 1. This works fine from the front-end form. However the same form does not work in my admin component. Is there any special JavaScript file needs to be loaded for this to work?

Answer 1

Found what the issue is. I was using getInput function to show the field.

$this->form->getInput('field2'); 

but showon attribute working only if I render the field using renderField function

$this->form->renderField('field2'); 

Hope this helps someone facing the same issue